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EsSearchServiceImpl.java
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EsSearchServiceImpl.java
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package io.github.xxyopen.novel.service.impl;
import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch._types.SortOrder;
import co.elastic.clients.elasticsearch._types.query_dsl.BoolQuery;
import co.elastic.clients.elasticsearch._types.query_dsl.RangeQuery;
import co.elastic.clients.elasticsearch._types.query_dsl.TermQuery;
import co.elastic.clients.elasticsearch.core.SearchRequest;
import co.elastic.clients.elasticsearch.core.SearchResponse;
import co.elastic.clients.elasticsearch.core.search.Hit;
import co.elastic.clients.elasticsearch.core.search.TotalHits;
import co.elastic.clients.json.JsonData;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import io.github.xxyopen.novel.core.common.resp.PageRespDto;
import io.github.xxyopen.novel.core.common.resp.RestResp;
import io.github.xxyopen.novel.core.constant.EsConsts;
import io.github.xxyopen.novel.dto.es.EsBookDto;
import io.github.xxyopen.novel.dto.req.BookSearchReqDto;
import io.github.xxyopen.novel.dto.resp.BookInfoRespDto;
import io.github.xxyopen.novel.service.SearchService;
import lombok.RequiredArgsConstructor;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
/**
* Elasticsearch 搜索 服务实现类
*
* @author xiongxiaoyang
* @date 2022/5/23
*/
@ConditionalOnProperty(prefix = "spring.elasticsearch", name = "enabled", havingValue = "true")
@Service
@RequiredArgsConstructor
@Slf4j
public class EsSearchServiceImpl implements SearchService {
private final ElasticsearchClient esClient;
@SneakyThrows
@Override
public RestResp<PageRespDto<BookInfoRespDto>> searchBooks(BookSearchReqDto condition) {
SearchResponse<EsBookDto> response = esClient.search(s -> {
SearchRequest.Builder searchBuilder = s.index(EsConsts.BookIndex.INDEX_NAME);
// 构建检索条件
buildSearchCondition(condition, searchBuilder);
// 排序
if (!StringUtils.isBlank(condition.getSort())) {
searchBuilder.sort(o -> o.field(f -> f
.field(StringUtils.underlineToCamel(condition.getSort().split(" ")[0]))
.order(SortOrder.Desc))
);
}
// 分页
searchBuilder.from((condition.getPageNum() - 1) * condition.getPageSize())
.size(condition.getPageSize());
// 设置高亮显示
searchBuilder.highlight(h -> h.fields(EsConsts.BookIndex.FIELD_BOOK_NAME,
t -> t.preTags("<em style='color:red'>").postTags("</em>"))
.fields(EsConsts.BookIndex.FIELD_AUTHOR_NAME,
t -> t.preTags("<em style='color:red'>").postTags("</em>")));
return searchBuilder;
},
EsBookDto.class
);
TotalHits total = response.hits().total();
List<BookInfoRespDto> list = new ArrayList<>();
List<Hit<EsBookDto>> hits = response.hits().hits();
// 类型推断 var 非常适合 for 循环,JDK 10 引入,JDK 11 改进
for (var hit : hits) {
EsBookDto book = hit.source();
assert book != null;
if (!CollectionUtils.isEmpty(hit.highlight().get(EsConsts.BookIndex.FIELD_BOOK_NAME))) {
book.setBookName(hit.highlight().get(EsConsts.BookIndex.FIELD_BOOK_NAME).get(0));
}
if (!CollectionUtils.isEmpty(
hit.highlight().get(EsConsts.BookIndex.FIELD_AUTHOR_NAME))) {
book.setAuthorName(
hit.highlight().get(EsConsts.BookIndex.FIELD_AUTHOR_NAME).get(0));
}
list.add(BookInfoRespDto.builder()
.id(book.getId())
.bookName(book.getBookName())
.categoryId(book.getCategoryId())
.categoryName(book.getCategoryName())
.authorId(book.getAuthorId())
.authorName(book.getAuthorName())
.wordCount(book.getWordCount())
.lastChapterName(book.getLastChapterName())
.build());
}
assert total != null;
return RestResp.ok(
PageRespDto.of(condition.getPageNum(), condition.getPageSize(), total.value(), list));
}
/**
* 构建检索条件
*/
private void buildSearchCondition(BookSearchReqDto condition,
SearchRequest.Builder searchBuilder) {
BoolQuery boolQuery = BoolQuery.of(b -> {
// 只查有字数的小说
b.must(RangeQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_WORD_COUNT)
.gt(JsonData.of(0))
)._toQuery());
if (!StringUtils.isBlank(condition.getKeyword())) {
// 关键词匹配
b.must((q -> q.multiMatch(t -> t
.fields(EsConsts.BookIndex.FIELD_BOOK_NAME + "^2",
EsConsts.BookIndex.FIELD_AUTHOR_NAME + "^1.8",
EsConsts.BookIndex.FIELD_BOOK_DESC + "^0.1")
.query(condition.getKeyword())
)
));
}
// 精确查询
if (Objects.nonNull(condition.getWorkDirection())) {
b.must(TermQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_WORK_DIRECTION)
.value(condition.getWorkDirection())
)._toQuery());
}
if (Objects.nonNull(condition.getCategoryId())) {
b.must(TermQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_CATEGORY_ID)
.value(condition.getCategoryId())
)._toQuery());
}
// 范围查询
if (Objects.nonNull(condition.getWordCountMin())) {
b.must(RangeQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_WORD_COUNT)
.gte(JsonData.of(condition.getWordCountMin()))
)._toQuery());
}
if (Objects.nonNull(condition.getWordCountMax())) {
b.must(RangeQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_WORD_COUNT)
.lt(JsonData.of(condition.getWordCountMax()))
)._toQuery());
}
if (Objects.nonNull(condition.getUpdateTimeMin())) {
b.must(RangeQuery.of(m -> m
.field(EsConsts.BookIndex.FIELD_LAST_CHAPTER_UPDATE_TIME)
.gte(JsonData.of(condition.getUpdateTimeMin().getTime()))
)._toQuery());
}
return b;
});
searchBuilder.query(q -> q.bool(boolQuery));
}
}