[TOC]
- 作者：Crazy.X
- QQ：200538725
- 微信：Xri2117
- Github：SpringCloud入门教程
- Github：ElasticSearch入门教程
- CSDN：https://blog.csdn.net/weixin_38880770/article/details/103002456
- 若小伙伴们喜欢教程的麻烦给点个star 非常感谢，有什么需要的教程可以联系我，有时间我会一一送上
- 作者有Java技术群，想加入Java群的可以加微信，备注消息Java拉入群聊
- 一个索引可以理解成一个关系数据库的库
- 一种type就像一类表，比如user表，order表
- mapping定义了每个字段的类型等信息。相当于关系型数据库中的表结
- 一个document相当于关系型数据库中的一⾏行行记录
- 相当于关系型数据库表的字段
-集群由一个或多个节点组成，一个集群有一个默认名称"elasticsearch"
- 集群的节点，一台机器 或者一个进程
- 副本是分片的副本。分⽚有主分片(primary Shard)和副本分片(replica Shard)之分。Index数据在物理理上被分布在多个主分片中，每个主分片只存放部分数据。每个主分⽚可以有多个副本，叫副本分片，是主分片的复制。
- text
- 用于全文索引，该类型的字段将通过分词器 进⾏分词
- keyword
- 不分词，只能搜索该字段的完整的值
- long, integer, short, byte, double, float, half_float, scaled_float
- boolean
- binary
- 该类型的字段把值当做经过 base64 编码的字符串，默认不存储，且不可搜索
- 范围类型表示值是一个范围，而不是⼀个具体的值
- integer_range, float_range, long_range, double_range, date_range
- 譬如 age 的类型是 integer_range，那么值可以是 {"gte" : 20, "lte" : 40}；搜索 "term" : {"age": 21} 可以搜索该值
- date
- 由于Json没有date类型，所以es通过识别字符串是否符合format定义的格式来判断是否为date类型
- format默认为：strict_date_optional_time||epoch_millis
- "2022-01-01" "2022/01/01 12:10:30" 这种字符串格式
- 请求
localhost:9200/nba- 响应
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "nba"
}- 请求
localhost:9200/nba- 响应
{
"nba": {
"aliases": {}, // 别名
"mappings": {}, // 表结构
"settings": { // 索引设置
"index": { // 创建时间
"creation_date": "1573278626713",
"number_of_shards": "1", // 分片数量
"number_of_replicas": "1", // 副本数量
"uuid": "eeQmIsZ8Tl-GJ-xpFuOirg", // UUID 索引的唯一ID
"version": {
"created": "7020199"
},
"provided_name": "nba"
}
}
}
}- 请求
localhost:9200/nba- 响应
{
"acknowledged": true
}- 请求
localhost:9200/cba,nba-响应
{
"cba": {
"aliases": {},
"mappings": {},
"settings": {
"index": {
"creation_date": "1573281458107",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "ikxZrzk2TVqQn7zRi2_glw",
"version": {
"created": "7020199"
},
"provided_name": "cba"
}
}
},
"nba": {
"aliases": {},
"mappings": {},
"settings": {
"index": {
"creation_date": "1573281355145",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "hkhv1WKSQqWil3P9UXt3Aw",
"version": {
"created": "7020199"
},
"provided_name": "nba"
}
}
}
}- 请求
localhost:9200/_all-响应
}
}
"cba": {
"aliases": {},
"mappings": {},
"settings": {
"index": {
"creation_date": "1573281458107",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "ikxZrzk2TVqQn7zRi2_glw",
"version": {
"created": "7020199"
},
"provided_name": "cba"
}
}
},
"nba": {
"aliases": {},
"mappings": {},
"settings": {
"index": {
"creation_date": "1573281355145",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "hkhv1WKSQqWil3P9UXt3Aw",
"version": {
"created": "7020199"
},
"provided_name": "nba"
}
}
}- 请求
localhost:9200/_cat/indices?v-响应
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open .kibana_task_manager YA0slSRkRJqrE_jF0aOlFA 1 0 2 0 45.5kb 45.5kb
yellow open cba ikxZrzk2TVqQn7zRi2_glw 1 1 0 0 230b 230b
yellow open nba hkhv1WKSQqWil3P9UXt3Aw 1 1 0 0 283b 283b
green open .kibana_1 579wwXgCQJKJU1Ge7cJVXw 1 0 4 1 24kb 24kb
- 请求
localhost:9200/nba-响应
状态码"200"则为存在，不存在则为"404"
- 请求
localhost:9200/nba/_close-响应
{
"acknowledged": true,
"shards_acknowledged": true
}- 请求
localhost:9200/nba/_open-响应
{
"acknowledged": true,
"shards_acknowledged": true
}- type: text 可分词
- type: keyword 不可分词
- 请求
localhost:9200/nba/_mapping- 请求体
{
"properties":{ //字段的信息
"name":{
"type":"text"
},
"team_name":{
"type":"text"
},
"position":{
"type":"keyword"
},
"play_year":{
"type":"keyword"
},
"jerse_no":{
"type":"keyword"
}
}
}-响应
{
"acknowledged": true
}- 请求
localhost:9200/nba/_mapping- 响应
{
"nba": {
"mappings": {
"properties": {
"jerse_no": {
"type": "keyword"
},
"name": {
"type": "text"
},
"play_year": {
"type": "keyword"
},
"position": {
"type": "keyword"
},
"team_name": {
"type": "text"
}
}
}
}
}- 请求
localhost:9200/nba,cba/_mapping- 响应
{
"nba": {
"mappings": {
"properties": {
"jerse_no": {
"type": "keyword"
},
"name": {
"type": "text"
},
"play_year": {
"type": "keyword"
},
"position": {
"type": "keyword"
},
"team_name": {
"type": "text"
}
}
}
},
"cba": {
"mappings": {}
}
}- 请求
localhost:9200/_mapping- 响应
{
"nba": {
"mappings": {
"properties": {
"jerse_no": {
"type": "keyword"
},
"name": {
"type": "text"
},
"play_year": {
"type": "keyword"
},
"position": {
"type": "keyword"
},
"team_name": {
"type": "text"
}
}
}
},
"cba": {
"mappings": {}
}
}- 请求
localhost:9200/_all/_mapping- 响应
{
"nba": {
"mappings": {
"properties": {
"jerse_no": {
"type": "keyword"
},
"name": {
"type": "text"
},
"play_year": {
"type": "keyword"
},
"position": {
"type": "keyword"
},
"team_name": {
"type": "text"
}
}
}
},
"cba": {
"mappings": {}
}
}-
Mapping 只可增加字段不可修改字段
-
请求
localhost:9200/nba/_mapping- 请求体
{
"properties":{
"name":{
"type":"text"
},
"team_name":{
"type":"text"
},
"position":{
"type":"keyword"
},
"play_year":{
"type":"keyword"
},
"jerse_no":{
"type":"keyword"
},
"country":{ // 增加的国家字段
"type":"keyword"
}
}
}- 响应
{
"acknowledged": true
}- 请求
localhost:9200/nba/_doc/1- 请求体
{
"name":"哈登",
"team_name":"火箭",
"position":"得分后卫",
"play_year":"10",
"jerse_no":"13"
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1", //文档的ID
"_version": 1,
"result": "created", // 响应结果
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 0,
"_primary_term": 1
}-
注意: 不指定IP只能使用POST请求
-
注意: 自动生成ID开关要打开,关闭状态无法自动创建ID
-
请求
localhost:9200/nba/_doc- 请求体
{
"name":"库里",
"team_name":"勇士",
"position":"组织后卫",
"play_year":"10",
"jerse_no":"30"
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "7PkGT24BeuZ7t7g8CXe-", // 自动生成ID
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 3,
"_primary_term": 1
}-
查看auto_create_index开关状态，请求http://localhost:9200/_cluster/settings
-
注意:当索引不存在并且auto_create_index为true的时候，新增文档时会⾃动创建索引，若为false是不能自动创建索引
-
请求
localhost:9200/wnba/_doc/1- 请求体
{
"name":"周琦",
"team_name":"波兰国家队",
"position":"中锋",
"play_year":"3",
"jerse_no":"9"
}- 响应
{
"_index": "wnba", // 自动创建的索引
"_type": "_doc",
"_id": "1",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 0,
"_primary_term": 1
}- 请求
localhost:9200/wnba- 响应
{
"wnba": {
"aliases": {},
"mappings": {
"properties": {
"jerse_no": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"name": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"play_year": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"position": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"team_name": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
}
}
},
"settings": {
"index": {
"creation_date": "1573284418718",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "fKs9KZ11R3-_zgKi8WFQTQ",
"version": {
"created": "7020199"
},
"provided_name": "wnba"
}
}
}
}-
新增或修改的时候可能会把原有文档修改掉，这里可以指定类型
-
比如文档存在，我要新增一条文档，但是没有指定类型可能修改掉原有的文档
-
请求
localhost:9200/nba/_doc/1?op_type=create- 请求体
{
"name":"周琦",
"team_name":"波兰国家队",
"position":"中锋",
"play_year":"3",
"jerse_no":"9"
}- 响应
{
"error": {
"root_cause": [
{
"type": "version_conflict_engine_exception",
// 文档已经存在
"reason": "[1]: version conflict, document already exists (current version [5])",
"index_uuid": "hkhv1WKSQqWil3P9UXt3Aw",
"shard": "0",
"index": "nba"
}
],
"type": "version_conflict_engine_exception",
"reason": "[1]: version conflict, document already exists (current version [5])",
"index_uuid": "hkhv1WKSQqWil3P9UXt3Aw",
"shard": "0",
"index": "nba"
},
"status": 409
}- 请求
localhost:9200/nba/_doc/1- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 5,
"_seq_no": 5,
"_primary_term": 1,
"found": true,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
}- 请求
localhost:9200/_mget- 请求体
{
"docs" : [ // 指定标签
{
"_index" : "nba", // 指定索引
"_type" : "_doc", // 默认类型
"_id" : "1" // 指定ID
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "2"
}
]
}
- 响应
{
"docs": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 5,
"_seq_no": 5,
"_primary_term": 1,
"found": true,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"found": false
}
]
}- 请求
localhost:9200/nba/_mget // 先指定索引- 请求体
{
"docs" : [
{
"_type" : "_doc",
"_id" : "1"
},
{
"_type" : "_doc",
"_id" : "2"
}
]
}- 响应
{
"docs": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 5,
"_seq_no": 5,
"_primary_term": 1,
"found": true,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"found": false
}
]
}- 请求
localhost:9200/nba/_doc/_mget //指定索引、类型- 请求体
{
"docs" : [
{
"_id" : "1"
},
{
"_id" : "2"
}
]
}- 响应
{
"docs": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 5,
"_seq_no": 5,
"_primary_term": 1,
"found": true,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"found": false
}
]
}- 请求
localhost:9200/nba/_doc/_mget- 请求体
{
"ids":["1","2"]
}- 响应
{
"docs": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 5,
"_seq_no": 5,
"_primary_term": 1,
"found": true,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"found": false
}
]
}-
根据提供的文档片段更新数据
-
请求
localhost:9200/nba/_update/1- 请求体
{
"doc": { // doc标签必须存在
"name": "哈登",
"team_name": "火箭",
"position": "双能卫",
"play_year": "10",
"jerse_no": "13"
}
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 7,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 7,
"_primary_term": 1
}- 请求
localhost:9200/nba/_update/1- 请求体
{
// script:标签 ctx:上下文 ._source = _source
// 语义:通过上下文拿到 _source字段,新增age为18
"script": "ctx._source.age = 18"
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 8,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 8,
"_primary_term": 1
}- 请求
localhost:9200/nba/_update/1- 请求体
{
// json格式无法出现多个" 所以需要转义符
"script": "ctx._source.remove(\"age\")"
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 9,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 9,
"_primary_term": 1
}- 请求
localhost:9200/nba/_update/1- 请求体
{
"script": {
// 先获取ID为1的数据，之后进行age+4
"source": "ctx._source.age += params.age",
// 指定参数
"params": {
"age": 4
}
},
// 若存在则修改,若不存在则新增
"upsert":{
"age": 1
}
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 11,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 11,
"_primary_term": 1
}-
查询更新结果
-
请求
localhost:9200/nba/_doc/1- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_version": 11,
"_seq_no": 11,
"_primary_term": 1,
"found": true,
"_source": {
"name": "大胡子",
"team_name": "火箭",
"position": "双能卫",
"play_year": "10",
"jerse_no": "13",
"age": 22
}
}-
upsert 当指定的⽂文档不不存在时，upsert参数包含的内容将会被插⼊入到索引中，作为⼀一个新⽂文档；如果指定的⽂文档存在，ElasticSearch引擎将会执⾏行行指定的更更新逻辑
-
请求
localhost:9200/nba/_update/3- 请求体
{
"script": {
"source": "ctx._source.allstar += params.allstar",
"params": {
"allstar": 4
}
},
"upsert": {
"allstar": 1
}
}
- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 12,
"_primary_term": 1
}-
查询更新结果upsert结果
-
请求
localhost:9200/nba/_doc/3- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_version": 1,
"_seq_no": 12,
"_primary_term": 1,
"found": true,
"_source": {
"allstar": 1
}
}- 请求
localhost:9200/nba/_doc/3- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_version": 2,
"result": "deleted",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 13,
"_primary_term": 1
}-
term(词条)查询和full text(全⽂文)查询
-
词条查询：词条查询不会分析查询条件，只有当词条和查询字符串完全匹配时，才匹配搜索
-
全⽂查询：ElasticSearch引擎会先分析查询字符串，将其拆分成多个分词，只要已分析的字段中包含词条的任意⼀个，或全部包含，就匹配查询条件，返回该⽂档；如果不包含任意一个分词，表示没有任何文档匹配查询条件
-
term 关键字查询，精确查询
-
例如Sql的where条件
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询词条球号为23
"query":{ // 查询
"term":{ // 词条
"jerse_no":"23" // 字段名称
}
}
}- 响应
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0.9808292,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_score": 0.9808292,
"_source": {
"name": "詹姆斯",
"team_name": "湖人",
"position": "小前锋",
"play_year": "15",
"jerse_no": "23"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
"query":{
"terms":{ // 这里使用terms
"jerse_no": ["23","13"]
}
}
}- 响应
{
"took": 0, // 消耗时间
"timed_out": false, // 是否超时
"_shards": { // 分片
"total": 1, // 分片总体 1
"successful": 1, // 成功 1
"skipped": 0,
"failed": 0
},
"hits": { // 命中
"total": { // 查询总数
"value": 2, // 2条
"relation": "eq"
},
"max_score": 1.0, // 最大分数 返回结果按照分数最大排序
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_score": 1.0,
"_source": {
"name": "詹姆斯",
"team_name": "湖人",
"position": "小前锋",
"play_year": "15",
"jerse_no": "23"
}
}
]
}
}-
全文查询
-
请求
localhost:9200/nba/_search- 请求体
{
"query":{
"match_all":{} // 查询全部文档，默认显示10条记录
},
"from": 0, // 从0开始
"size": 100 // 查询100条
}- 响应
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 1.0,
"_source": {
"name": "库里",
"team_name": "勇士",
"position": "控球后卫",
"play_year": "10",
"jerse_no": "30"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_score": 1.0,
"_source": {
"name": "詹姆斯",
"team_name": "湖人",
"position": "小前锋",
"play_year": "15",
"jerse_no": "23"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
"query":{
"match":{ // 这里使用match
"name": "库小里" //name:字段 会进行分词匹配
}
},
"from": 0,
"size": 100
}- 响应
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 2.0834165,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 2.0834165,
"_source": {
"name": "库里",
"team_name": "勇士",
"position": "控球后卫",
"play_year": "10",
"jerse_no": "30"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
"query":{
"multi_match":{ // 选定多个字段所以使用multi_match
"query": "shooter",
"fields": ["title","name"] // 指定字段
}
}
}- 响应
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0.18232156,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 0.18232156,
"_source": {
"name": "库里",
"team_name": "勇士",
"position": "控球后卫",
"play_year": 10,
"jerse_no": "30",
"title": "the best shooter"
}
}
]
}
}-
准确查询 类似词条查询
-
请求
localhost:9200/nba/_search- 请求体
{
"query":{
"match_phrase":{
"position": "得分后卫"
}
}
}- 响应
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 3.277387,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_score": 3.277387,
"_source": {
"name": "哈登",
"team_name": "火箭",
"position": "得分后卫",
"play_year": "10",
"jerse_no": "13"
}
}
]
}
}-
可以增加前缀
-
请求
localhost:9200/nba/_search- 请求体
{
"query":{
"match_phrase_prefix":{
"title": "the" // 指定了前缀
}
}
}- 响应
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0.2876821,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 0.2876821,
"_source": {
"name": "库里",
"team_name": "勇士",
"position": "控球后卫",
"play_year": 10,
"jerse_no": "30",
"title": "the best shooter"
}
}
]
}
}- Bulkl
- ES提供了Bulk的API 来进行批量操作
- 数据结构类型，以换行区分
// 必须有一个索引叫book
{"index": {"_index": "book", "_type": "_doc", "_id": 1}}
{"name": "权力的游戏"}
{"index": {"_index": "book", "_type": "_doc", "_id": 2}}
{"name": "疯狂的石头"}
// 结尾必须有换行- 请求
curl -X POST "localhost:9200/_bulk" -H 'Content-Type: application/json' --data-binary @name // name就是文件的路径和名字- 测试 查询
{
"query":{
"match_all":{}
},
"from": 0,
"size": 100
}- 单词级别查询
- 这些查询通常⽤用于结构化的数据，⽐比如：number, date, keyword等，而不是对text。
- 也就是说，全⽂本查询之前要先对⽂本内容进⾏分词，⽽单词级别的查询直接在相应字段的反向索引中精确查找，单词级别的查询⼀般⽤于数值、⽇期等类型的字段上
- 准备索引 进行批量导入,数据在player中
{
"mappings":{
"properties":{
"birthDay":{
"type":"date"
},
"birthDayStr": {
"type":"keyword"
},
"age":{
"type":"integer"
},
"code": {
"type":"text"
},
"country":{
"type":"text"
},
"countryEn": {
"type":"text"
},
"displayAffiliation":{
"type":"text"
},
"displayName": {
"type":"text"
},
"displayNameEn":{
"type":"text"
},
"draft": {
"type":"long"
},
"heightValue":{
"type":"float"
},
"jerseyNo": {
"type":"text"
},
"playYear":{
"type":"long"
},
"playerId": {
"type":"keyword"
},
"position":{
"type":"text"
},
"schoolType": {
"type":"text"
},
"teamCity":{
"type":"text"
},
"teamCityEn": {
"type":"text"
},
"teamConference": {
"type":"keyword"
},
"teamConferenceEn":{
"type":"keyword"
},
"teamName": {
"type":"keyword"
},
"teamNameEn":{
"type":"keyword"
},
"weight": {
"type":"text"
}
}
}
}- 请求
localhost:9200/nba/_search- 请求体
{
// 语义:精确查找球衣23号数据并分页
"query": {
"term": {
"jerseyNo": 23
}
},
"from": 0,
"size": 20
}- 响应
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 11,
"relation": "eq"
},
"max_score": 3.6167762,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "73",
"_score": 3.6167762,
"_source": {
"countryEn": "United States",
"teamName": "雄鹿",
"birthDay": 792392400000,
"country": "美国",
"teamCityEn": "Milwaukee",
"code": "sterling_brown",
"displayAffiliation": "Southern Methodist/United States",
"displayName": "斯特林 布朗",
"schoolType": "College",
"teamConference": "东部",
"teamConferenceEn": "Eastern",
"weight": "105.2 公斤",
"teamCity": "密尔沃基",
"playYear": 2,
"jerseyNo": "23",
"teamNameEn": "Bucks",
"draft": 2017,
"displayNameEn": "Sterling Brown",
"heightValue": 1.98,
"birthDayStr": "1995-02-10",
"position": "后卫",
"age": 24,
"playerId": "1628425"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "78",
"_score": 3.6167762,
"_source": {
"countryEn": "United States",
"teamName": "独行侠",
"birthDay": 721544400000,
"country": "美国",
"teamCityEn": "Dallas",
"code": "trey_burke",
"displayAffiliation": "Michigan/United States",
"displayName": "特雷 伯克",
"schoolType": "College",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "79.4 公斤",
"teamCity": "达拉斯",
"playYear": 6,
"jerseyNo": "23",
"teamNameEn": "Mavericks",
"draft": 2013,
"displayNameEn": "Trey Burke",
"heightValue": 1.85,
"birthDayStr": "1992-11-12",
"position": "后卫",
"age": 27,
"playerId": "203504"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "167",
"_score": 3.6167762,
"_source": {
"countryEn": "United States",
"teamName": "雷霆",
"birthDay": 895377600000,
"country": "美国",
"teamCityEn": "Oklahoma City",
"code": "terrance_ferguson",
"displayAffiliation": "United States",
"displayName": "特伦斯 弗格森",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "86.2 公斤",
"teamCity": "俄克拉荷马城",
"playYear": 2,
"jerseyNo": "23",
"teamNameEn": "Thunder",
"draft": 2017,
"displayNameEn": "Terrance Ferguson",
"heightValue": 2.01,
"birthDayStr": "1998-05-17",
"position": "后卫-前锋",
"age": 21,
"playerId": "1628390"
}
}
]
}
}- 请求
- 请求体
{
// 语义:查找teamNameEn 不为空的数据
"query": {
"exists": {
"field": "teamNameEn"
}
},
"from": 0,
"size": 3
}- 响应
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 566,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "老鹰",
"birthDay": 831182400000,
"country": "美国",
"teamCityEn": "Atlanta",
"code": "jaylen_adams",
"displayAffiliation": "United States",
"displayName": "杰伦 亚当斯",
"schoolType": "College",
"teamConference": "东部",
"teamConferenceEn": "Eastern",
"weight": "86.2 公斤",
"teamCity": "亚特兰大",
"playYear": 1,
"jerseyNo": "10",
"teamNameEn": "Hawks",
"draft": 2018,
"displayNameEn": "Jaylen Adams",
"heightValue": 1.88,
"birthDayStr": "1996-05-04",
"position": "后卫",
"age": 23,
"playerId": "1629121"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 1.0,
"_source": {
"countryEn": "New Zealand",
"teamName": "雷霆",
"birthDay": 743140800000,
"country": "新西兰",
"teamCityEn": "Oklahoma City",
"code": "steven_adams",
"displayAffiliation": "Pittsburgh/New Zealand",
"displayName": "斯蒂文 亚当斯",
"schoolType": "College",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "120.2 公斤",
"teamCity": "俄克拉荷马城",
"playYear": 6,
"jerseyNo": "12",
"teamNameEn": "Thunder",
"draft": 2013,
"displayNameEn": "Steven Adams",
"heightValue": 2.13,
"birthDayStr": "1993-07-20",
"position": "中锋",
"age": 26,
"playerId": "203500"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "热火",
"birthDay": 869198400000,
"country": "美国",
"teamCityEn": "Miami",
"code": "bam_adebayo",
"displayAffiliation": "Kentucky/United States",
"displayName": "巴姆 阿德巴约",
"schoolType": "College",
"teamConference": "东部",
"teamConferenceEn": "Eastern",
"weight": "115.7 公斤",
"teamCity": "迈阿密",
"playYear": 2,
"jerseyNo": "13",
"teamNameEn": "Heat",
"draft": 2017,
"displayNameEn": "Bam Adebayo",
"heightValue": 2.08,
"birthDayStr": "1997-07-18",
"position": "中锋-前锋",
"age": 22,
"playerId": "1628389"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
// 语义:查找teamNameEn 不为空的数据 teamNameEn必须为text类型
// 使用前缀类型必须为keyword,不能为text
"query": {
"prefix": {
"teamNameEn": "Rock"
}
},
"from": 0,
"size": 3
}- 响应
{
"took": 4,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 21,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "86",
"_score": 1.0,
"_source": {
"countryEn": "Switzerland",
"teamName": "火箭",
"birthDay": 769233600000,
"country": "瑞士",
"teamCityEn": "Houston",
"code": "clint_capela",
"displayAffiliation": "Switzerland/Switzerland",
"displayName": "克林特 卡佩拉",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "108.9 公斤",
"teamCity": "休斯顿",
"playYear": 5,
"jerseyNo": "15",
"teamNameEn": "Rockets",
"draft": 2014,
"displayNameEn": "Clint Capela",
"heightValue": 2.08,
"birthDayStr": "1994-05-18",
"position": "中锋",
"age": 25,
"playerId": "203991"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "99",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 816930000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "chris_chiozza",
"displayAffiliation": "University of Florida/United States",
"displayName": "克里斯 Chiozza",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "79.4 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "2",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Chris Chiozza",
"heightValue": 1.83,
"birthDayStr": "1995-11-21",
"position": "后卫",
"age": 24,
"playerId": "1629185"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "101",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 784962000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "gary_clark",
"displayAffiliation": "University of Cincinnati/United States",
"displayName": "加里 克拉克",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "102.1 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "6",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Gary Clark",
"heightValue": 2.03,
"birthDayStr": "1994-11-16",
"position": "前锋",
"age": 25,
"playerId": "1629109"
}
}
]
}
}-
*表示任意字符，?表示任意单个字符,类似SQL模糊查询
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询teamNameEn为Ro*s *为模糊搜索
"query": {
"wildcard": {
"teamNameEn": "Ro*s"
}
},
"from": 0,
"size": 3
}- 响应
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 21,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "86",
"_score": 1.0,
"_source": {
"countryEn": "Switzerland",
"teamName": "火箭",
"birthDay": 769233600000,
"country": "瑞士",
"teamCityEn": "Houston",
"code": "clint_capela",
"displayAffiliation": "Switzerland/Switzerland",
"displayName": "克林特 卡佩拉",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "108.9 公斤",
"teamCity": "休斯顿",
"playYear": 5,
"jerseyNo": "15",
"teamNameEn": "Rockets",
"draft": 2014,
"displayNameEn": "Clint Capela",
"heightValue": 2.08,
"birthDayStr": "1994-05-18",
"position": "中锋",
"age": 25,
"playerId": "203991"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "99",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 816930000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "chris_chiozza",
"displayAffiliation": "University of Florida/United States",
"displayName": "克里斯 Chiozza",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "79.4 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "2",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Chris Chiozza",
"heightValue": 1.83,
"birthDayStr": "1995-11-21",
"position": "后卫",
"age": 24,
"playerId": "1629185"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "101",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 784962000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "gary_clark",
"displayAffiliation": "University of Cincinnati/United States",
"displayName": "加里 克拉克",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "102.1 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "6",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Gary Clark",
"heightValue": 2.03,
"birthDayStr": "1994-11-16",
"position": "前锋",
"age": 25,
"playerId": "1629109"
}
}
]
}
}- 请求
- 请求体
{
// 语义: 查询teamNameEn 为Ro.*s .表示任意 *为多个
"query": {
"regexp": {
"teamNameEn": "Ro.*s"
}
},
"from": 0,
"size": 3
}- 响应
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 21,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "86",
"_score": 1.0,
"_source": {
"countryEn": "Switzerland",
"teamName": "火箭",
"birthDay": 769233600000,
"country": "瑞士",
"teamCityEn": "Houston",
"code": "clint_capela",
"displayAffiliation": "Switzerland/Switzerland",
"displayName": "克林特 卡佩拉",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "108.9 公斤",
"teamCity": "休斯顿",
"playYear": 5,
"jerseyNo": "15",
"teamNameEn": "Rockets",
"draft": 2014,
"displayNameEn": "Clint Capela",
"heightValue": 2.08,
"birthDayStr": "1994-05-18",
"position": "中锋",
"age": 25,
"playerId": "203991"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "99",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 816930000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "chris_chiozza",
"displayAffiliation": "University of Florida/United States",
"displayName": "克里斯 Chiozza",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "79.4 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "2",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Chris Chiozza",
"heightValue": 1.83,
"birthDayStr": "1995-11-21",
"position": "后卫",
"age": 24,
"playerId": "1629185"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "101",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "火箭",
"birthDay": 784962000000,
"country": "美国",
"teamCityEn": "Houston",
"code": "gary_clark",
"displayAffiliation": "University of Cincinnati/United States",
"displayName": "加里 克拉克",
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "102.1 公斤",
"teamCity": "休斯顿",
"playYear": 1,
"jerseyNo": "6",
"teamNameEn": "Rockets",
"draft": 2018,
"displayNameEn": "Gary Clark",
"heightValue": 2.03,
"birthDayStr": "1994-11-16",
"position": "前锋",
"age": 25,
"playerId": "1629109"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
"query": {
"ids": {
"values": [1,2,3]
}
},
"from": 0,
"size": 3
}- 响应
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "nba",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "老鹰",
"birthDay": 831182400000,
"country": "美国",
"teamCityEn": "Atlanta",
"code": "jaylen_adams",
"displayAffiliation": "United States",
"displayName": "杰伦 亚当斯",
"schoolType": "College",
"teamConference": "东部",
"teamConferenceEn": "Eastern",
"weight": "86.2 公斤",
"teamCity": "亚特兰大",
"playYear": 1,
"jerseyNo": "10",
"teamNameEn": "Hawks",
"draft": 2018,
"displayNameEn": "Jaylen Adams",
"heightValue": 1.88,
"birthDayStr": "1996-05-04",
"position": "后卫",
"age": 23,
"playerId": "1629121"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "2",
"_score": 1.0,
"_source": {
"countryEn": "New Zealand",
"teamName": "雷霆",
"birthDay": 743140800000,
"country": "新西兰",
"teamCityEn": "Oklahoma City",
"code": "steven_adams",
"displayAffiliation": "Pittsburgh/New Zealand",
"displayName": "斯蒂文 亚当斯",
"schoolType": "College",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "120.2 公斤",
"teamCity": "俄克拉荷马城",
"playYear": 6,
"jerseyNo": "12",
"teamNameEn": "Thunder",
"draft": 2013,
"displayNameEn": "Steven Adams",
"heightValue": 2.13,
"birthDayStr": "1993-07-20",
"position": "中锋",
"age": 26,
"playerId": "203500"
}
},
{
"_index": "nba",
"_type": "_doc",
"_id": "3",
"_score": 1.0,
"_source": {
"countryEn": "United States",
"teamName": "热火",
"birthDay": 869198400000,
"country": "美国",
"teamCityEn": "Miami",
"code": "bam_adebayo",
"displayAffiliation": "Kentucky/United States",
"displayName": "巴姆 阿德巴约",
"schoolType": "College",
"teamConference": "东部",
"teamConferenceEn": "Eastern",
"weight": "115.7 公斤",
"teamCity": "迈阿密",
"playYear": 2,
"jerseyNo": "13",
"teamNameEn": "Heat",
"draft": 2017,
"displayNameEn": "Bam Adebayo",
"heightValue": 2.08,
"birthDayStr": "1997-07-18",
"position": "中锋-前锋",
"age": 22,
"playerId": "1628389"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查找在nba打了2年年到10年以内的球员
"query": {
"range": {
"playYear":{ //playYear 是Long类型 不要写成字符串
"gte": 2,
"lte" : 10
}
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 77,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "3",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "热火",
"birthDay" : 869198400000,
"country" : "美国",
"teamCityEn" : "Miami",
"code" : "bam_adebayo",
"displayAffiliation" : "Kentucky/United States",
"displayName" : "巴姆 阿德巴约",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "115.7 公斤",
"teamCity" : "迈阿密",
"playYear" : 2,
"jerseyNo" : "13",
"teamNameEn" : "Heat",
"draft" : 2017,
"displayNameEn" : "Bam Adebayo",
"heightValue" : 2.08,
"birthDayStr" : "1997-07-18",
"position" : "中锋-前锋",
"age" : 22,
"playerId" : "1628389"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "9",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "篮网",
"birthDay" : 893131200000,
"country" : "美国",
"teamCityEn" : "Brooklyn",
"code" : "jarrett_allen",
"displayAffiliation" : "Texas/United States",
"displayName" : "贾瑞特 艾伦",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "107.5 公斤",
"teamCity" : "布鲁克林",
"playYear" : 2,
"jerseyNo" : "31",
"teamNameEn" : "Nets",
"draft" : 2017,
"displayNameEn" : "Jarrett Allen",
"heightValue" : 2.11,
"birthDayStr" : "1998-04-21",
"position" : "中锋",
"age" : 21,
"playerId" : "1628386"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "10",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "尼克斯",
"birthDay" : 727074000000,
"country" : "美国",
"teamCityEn" : "New York",
"code" : "kadeem_allen",
"displayAffiliation" : "Arizona/United States",
"displayName" : "卡迪姆 艾伦",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "90.7 公斤",
"teamCity" : "纽约",
"playYear" : 2,
"jerseyNo" : "0",
"teamNameEn" : "Knicks",
"draft" : 2017,
"displayNameEn" : "Kadeem Allen",
"heightValue" : 1.9,
"birthDayStr" : "1993-01-15",
"position" : "后卫",
"age" : 26,
"playerId" : "1628443"
}
}
]
}
}
- 请求
- 请求体
{
// 语义: 查找1980年年到1999年年出⽣生的球员
"query": {
"range": {
"birthDay":{
"gte": "01/01/1999",
"lte" : "1999",,
"format": "dd/MM/yyyy||yyyy" // 日期格式要对应get lte
}
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 521,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "老鹰",
"birthDay" : 831182400000,
"country" : "美国",
"teamCityEn" : "Atlanta",
"code" : "jaylen_adams",
"displayAffiliation" : "United States",
"displayName" : "杰伦 亚当斯",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "86.2 公斤",
"teamCity" : "亚特兰大",
"playYear" : 1,
"jerseyNo" : "10",
"teamNameEn" : "Hawks",
"draft" : 2018,
"displayNameEn" : "Jaylen Adams",
"heightValue" : 1.88,
"birthDayStr" : "1996-05-04",
"position" : "后卫",
"age" : 23,
"playerId" : "1629121"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"countryEn" : "New Zealand",
"teamName" : "雷霆",
"birthDay" : 743140800000,
"country" : "新西兰",
"teamCityEn" : "Oklahoma City",
"code" : "steven_adams",
"displayAffiliation" : "Pittsburgh/New Zealand",
"displayName" : "斯蒂文 亚当斯",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "120.2 公斤",
"teamCity" : "俄克拉荷马城",
"playYear" : 6,
"jerseyNo" : "12",
"teamNameEn" : "Thunder",
"draft" : 2013,
"displayNameEn" : "Steven Adams",
"heightValue" : 2.13,
"birthDayStr" : "1993-07-20",
"position" : "中锋",
"age" : 26,
"playerId" : "203500"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "3",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "热火",
"birthDay" : 869198400000,
"country" : "美国",
"teamCityEn" : "Miami",
"code" : "bam_adebayo",
"displayAffiliation" : "Kentucky/United States",
"displayName" : "巴姆 阿德巴约",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "115.7 公斤",
"teamCity" : "迈阿密",
"playYear" : 2,
"jerseyNo" : "13",
"teamNameEn" : "Heat",
"draft" : 2017,
"displayNameEn" : "Bam Adebayo",
"heightValue" : 2.08,
"birthDayStr" : "1997-07-18",
"position" : "中锋-前锋",
"age" : 22,
"playerId" : "1628389"
}
}
]
}
}
| type | description |
|---|---|
| must | 必须出现在匹配文档中 |
| filter | 必须出现在文档中，但是不打分 |
| must_not | 不能出现在文档中 |
| should | 应该出现在文档中 |
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询名字叫做james的球员
"query": {
"bool": { // 布尔查询
"must":[ //匹配查询方式
{
"match": { // 全文搜索
"displayNameEn": "james"
}
}
]
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 4.699642,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "266",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "国王",
"birthDay" : 854082000000,
"country" : "美国",
"teamCityEn" : "Sacramento",
"code" : "justin_james",
"displayAffiliation" : "United States",
"displayName" : "贾斯汀 詹姆斯",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "86.2 公斤",
"teamCity" : "萨克拉门托",
"playYear" : 0,
"jerseyNo" : "",
"teamNameEn" : "Kings",
"draft" : 2019,
"displayNameEn" : "Justin James",
"heightValue" : 2.01,
"birthDayStr" : "1997-01-24",
"position" : "后卫-前锋",
"age" : 22,
"playerId" : "1629713"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "267",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "湖人",
"birthDay" : 473230800000,
"country" : "美国",
"teamCityEn" : "Los Angeles",
"code" : "lebron_james",
"displayAffiliation" : "No College/United States",
"displayName" : "勒布朗 詹姆斯",
"schoolType" : "High School",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "113.4 公斤",
"teamCity" : "洛杉矶",
"playYear" : 16,
"jerseyNo" : "23",
"teamNameEn" : "Lakers",
"draft" : 2003,
"displayNameEn" : "LeBron James",
"heightValue" : 2.03,
"birthDayStr" : "1984-12-30",
"position" : "前锋",
"age" : 35,
"playerId" : "2544"
}
}
]
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询名字叫做james的球员 不包含打分
"query": {
"bool": {
"filter":[
{
"match": {
"displayNameEn": "james"
}
}
]
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 0.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "158",
"_score" : 0.0, // 不包含打分
"_source" : {
"countryEn" : "United States",
"teamName" : "76人",
"birthDay" : 646804800000,
"country" : "美国",
"teamCityEn" : "Philadelphia",
"code" : "james_ennis iii",
"displayAffiliation" : "Cal State-Long Beach/United States",
"displayName" : "詹姆斯 恩尼斯三世",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "95.3 公斤",
"teamCity" : "费城",
"playYear" : 5,
"jerseyNo" : "11",
"teamNameEn" : "76ers",
"draft" : 2013,
"displayNameEn" : "James Ennis III",
"heightValue" : 2.01,
"birthDayStr" : "1990-07-01",
"position" : "前锋",
"age" : 29,
"playerId" : "203516"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "266",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "国王",
"birthDay" : 854082000000,
"country" : "美国",
"teamCityEn" : "Sacramento",
"code" : "justin_james",
"displayAffiliation" : "United States",
"displayName" : "贾斯汀 詹姆斯",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "86.2 公斤",
"teamCity" : "萨克拉门托",
"playYear" : 0,
"jerseyNo" : "",
"teamNameEn" : "Kings",
"draft" : 2019,
"displayNameEn" : "Justin James",
"heightValue" : 2.01,
"birthDayStr" : "1997-01-24",
"position" : "后卫-前锋",
"age" : 22,
"playerId" : "1629713"
}
}
]
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询名字叫做james的球员,一定不在东部的
"query": {
"bool": {
"filter":[
{
"match": {
"displayNameEn": "james"
}
}
],
"must_not": [
{
"term": {
"teamConferenceEn": {
"value": "eastern"
}
}
}
]
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 0.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "158",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "76人",
"birthDay" : 646804800000,
"country" : "美国",
"teamCityEn" : "Philadelphia",
"code" : "james_ennis iii",
"displayAffiliation" : "Cal State-Long Beach/United States",
"displayName" : "詹姆斯 恩尼斯三世",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "95.3 公斤",
"teamCity" : "费城",
"playYear" : 5,
"jerseyNo" : "11",
"teamNameEn" : "76ers",
"draft" : 2013,
"displayNameEn" : "James Ennis III",
"heightValue" : 2.01,
"birthDayStr" : "1990-07-01",
"position" : "前锋",
"age" : 29,
"playerId" : "203516"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "266",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "国王",
"birthDay" : 854082000000,
"country" : "美国",
"teamCityEn" : "Sacramento",
"code" : "justin_james",
"displayAffiliation" : "United States",
"displayName" : "贾斯汀 詹姆斯",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "86.2 公斤",
"teamCity" : "萨克拉门托",
"playYear" : 0,
"jerseyNo" : "",
"teamNameEn" : "Kings",
"draft" : 2019,
"displayNameEn" : "Justin James",
"heightValue" : 2.01,
"birthDayStr" : "1997-01-24",
"position" : "后卫-前锋",
"age" : 22,
"playerId" : "1629713"
}
}
]
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查找名字叫做james的打球时间应该在11到20年的西部球员
// should应该 但是不是必须
"query": {
"bool": {
"filter":[
{
"match": {
"displayNameEn": "james"
}
}
],
"must_not": [
{
"term": {
"teamConferenceEn": {
"value": "eastern"
}
}
}
],
"should": [
{
"range": {
"playYear": {
"gte": 11,
"lte": 20
}
}
}
]
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "267",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "湖人",
"birthDay" : 473230800000,
"country" : "美国",
"teamCityEn" : "Los Angeles",
"code" : "lebron_james",
"displayAffiliation" : "No College/United States",
"displayName" : "勒布朗 詹姆斯",
"schoolType" : "High School",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "113.4 公斤",
"teamCity" : "洛杉矶",
"playYear" : 16,
"jerseyNo" : "23",
"teamNameEn" : "Lakers",
"draft" : 2003,
"displayNameEn" : "LeBron James",
"heightValue" : 2.03,
"birthDayStr" : "1984-12-30",
"position" : "前锋",
"age" : 35,
"playerId" : "2544"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "158",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "76人",
"birthDay" : 646804800000,
"country" : "美国",
"teamCityEn" : "Philadelphia",
"code" : "james_ennis iii",
"displayAffiliation" : "Cal State-Long Beach/United States",
"displayName" : "詹姆斯 恩尼斯三世",
"schoolType" : "College",
"teamConference" : "东部",
"teamConferenceEn" : "Eastern",
"weight" : "95.3 公斤",
"teamCity" : "费城",
"playYear" : 5,
"jerseyNo" : "11",
"teamNameEn" : "76ers",
"draft" : 2013,
"displayNameEn" : "James Ennis III",
"heightValue" : 2.01,
"birthDayStr" : "1990-07-01",
"position" : "前锋",
"age" : 29,
"playerId" : "203516"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 0.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
}
]
}
}- 请求
- 请求体
{
// 语义: 查找名字叫做james的打球时间应该在11到20年的西部球员
// minimum_should_match = 1 最小匹配精度,至少有一个条件满足
"query": {
"bool": {
"filter":[
{
"match": {
"displayNameEn": "james"
}
}
],
"must_not": [
{
"term": {
"teamConferenceEn": {
"value": "eastern"
}
}
}
],
"should": [
{
"range": {
"playYear": {
"gte": 11,
"lte": 20
}
}
}
]
, "minimum_should_match": 1
}
},
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "267",
"_score" : 1.0,
"_source" : {
"countryEn" : "United States",
"teamName" : "湖人",
"birthDay" : 473230800000,
"country" : "美国",
"teamCityEn" : "Los Angeles",
"code" : "lebron_james",
"displayAffiliation" : "No College/United States",
"displayName" : "勒布朗 詹姆斯",
"schoolType" : "High School",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "113.4 公斤",
"teamCity" : "洛杉矶",
"playYear" : 16,
"jerseyNo" : "23",
"teamNameEn" : "Lakers",
"draft" : 2003,
"displayNameEn" : "LeBron James",
"heightValue" : 2.03,
"birthDayStr" : "1984-12-30",
"position" : "前锋",
"age" : 35,
"playerId" : "2544"
}
}
]
}
}- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: ⽕箭队中按打球时间从⼤到⼩排序的球员
"query": {
"match": {
"teamName": "Rockets"
}
},
"sort": [
{
"playYear": {
"order": "desc"
}
}
],
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "395",
"_score" : null,
"_source" : {
"countryEn" : "Brazil",
"teamName" : "火箭",
"birthDay" : 400737600000,
"country" : "巴西",
"teamCityEn" : "Houston",
"code" : "nene_hilario",
"displayAffiliation" : "Brazil",
"displayName" : "内内",
"schoolType" : "",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "113.4 公斤",
"teamCity" : "休斯顿",
"playYear" : 17,
"jerseyNo" : "42",
"teamNameEn" : "Rockets",
"draft" : 2002,
"displayNameEn" : "Nene",
"heightValue" : 2.11,
"birthDayStr" : "1982-09-13",
"position" : "中锋-前锋",
"age" : 37,
"playerId" : "2403"
},
"sort" : [
17
]
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "425",
"_score" : null,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 484200000000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "chris_paul",
"displayAffiliation" : "Wake Forest/United States",
"displayName" : "克里斯 保罗",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "79.4 公斤",
"teamCity" : "休斯顿",
"playYear" : 14,
"jerseyNo" : "3",
"teamNameEn" : "Rockets",
"draft" : 2005,
"displayNameEn" : "Chris Paul",
"heightValue" : 1.83,
"birthDayStr" : "1985-05-06",
"position" : "后卫",
"age" : 34,
"playerId" : "101108"
},
"sort" : [
14
]
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "206",
"_score" : null,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 507099600000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "gerald_green",
"displayAffiliation" : "No College/United States",
"displayName" : "杰拉德 格林",
"schoolType" : "High School",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "93.0 公斤",
"teamCity" : "休斯顿",
"playYear" : 12,
"jerseyNo" : "14",
"teamNameEn" : "Rockets",
"draft" : 2005,
"displayNameEn" : "Gerald Green",
"heightValue" : 2.01,
"birthDayStr" : "1986-01-26",
"position" : "后卫-前锋",
"age" : 33,
"playerId" : "101123"
},
"sort" : [
12
]
}
]
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: ⽕箭队中按打球时间从⼤到⼩，如果年龄相同则按照身⾼从⾼到低排序的球员
"query": {
"match": {
"teamNameEn": "Rockets"
}
},
"sort": [
{
"playYear": {
"order": "desc"
}
},
{
"heightValue": {
"order": "asc"
}
}
],
"from": 0,
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "395",
"_score" : null,
"_source" : {
"countryEn" : "Brazil",
"teamName" : "火箭",
"birthDay" : 400737600000,
"country" : "巴西",
"teamCityEn" : "Houston",
"code" : "nene_hilario",
"displayAffiliation" : "Brazil",
"displayName" : "内内",
"schoolType" : "",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "113.4 公斤",
"teamCity" : "休斯顿",
"playYear" : 17,
"jerseyNo" : "42",
"teamNameEn" : "Rockets",
"draft" : 2002,
"displayNameEn" : "Nene",
"heightValue" : 2.11,
"birthDayStr" : "1982-09-13",
"position" : "中锋-前锋",
"age" : 37,
"playerId" : "2403"
},
"sort" : [
17,
2.11
]
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "425",
"_score" : null,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 484200000000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "chris_paul",
"displayAffiliation" : "Wake Forest/United States",
"displayName" : "克里斯 保罗",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "79.4 公斤",
"teamCity" : "休斯顿",
"playYear" : 14,
"jerseyNo" : "3",
"teamNameEn" : "Rockets",
"draft" : 2005,
"displayNameEn" : "Chris Paul",
"heightValue" : 1.83,
"birthDayStr" : "1985-05-06",
"position" : "后卫",
"age" : 34,
"playerId" : "101108"
},
"sort" : [
14,
1.83
]
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "206",
"_score" : null,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 507099600000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "gerald_green",
"displayAffiliation" : "No College/United States",
"displayName" : "杰拉德 格林",
"schoolType" : "High School",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "93.0 公斤",
"teamCity" : "休斯顿",
"playYear" : 12,
"jerseyNo" : "14",
"teamNameEn" : "Rockets",
"draft" : 2005,
"displayNameEn" : "Gerald Green",
"heightValue" : 2.01,
"birthDayStr" : "1986-01-26",
"position" : "后卫-前锋",
"age" : 33,
"playerId" : "101123"
},
"sort" : [
12,
2.01
]
}
]
}
}- ES聚合分析是什么
-
聚合分析是数据库中重要的功能特性，完成对⼀个查询的数据集中数据的聚合计算，如：找出某字段（或计算表达式的结果）的最⼤值、最⼩值，计算和、平均值等。ES作为搜索引擎兼数据库，同样提供了强⼤的聚合分析能力。
-
对⼀个数据集求最大、最小、和、平均值等指标的聚合，在ES中称为指标聚合
-
而关系型数据库中除了有聚合函数外，还可以对查询出的数据行分组group by，再在组上进行指标聚合。在ES中称为桶聚合
-
max min sum avg 指标聚合
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询火箭队球员平均年龄
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": { // aggs 代表使用聚合函数
"avgAge": { // avgAge是自定义的，因为是查年年龄平均所以起名avgAge
"avg": { // avg 平均
"field": "age"
}
}
},
"size": 0 // 不看数据只看指标聚合
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"avgAge" : {
"value" : 26.761904761904763 // 平均年龄
}
}
}-
统计非空字段的文档数
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询火箭队中球员打球时间不为空的数量
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"countPlayerYear": {
"value_count": {
"field": "playYear"
}
}
},
"size": 0
}- 响应
{
"took" : 4,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"countPlayerYear" : {
"value" : 21
}
}
}-
查询火箭队有多少文档，也就是有多少球员
-
请求
localhost:9200/nba/_count- 请求体
{
"query": {
"term": {
"teamNameEn": "Rockets"
}
}
}- 响应
{
"count": 21,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
}
}-
Cardinality 值去重计算
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询火箭队中年龄不同的数量
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"countAge": { // 自定义名字
"cardinality": { // 去掉相同的只保留一个值
"field": "age"
}
}
},
"size": 0
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"countAge" : {
"value" : 13
}
}
}
-
stats 统计count max min avg sum 5个值
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查询火箭球员的年龄status
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"status": {
"stats": {
"field": "age"
}
}
},
"size": 0
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"status" : {
"count" : 21,
"min" : 21.0,
"max" : 37.0,
"avg" : 26.761904761904763,
"sum" : 562.0
}
}
}
-
Extended stats ⽐比stats多4个统计结果： 平⽅方和、⽅方差、标准差、平均值加减两个标准差的区间
-
请求
localhost:9200/nba/_search- 请求体
{
// 查出火箭队球员的年龄Extend stats
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"extendedStatsAge": {
"extended_stats": {
"field": "age"
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"extendedStatsAge" : {
"count" : 21,
"min" : 21.0,
"max" : 37.0,
"avg" : 26.761904761904763,
"sum" : 562.0,
"sum_of_squares" : 15534.0,
"variance" : 23.5147392290249,
"std_deviation" : 4.84919985451465,
"std_deviation_bounds" : {
"upper" : 36.46030447093406,
"lower" : 17.063505052875463
}
}
}
}
-
Percentiles 占比百分位对应的值统计，默认返回[ 1, 5, 25, 50, 75, 95, 99 ]分位上的值
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 查出火箭的球员的年龄占比
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"percentilesAge": {
"percentiles": {
"field": "age",
// 这里可以指定，不使用默认
// "percents": [
// 25,
// 50,
// 75
// ]
}
}
},
"size": 0
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"percentilesAge" : {
"values" : {
"1.0" : 21.0,
"5.0" : 21.0,
"25.0" : 22.75, // 小于22.75岁的 占25%
"50.0" : 25.0,
"75.0" : 30.25,// 小于30.25岁的 占75%
"95.0" : 35.349999999999994,
"99.0" : 37.0
}
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 火箭队根据年龄进行分组
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"aggrAge": {
"terms": { // 因为根据年龄做桶聚合所以使用terms
"field": "age",
"size": 3 // 指定显示桶数
}
}
},
"size": 0
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"aggrAge" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 3,
"buckets" : [
{
"key" : 21, // 指定的字段 age
"doc_count" : 4 // 21岁的文档数有4个
},
{
"key" : 25,
"doc_count" : 3
},
{
"key" : 23,
"doc_count" : 2
}
]
}
}
}
- 请求体
{
// 语义: 根据火箭队年龄进行分组，分组信息通过年龄从大到小排序（通过指定字段）
"query": {
"term": {
"teamNameEn": "Rockets"
}
},
"aggs": {
"aggrAge": {
"terms": {
"field": "age",
"size": 3,
"order": {
"_key": "desc" //"_key关键字 倒序排序
// "_count": "desc" 通过文档排序
}
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 21,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"aggrAge" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 17,
"buckets" : [
{
"key" : 37,
"doc_count" : 1
},
{
"key" : 34,
"doc_count" : 2
},
{
"key" : 33,
"doc_count" : 1
}
]
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 每支球队按该队所有球员的平均年龄进行分组排序（通过分组指标值）
"aggs": {
"aggsTeamName": {
"terms": { // 因为使用分组所以用terms
"field": "teamNameEn",
"size": 3, // 显示3条
"order": {
"avgAge": "desc"
}
}, // 因为需要通过对球队的平均年龄进行分组排序，所以再写aggs
"aggs": {
"avgAge": {
"avg": {
"field": "age"
}
}
}
}
},
"size": 0
}- 响应
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"aggsTeamName" : {
"doc_count_error_upper_bound" : -1,
"sum_other_doc_count" : 511,
"buckets" : [
{
"key" : "Bucks",
"doc_count" : 14,
"avgAge" : {
"value" : 28.142857142857142
}
},
{
"key" : "Mavericks",
"doc_count" : 20,
"avgAge" : {
"value" : 27.85
}
},
{
"key" : "Lakers",
"doc_count" : 21,
"avgAge" : {
"value" : 27.714285714285715
}
}
]
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 湖人和火箭队按球队平均年龄进行分组排序（指定值列表 ）
"aggs": {
"aggsTeamName": {
"terms": {
"field": "teamNameEn",
// include指定队伍 ["Lakes","Rockets","warriors"]
"include": ["Lakes","Rockets","warriors"],
// exclude去除["warriors"]
"exclude": ["warriors"],
"size": 3,
"order": {
"avgAge": "desc"
}
},
"aggs": {
"avgAge": {
"avg": {
"field": "age"
}
}
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"aggsTeamName" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets" : [
{
"key" : "Rockets",
"doc_count" : 21,
"avgAge" : {
"value" : 26.761904761904763
}
}
]
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 湖人和火箭队按球队平均年龄进行分组排序（指定值列表 ）
"aggs": {
"aggsTeamName": {
"terms": {
"field": "teamNameEn",
// 使用正则表达式
"include": "Lakers|Ro.*|Warriors.*",
"exclude": "warriors",
"size": 3,
"order": {
"avgAge": "desc"
}
},
"aggs": {
"avgAge": {
"avg": {
"field": "age"
}
}
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"aggsTeamName" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets" : [
{
"key" : "Lakers",
"doc_count" : 21,
"avgAge" : {
"value" : 27.714285714285715
}
},
{
"key" : "Rockets",
"doc_count" : 21,
"avgAge" : {
"value" : 26.761904761904763
}
},
{
"key" : "Warriors",
"doc_count" : 20,
"avgAge" : {
"value" : 26.25
}
}
]
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 球员年龄按20、20-35、35 这样分组
"aggs": {
"ageRange": {
"range": {
"field": "age",
"ranges": [
{
"to": 20, // 小于等于 20
"key": "A" //别名 A
},
{
"from": 20, // 大于等于20
"to": 35, // 小于等于 35
"key": "B" //别名 B
},
{
"from": 35, // 大于等于35
"key": "C" //别名 C
}
]
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"ageRange" : {
"buckets" : [
{
"key" : "A",
"to" : 20.0,
"doc_count" : 15
},
{
"key" : "B",
"from" : 20.0,
"to" : 35.0,
"doc_count" : 531
},
{
"key" : "C",
"from" : 35.0,
"doc_count" : 20
}
]
}
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 球员按出生年月分组
"aggs": {
"birthDayRange": {
"date_range": { // 时间类型
"field": "birthDay", // 生日 生日是时间类型
"format": "MM-yyy", //时间格式 月份年份
"ranges": [
{
"from": "01-1989" // 小于1989年1月出生
},
{
"from": "01-1989", // 1989年1月到1999年1月
"to": "01-1999"
},
{
"from": "01-1999", // 1999年1月到2009年1月
"to": "01-2009"
},
{
"from": "01-2009"
}
]
}
}
},
"size": 0
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"birthDayRange" : {
"buckets" : [
{
"key" : "01-1989-01-1999",
"from" : 5.99616E11,
"from_as_string" : "01-1989",
"to" : 9.151488E11,
"to_as_string" : "01-1999",
"doc_count" : 426
},
{
"key" : "01-1989-*",
"from" : 5.99616E11,
"from_as_string" : "01-1989",
"doc_count" : 469
},
{
"key" : "01-1999-01-2009",
"from" : 9.151488E11,
"from_as_string" : "01-1999",
"to" : 1.230768E12,
"to_as_string" : "01-2009",
"doc_count" : 43
},
{
"key" : "01-2009-*",
"from" : 1.230768E12,
"from_as_string" : "01-2009",
"doc_count" : 0
}
]
}
}
}
-
按天、月、年等进行聚合统计。可按 year (1y), quarter (1q), month (1M), week (1w), day (1d), hour (1h), minute (1m), second (1s) 间隔聚合
-
请求
localhost:9200/nba/_search- 请求体
{
// 语义: 球员按出⽣生年年分组
"aggs": {
"birthday_aggs": {
"date_histogram": {
"field": "birthDay", //生日字段
"format": "yyyy", // 时间格式
"calendar_interval": "year" // 根据年
}
}
},
"size": 0
}- 响应
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 566,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"birthday_aggs" : {
"buckets" : [
{
"key_as_string" : "1977",
"key" : 220924800000,
"doc_count" : 1
},
{
"key_as_string" : "1978",
"key" : 252460800000,
"doc_count" : 1
},
{
"key_as_string" : "1979",
"key" : 283996800000,
"doc_count" : 0
},
{
"key_as_string" : "1980",
"key" : 315532800000,
"doc_count" : 3
},
{
"key_as_string" : "1981",
"key" : 347155200000,
"doc_count" : 2
},
{
"key_as_string" : "1982",
"key" : 378691200000,
"doc_count" : 3
},
{
"key_as_string" : "1983",
"key" : 410227200000,
"doc_count" : 2
},
{
"key_as_string" : "1984",
"key" : 441763200000,
"doc_count" : 8
},
{
"key_as_string" : "1985",
"key" : 473385600000,
"doc_count" : 15
},
{
"key_as_string" : "1986",
"key" : 504921600000,
"doc_count" : 19
},
{
"key_as_string" : "1987",
"key" : 536457600000,
"doc_count" : 16
},
{
"key_as_string" : "1988",
"key" : 567993600000,
"doc_count" : 27
},
{
"key_as_string" : "1989",
"key" : 599616000000,
"doc_count" : 24
},
{
"key_as_string" : "1990",
"key" : 631152000000,
"doc_count" : 35
},
{
"key_as_string" : "1991",
"key" : 662688000000,
"doc_count" : 31
},
{
"key_as_string" : "1992",
"key" : 694224000000,
"doc_count" : 36
},
{
"key_as_string" : "1993",
"key" : 725846400000,
"doc_count" : 46
},
{
"key_as_string" : "1994",
"key" : 757382400000,
"doc_count" : 45
},
{
"key_as_string" : "1995",
"key" : 788918400000,
"doc_count" : 57
},
{
"key_as_string" : "1996",
"key" : 820454400000,
"doc_count" : 56
},
{
"key_as_string" : "1997",
"key" : 852076800000,
"doc_count" : 57
},
{
"key_as_string" : "1998",
"key" : 883612800000,
"doc_count" : 39
},
{
"key_as_string" : "1999",
"key" : 915148800000,
"doc_count" : 28
},
{
"key_as_string" : "2000",
"key" : 946684800000,
"doc_count" : 15
}
]
}
}
}
- query_string 查询，如果熟悉lucene的查询语法，我们可以直接⽤用lucene查询语法写⼀一个查询串进行查询，ES中接到请求后，通过查询解析器 ,解析查询串生成对应的查询。
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 指定单个字段查询（查询詹姆斯或者库里的球员）
"query": {
"query_string": {
"default_field": "displayNameEn",
"query": "james OR curry" // 这里可以使用or或and也就是sql里的or和and
// "query": "james AND curry"
}
},
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 7,
"relation" : "eq"
},
"max_score" : 5.4989905,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "123",
"_score" : 5.4989905,
"_source" : {
"countryEn" : "United States",
"teamName" : "独行侠",
"birthDay" : 651384000000,
"country" : "美国",
"teamCityEn" : "Dallas",
"code" : "seth_curry",
"displayAffiliation" : "Duke/United States",
"displayName" : "賽斯 库里",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "83.9 公斤",
"teamCity" : "达拉斯",
"playYear" : 6,
"jerseyNo" : "30",
"teamNameEn" : "Mavericks",
"draft" : 2013,
"displayNameEn" : "Seth Curry",
"heightValue" : 1.88,
"birthDayStr" : "1990-08-23",
"position" : "后卫",
"age" : 29,
"playerId" : "203552"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "124",
"_score" : 5.4989905,
"_source" : {
"countryEn" : "United States",
"teamName" : "勇士",
"birthDay" : 574318800000,
"country" : "美国",
"teamCityEn" : "Golden State",
"code" : "stephen_curry",
"displayAffiliation" : "Davidson/United States",
"displayName" : "斯蒂芬 库里",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "86.2 公斤",
"teamCity" : "金州",
"playYear" : 10,
"jerseyNo" : "30",
"teamNameEn" : "Warriors",
"draft" : 2009,
"displayNameEn" : "Stephen Curry",
"heightValue" : 1.9,
"birthDayStr" : "1988-03-14",
"position" : "后卫",
"age" : 31,
"playerId" : "201939"
}
},
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
}
]
}
}
- 请求
localhost:9200/nba/_search- 请求体
{
// 语义: 指定多个字段查询（查询詹姆斯或者库里的球员）
"query": {
"query_string": {
"fields": [ // 指定多个字段
"displayNameEn",
"teamNameEn"
],
"query": "james AND Rockets" // 查询条件
}
},
"size": 3
}- 响应
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 7.9719486,
"hits" : [
{
"_index" : "nba",
"_type" : "_doc",
"_id" : "214",
"_score" : 7.9719486,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
}
}
]
}
}
- 在开发中，随着业务需求的迭代，较老的业务逻辑就要面临更新甚至是重构，而对于es来说，为了了适应新的业务逻辑，可能就要对原有的索引做一些修改，比如对某些字段做调整，甚至是重建索引。而做这些操作的时候，可能会对业务造成影响，甚至是停机调整等问题。由此，es提供了索引别名来解决这些问题。 索引别名就像一个快捷方式或是软连接，可以指向一个或多个索引，也可以给任意一个需要索引名的API来使⽤用。别名的应用为程序提供了极大地灵活性
- 请求
localhost:9200/nba/_alias // 查询nba别名
localhost:9200/_aliases // 查询所有别名- 响应
{
// 语义: 查看所有别名
"nba": {
"aliases": {}
},
".kibana_task_manager": {
"aliases": {}
},
".kibana_1": {
"aliases": {
".kibana": {}
}
}
}- 请求
localhost:9200/_aliases- 请求体
{
// 语义: nba 新建别名nba_v1.0
"actions": [
{
"add": {
"index": "nba",
"alias": "nba_v1.0"
}
}
]
}- 响应
{
"acknowledged": true
}- 请求
localhost:9200/_aliases- 请求体
{
// 语义: 删除nba的nba_v1.0别名
"actions": [
{
"remove": {
"index": "nba",
"alias": "nba_v1.0"
}
}
]
}- 响应
{
"acknowledged": true
}- 请求
localhost:9200/_aliases- 请求体
{
// 先删除nba_v1.0 别名 在新增 nba_v2.0别名,即是重命名
"actions": [
{
"remove": {
"index": "nba",
"alias": "nba_v1.0"
}
},
{
"add": {
"index": "nba",
"alias": "nba_v2.0"
}
}
]
}- 响应
{
"acknowledged": true
}- 请求
localhost:9200/nba_v2.0- 响应
{
"nba": {
"aliases": {
"nba_v2.0": {}
},
"mappings": {
"properties": {
"age": {
"type": "integer"
},
"birthDay": {
"type": "date"
},
"birthDayStr": {
"type": "keyword"
},
"code": {
"type": "text"
},
"country": {
"type": "text"
},
"countryEn": {
"type": "text"
},
"displayAffiliation": {
"type": "text"
},
"displayName": {
"type": "text"
},
"displayNameEn": {
"type": "text"
},
"draft": {
"type": "long"
},
"heightValue": {
"type": "float"
},
"jerseyNo": {
"type": "text"
},
"playYear": {
"type": "long"
},
"playerId": {
"type": "keyword"
},
"position": {
"type": "text"
},
"schoolType": {
"type": "text"
},
"teamCity": {
"type": "text"
},
"teamCityEn": {
"type": "text"
},
"teamConference": {
"type": "keyword"
},
"teamConferenceEn": {
"type": "keyword"
},
"teamName": {
"type": "keyword"
},
"teamNameEn": {
"type": "keyword"
},
"weight": {
"type": "text"
}
}
},
"settings": {
"index": {
"creation_date": "1573300240575",
"number_of_shards": "1",
"number_of_replicas": "1",
"uuid": "X7FLu-8sRcijAYKUkgBZQQ",
"version": {
"created": "7020199"
},
"provided_name": "nba"
}
}
}
}-
当别名指定了一个索引，则可以做写的操作
-
请求
localhost:9200/nba_v2.0/_doc/566- 请求体
{
// 语义: 通过别名nba_v2.0 修改id为566的球员
"countryEn": "Croatia",
"teamName": "快船",
"birthDay": 858661200000,
"country": "克罗地亚",
"teamCityEn": "LA",
"code": "ivica_zubac",
"displayAffiliation": "Croatia",
"displayName": "伊维察 祖巴茨哥哥", //"伊维察 祖巴茨"修改为"伊维察 祖巴茨哥哥"
"schoolType": "",
"teamConference": "西部",
"teamConferenceEn": "Western",
"weight": "108.9 公斤",
"teamCity": "洛杉矶",
"playYear": 3,
"jerseyNo": "40",
"teamNameEn": "Clippers",
"draft": 2016,
"displayNameEn": "Ivica Zubac",
"heightValue": 2.16,
"birthDayStr": "1997-03-18",
"position": "中锋",
"age": 22,
"playerId": "1627826"
}- 响应
{
"_index": "nba",
"_type": "_doc",
"_id": "566",
"_version": 2,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 566,
"_primary_term": 1
}-
Elasticsearch是⼀一个实时的分布式搜索引擎，为用户提供搜索服务，当我们决定存储某种数据时，在创建索引的时候需要将数据结构完整确定下来，于此同时索引的设定和很多固定配置将用不能改变。当需要改变数据结构时，就需要重新建立索引，为此，Elastic团队提供了很多辅助工具帮助开发人员进行重建索引
-
步骤
- nba取一个别名nba_latest, nba_latest作为对外使用
- POST 请求
localhost:9200/_aliases- 请求体
{
"actions": [
{
"add": {
"index": "nba",
"alias": "nba_latest"
}
}
]
}- 响应
{
"acknowledged" : true
}
- 新增一个索引nba_20220101，结构复制于nba索引，根据业务要求修改字段
- PUT 请求
localhost:9200/nba_20220101- 请求体
{
"mappings": {
"properties": {
"age": {
"type": "integer"
},
"birthDay": {
"type": "date"
},
"birthDayStr": {
"type": "keyword"
},
"code": {
"type": "text"
},
"country": {
"type": "keyword"
},
"countryEn": {
"type": "keyword"
},
"displayAffiliation": {
"type": "text"
},
"displayName": {
"type": "text"
},
"displayNameEn": {
"type": "text"
},
"draft": {
"type": "long"
},
"heightValue": {
"type": "float"
},
"jerseyNo": {
"type": "keyword"
},
"playYear": {
"type": "long"
},
"playerId": {
"type": "keyword"
},
"position": {
"type": "text"
},
"schoolType": {
"type": "text"
},
"teamCity": {
"type": "text"
},
"teamCityEn": {
"type": "text"
},
"teamConference": {
"type": "keyword"
},
"teamConferenceEn": {
"type": "keyword"
},
"teamName": {
"type": "keyword"
},
"teamNameEn": {
"type": "keyword"
},
"weight": {
"type": "text"
}
}
}
}- 响应
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "nba_20220101"
}- 将nba数据同步到nba_20220101
- POST 请求
localhost:9200/_reindex //同步请求 等待响应
localhost:9200/_reindex?wait_for_completion=false // 异步请求 直接返回- 请求体
{
"source": {
"index": "nba"
},
"dest": {
"index": "nba_20220101"
}
}- 响应
{
"took" : 102,
"timed_out" : false,
"total" : 566,
"updated" : 0,
"created" : 566,
"deleted" : 0,
"batches" : 1,
"version_conflicts" : 0,
"noops" : 0,
"retries" : {
"bulk" : 0,
"search" : 0
},
"throttled_millis" : 0,
"requests_per_second" : -1.0,
"throttled_until_millis" : 0,
"failures" : [ ]
}
- 给nba_20220101添加别名nba_latest，删除nba别名nba_latest
- POST请求
localhost:9200/_aliases- 请求体
{
"actions": [
{
"add": {
"index": "nba_20220101",
"alias": "nba_latest"
}
}
]
}- 响应
{
"acknowledged" : true
}
- 删除nba索引
- DELETE请求
localhost:9200/nba- 响应
{
"acknowledged" : true
}- 理想的搜索
-
新的数据一添加到索引中立马就能搜索到，但是真实情况不是这样的
-
我们使⽤用链式命令请求，先添加⼀一个⽂文档，再⽴立刻搜索
curl -X PUT localhost:9200/star/_doc/888 -H 'Content-Type:
application/json' -d '{ "displayName": "蔡徐坤" }'
curl -X GET localhost:9200/star/_doc/_search?pretty- 强制刷新
curl -X PUT localhost:9200/star/_doc/666?refresh -H 'Content-Type:
application/json' -d '{ "displayName": "杨超越" }'
curl -X GET localhost:9200/star/_doc/_search?pretty- 修改默认更更新时间(默认时间是1s)
- PUT 请求
localhost:9200/star/_settings- 请求体
{
"index":{
"refresh_interval": "5s"
}
}- 响应
{
"acknowledged" : true
}- 将refresh关闭
- PUT 请求
localhost:9200/star/_settings- 请求体
{
"index":{
"refresh_interval": "-1"
}
}- 响应
{
"acknowledged" : true
}-
如果返回的结果集中很多符合条件的结果，那怎么能一眼就能看到我们想要的那个结果呢？比如，我们搜索苍井空 ，在结果集中，将所有苍井空 高亮显示？
-
请求
localhost:9200/nba_latest/_search- 请求体
{
// 语义: 查找NBA james球员，对james做高亮显示
"query": {
"match": {
"displayNameEn": "james"
}
},
"highlight": { // 高亮关键字
"fields": { // 对displayNameEn做高亮
"displayNameEn": {}
}
},
"size": 2
}
// 也可以自定义标签
{
"query": {
"match": {
"displayNameEn": "james"
}
},
"highlight": {
"fields": {
"displayNameEn": {
// 定义高亮标签为 h1
"pre_tags": ["<h1>"],
"post_tags": ["</h1>"]
}
}
},
"size": 2
}- 响应
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 4.699642,
"hits" : [
{
"_index" : "nba_20220101",
"_type" : "_doc",
"_id" : "214",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "火箭",
"birthDay" : 620107200000,
"country" : "美国",
"teamCityEn" : "Houston",
"code" : "james_harden",
"displayAffiliation" : "Arizona State/United States",
"displayName" : "詹姆斯 哈登",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "99.8 公斤",
"teamCity" : "休斯顿",
"playYear" : 10,
"jerseyNo" : "13",
"teamNameEn" : "Rockets",
"draft" : 2009,
"displayNameEn" : "James Harden",
"heightValue" : 1.96,
"birthDayStr" : "1989-08-26",
"position" : "后卫",
"age" : 30,
"playerId" : "201935"
},
"highlight" : {
// "<em> 包裹起来是 高亮的意思
"displayNameEn" : [
"<em>James</em> Harden"
]
}
},
{
"_index" : "nba_20220101",
"_type" : "_doc",
"_id" : "266",
"_score" : 4.699642,
"_source" : {
"countryEn" : "United States",
"teamName" : "国王",
"birthDay" : 854082000000,
"country" : "美国",
"teamCityEn" : "Sacramento",
"code" : "justin_james",
"displayAffiliation" : "United States",
"displayName" : "贾斯汀 詹姆斯",
"schoolType" : "College",
"teamConference" : "西部",
"teamConferenceEn" : "Western",
"weight" : "86.2 公斤",
"teamCity" : "萨克拉门托",
"playYear" : 0,
"jerseyNo" : "",
"teamNameEn" : "Kings",
"draft" : 2019,
"displayNameEn" : "Justin James",
"heightValue" : 2.01,
"birthDayStr" : "1997-01-24",
"position" : "后卫-前锋",
"age" : 22,
"playerId" : "1629713"
},
"highlight" : {
// "<em> 包裹起来是 高亮的意思
"displayNameEn" : [
"Justin <em>James</em>"
]
}
}
]
}
}
- 查询建议是什么
- 查询建议，是为了给用户提供更好的搜索体验。包括：词条检查，自动补全
- Suggester
- Term suggester
- Phrase suggester
- Completion suggester
| text | 指定搜索文本 |
|---|---|
| field | 获取建议词的搜索字段 |
| analyzer | 指定分词器 |
| size | 每个词返回的最大建议词数 |
| sort | 如何对建议词进行排序，可用选项:score:先按评分排序、再按文档频率排、term顺序；frequency:先按文档频率排，再按评分、term顺序排。 |
| suggest_mode | 建议模式，控制提供建议词的方式：missing:仅在搜索的词项在索引中不存在时才提供建议词，默认值；popular:仅建议文档频率比搜索词项高的词；always：总是提供匹配的建议词 |
-
term 词条建议器 ，对给输入的文本进行分词，为每个分词提供词项建议
-
请求
localhost:9200/nba_latest/_search- 请求体
{
"suggest": {
"my-suggest": {
"text": "jamse", //用户可能输入错误 jsmes写成jamse
"term": {
"suggest_mode": "missing",
"field": "displayNameEn"
}
}
}
}- 响应
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"suggest" : {
"my-suggest" : [
{
"text" : "jamse",
"offset" : 0,
"length" : 5,
"options" : [
{
"text" : "james",
"score" : 0.8,
"freq" : 5
},
{
"text" : "jamal",
"score" : 0.6,
"freq" : 2
},
{
"text" : "jake",
"score" : 0.5,
"freq" : 1
},
{
"text" : "jose",
"score" : 0.5,
"freq" : 1
}
]
},
{
"text" : "hardne",
"offset" : 6,
"length" : 6,
"options" : [
{
"text" : "harden",
"score" : 0.8333333,
"freq" : 1
}
]
}
]
}
}
-
phrase 短语建议，在term的基础上，会考量多个term之间的关系，比如是否同时出现在索引的原文⾥里，相邻程度，以及词频等
-
请求
localhost:9200/nba_latest/_search- 请求体
{
"suggest": {
"my-suggest": {
"text": "jamse hardne",
"phrase": { // 词组 对单词进行联系
"field": "displayNameEn"
}
}
}
}- 响应
{
"took" : 26,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"suggest" : {
"my-suggest" : [
{
"text" : "jamse hardne",
"offset" : 0,
"length" : 12,
"options" : [
{
"text" : "james hardne",
"score" : 0.0025682184
},
{
"text" : "jamal hardne",
"score" : 0.0016773979
},
{
"text" : "jamse harden",
"score" : 0.0016222595
},
{
"text" : "jake hardne",
"score" : 0.001299489
},
{
"text" : "jose hardne",
"score" : 0.001299489
}
]
}
]
}
}
-
Completion 完成建议
-
请求
localhost:9200/nba_latest/_search- 请求体
{
"suggest": {
"my-suggest": {
"text": "Miam",
"completion":{
"field": "teamCityEn"
}
}
}
}- 官方网站
https://china.nba.com/playerindex/
- springboot 整合 elasticsearch 和 mysql
<!-- elasticsearch-rest-high-level-client -->
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.2.1</version>
</dependency>
<!-- elasticsearch -->
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>7.2.1</version>
</dependency>elasticsearch:
host: localhost
port: 9200package com.frame.elasticsearch.config;
import lombok.Data;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
/**
* ElasticSearch配置文件
* Es7使用RestHighLevelClient操作ES
*/
@SpringBootConfiguration
@ConfigurationProperties(prefix = "elasticsearch")
@Data
public class ElasticSearchConfig {
private String host;
private Integer port;
/**
* 创建RestHighLevelClient 实例
*/
@Bean
public RestHighLevelClient restHighLevelClient() {
HttpHost http = new HttpHost(host, port, "http");
return new RestHighLevelClient(RestClient.builder(http));
}
}- 对象转Map工具类
import org.springframework.cglib.beans.BeanMap;
import java.util.HashMap;
import java.util.Map;
public class BeanUtils {
/**
* 对象转为Map
*/
public static <T> Map<String, Object> beanToMap(T bean) {
HashMap<String, Object> map = new HashMap<>();
if (bean != null) {
BeanMap beanMap = BeanMap.create(bean);
for (Object o : beanMap.keySet()) {
if (beanMap.get(o) != null) {
map.put(o.toString(), beanMap.get(o));
}
}
}
return map;
}
}- CRUD 实现方法
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.frame.common.entity.NbaPlayer;
import com.frame.common.utils.BeanUtils;
import com.frame.elasticsearch.mapper.NbaPlayerMapper;
import com.frame.elasticsearch.service.NbaPlayerService;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.reindex.BulkByScrollResponse;
import org.elasticsearch.index.reindex.DeleteByQueryRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.util.Map;
/**
* <p>
* 服务实现类
* </p>
*
* @author Crazy.X
* @since 2019-11-10
*/
@Service
public class NbaPlayerServiceImpl implements NbaPlayerService {
/* ES索引 */
private final String NBA_INDEX = "nba_latest";
@Autowired
private RestHighLevelClient restHighLevelClient;
/**
* 添加一条文档
*/
@Override
public boolean addPlayer(NbaPlayer player, String id) throws IOException {
// 获取 IndexRequest
IndexRequest request = new IndexRequest(NBA_INDEX)
.id(id)
.source(BeanUtils.beanToMap(player));
// 获取 IndexResponse
IndexResponse response = restHighLevelClient.index(request, RequestOptions.DEFAULT);
System.out.println(JSON.toJSONString(response));
return false;
}
/**
* 获取一条文档
*/
@Override
public Map<String, Object> getPlayer(String id) throws IOException {
// 获取 GetRequest
GetRequest getRequest = new GetRequest(NBA_INDEX, id);
// 获取 GetResponse
GetResponse getResponse = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
// 返回结果
return getResponse.getSource();
}
/**
* 更新一条文档
*/
@Override
public boolean updatePlayer(NbaPlayer nbaPlayer, String id) throws IOException {
// 获取 UpdateRequest
UpdateRequest updateRequest = new UpdateRequest(NBA_INDEX, id)
.doc(BeanUtils.beanToMap(nbaPlayer));
// 获取 UpdateResponse
UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
System.out.println(JSON.toJSONString(update));
return true;
}
/**
* 删除一条文档
*/
@Override
public boolean deletePlayer(String id) throws IOException {
// 获取 DeleteRequest
DeleteRequest deleteRequest = new DeleteRequest(NBA_INDEX, id).id(id);
// 获取 DeleteResponse
DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
System.out.println(delete);
return true;
}
/**
* 删除所有文档
* 先查询所所有在进行删除
*/
@Override
public boolean deleteAllPlayer() throws IOException {
// 获取 deleteByQueryRequest
DeleteByQueryRequest deleteByQueryRequest = new DeleteByQueryRequest(NBA_INDEX);
// 获取 BulkByScrollResponse
BulkByScrollResponse bulkByScrollResponse = restHighLevelClient.deleteByQuery(
deleteByQueryRequest,
RequestOptions.DEFAULT
);
return true;
}
}- CRUD 测试类
import com.frame.common.entity.NbaPlayer;
import com.frame.elasticsearch.service.NbaPlayerService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.io.IOException;
import java.util.Map;
@RunWith(SpringRunner.class)
@SpringBootTest
public class NbaPlayerServiceImplTest {
@Autowired
NbaPlayerService nbaPlayerService;
@Test
public void addPlayer() throws IOException {
NbaPlayer nbaPlayer = new NbaPlayer()
.setId(999)
.setDisplayName("苍井空");
boolean result = nbaPlayerService.addPlayer(nbaPlayer, "999");
}
@Test
public void getPlayer() throws IOException {
Map<String, Object> player = nbaPlayerService.getPlayer("999");
System.out.println(player);
}
@Test
public void updatePlayer() throws IOException {
NbaPlayer nbaPlayer = new NbaPlayer()
.setId(999)
.setDisplayName("小泽玛利亚");
boolean result = nbaPlayerService.updatePlayer(nbaPlayer, "999");
}
@Test
public void deletePlayer() throws IOException {
boolean result = nbaPlayerService.deletePlayer("999");
}
@Test
public void deleteAllPlayer() throws IOException {
boolean result = nbaPlayerService.deleteAllPlayer();
}
}- Result结果集Vo
import com.frame.common.enums.ResultEnum;
import lombok.AllArgsConstructor;
import lombok.Data;
/**
* 结果封装Vo
*/
@Data
@AllArgsConstructor
public class Result<T> {
private Integer code;
private String msg;
private T data;
public static <T> Result success() {
return success(null);
}
public static <T> Result success(T data) {
return success(ResultEnum.SUCCESS.getCode(), data);
}
public static <T> Result success(Integer code, T data) {
return success(code, ResultEnum.SUCCESS.getMsg(), data);
}
public static <T> Result success(String msg, T data) {
return success(ResultEnum.SUCCESS.getCode(), msg, data);
}
public static <T> Result success(Integer code, String msg, T data) {
return new Result<T>(code, msg, data);
}
public static <T> Result fail() {
return fail(ResultEnum.FAIL.getCode());
}
public static <T> Result fail(Integer code) {
return fail(code, ResultEnum.FAIL.getMsg());
}
public static <T> Result fail(String msg) {
return fail(ResultEnum.FAIL.getCode(), msg);
}
public static <T> Result fail(Integer code, String msg) {
return success(code, msg, null);
}
}- 结果集对应的枚举
import lombok.AllArgsConstructor;
import lombok.Getter;
/**
* Result结果集枚举类
*/
@Getter
@AllArgsConstructor
public enum ResultEnum {
SUCCESS(200, "操作成功"),
FAIL(400,"操作失败")
;
private Integer code;
private String msg;
}- controller层
/**
* 从mysql导入数据到es
*/
@GetMapping("/import")
public Result importAllPlayer() {
try {
nbaPlayerService.importAllPlayer();
return Result.success("数据导入成功");
} catch (IOException e) {
log.error("ElasticSearch导入数据失败");
e.printStackTrace();
return Result.fail("ElasticSearch导入数据失败");
}
}- service层
/**
* 从mysql导入数据到es
*/
@Override
@Transactional
public boolean importAllPlayer() throws IOException {
// 查询所有数据,这里使用MybatisPlus不作解释
List<NbaPlayer> nbaPlayers = list();
for (NbaPlayer e : nbaPlayers) {
// 此处调用的增加文档方法
addPlayer(e, String.valueOf(e.getId()));
}
return true;
}- controller层
/**
* 通过姓名查找球员
*/
@GetMapping("/searchMatch")
public Result searchMatch(@RequestParam("key") String key,
@RequestParam("val") String val,
@RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
@RequestParam(value = "limit", required = false, defaultValue = "10") Integer limit) {
List<NbaPlayer> nbaPlayers = null;
try {
nbaPlayers = nbaPlayerService.searchTerm(key, val, page, limit);
} catch (IOException e) {
log.error("searchMatch失败,参数[key={}]][val={}]]", key, val);
e.printStackTrace();
}
return Result.success(nbaPlayers);
}- service层
/**
* 通过姓名查找球员
*/
@Override
public List<NbaPlayer> searchMatch(String key, String val, Integer page, Integer limit) throws IOException {
// 获取 SearchRequest
SearchRequest searchRequest = new SearchRequest(NBA_INDEX);
// 创建 SearchSourceBuilder 用于查询语句
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder
// 查询 通过match查询 key 字段名称 val 字段值
.query(QueryBuilders.termQuery(key, val))
// 起始页
.from(page)
// 显示条数
.size(limit);
// 设置 请求源 理解为设置查询语句
searchRequest.source(searchSourceBuilder);
// 获取 SearchResponse 查询数据
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 获取碰撞之后的结果 (固定写法)
SearchHit[] hits = searchResponse.getHits().getHits();
// 进行对象转换并返回
return Stream.of(hits)
.map(e -> JSON.parseObject(e.getSourceAsString(), NbaPlayer.class))
.collect(Collectors.toList());
}- controller层
/**
* 通过国家或者球队查询球员
*/
@GetMapping("/searchTerm")
public Result searchTerm(@RequestParam(value = "country", required = false) String country,
@RequestParam(value = "teamName", required = false) String teamName,
@RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
@RequestParam(value = "limit", required = false, defaultValue = "10") Integer limit) {
List<NbaPlayer> nbaPlayers = null;
try {
// 路由选择国家 或者 球队
if (StringUtils.isNotBlank(country)) {
nbaPlayers = nbaPlayerService.searchTerm("country", country, page, limit);
} else {
nbaPlayers = nbaPlayerService.searchTerm("teamName", teamName, page, limit);
}
} catch (IOException e) {
log.error("searchTerm失败,参数[country={}]][teamName={}]]", country, teamName);
e.printStackTrace();
}
return CollectionUtils.isNotEmpty(nbaPlayers) ? Result.success(nbaPlayers) : Result.success();
}- service层
/**
* 通过国家或者球队查询球员
*/
@Override
public List<NbaPlayer> searchTerm(String key, String val, Integer page, Integer limit) throws IOException {
// 获取 SearchRequest
SearchRequest searchRequest = new SearchRequest(NBA_INDEX);
// 创建 SearchSourceBuilder 用于查询语句
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder
// 查询 通过match查询 key 字段名称 val 字段值
.query(QueryBuilders.termQuery(key, val))
// 起始页
.from(page)
// 显示条数
.size(limit);
// 设置 请求源 理解为设置查询语句
searchRequest.source(searchSourceBuilder);
// 获取 SearchResponse 查询数据
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 获取碰撞之后的结果 (固定写法)
SearchHit[] hits = searchResponse.getHits().getHits();
// 进行对象转换并返回
return Stream.of(hits)
.map(e -> JSON.parseObject(e.getSourceAsString(), NbaPlayer.class))
.collect(Collectors.toList());
}- controller层
/**
* 通过姓名字母查找球员
*/
@GetMapping("/searchPrefix")
public Result searchPrefix(@RequestParam(value = "prefix", required = false, defaultValue = "A") String prefix,
@RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
@RequestParam(value = "limit", required = false, defaultValue = "10") Integer limit) {
List<NbaPlayer> nbaPlayers = null;
try {
nbaPlayers = nbaPlayerService.searchPrefix(prefix, page, limit);
} catch (IOException e) {
log.error("searchPrefix失败,参数[prefix={}]]", prefix);
e.printStackTrace();
}
return CollectionUtils.isNotEmpty(nbaPlayers) ? Result.success(nbaPlayers) : Result.success();
}- service层
/**
* 通过姓名字母查找球员
*/
@Override
public List<NbaPlayer> searchPrefix(String prefix, Integer page, Integer limit) throws IOException {
// 获取 SearchRequest
SearchRequest searchRequest = new SearchRequest(NBA_INDEX);
// 创建 SearchSourceBuilder 用于查询语句
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder
// 查询 通过prefix查询 displayNameEn.keyword 名字字段 prefix 前缀字母
.query(QueryBuilders.prefixQuery("displayNameEn.keyword", prefix))
// 起始页
.from(page)
// 显示条数
.size(limit);
// 设置 请求源 理解为设置查询语句
searchRequest.source(searchSourceBuilder);
// 获取 SearchResponse 查询数据
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// 获取碰撞之后的结果 (固定写法)
SearchHit[] hits = searchResponse.getHits().getHits();
// 进行对象转换并返回
return Stream.of(hits)
.map(e -> JSON.parseObject(e.getSourceAsString(), NbaPlayer.class))
.collect(Collectors.toList());
}- 请求
- 请求体
- 响应