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README.md

Druid Spring Boot Starter

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Druid Spring Boot Starter 用于帮助你在Spring Boot项目中轻松集成Druid数据库连接池和监控。

如何使用

  1. 在 Spring Boot 项目中加入druid-spring-boot-starter依赖 (点击查询最新版本)

    Maven

    <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid-spring-boot-starter</artifactId>
       <version>1.1.17</version>
    </dependency>

    Gradle

    compile 'com.alibaba:druid-spring-boot-starter:1.1.17'
    
  2. 添加配置

    spring.datasource.url= 
    spring.datasource.username=
    spring.datasource.password=
    # ...其他配置(可选,不是必须的,使用内嵌数据库的话上述三项也可省略不填)

配置属性

Druid Spring Boot Starter 配置属性的名称完全遵照 Druid,你可以通过 Spring Boot 配置文件来配置Druid数据库连接池和监控,如果没有配置则使用默认值。

  • JDBC 配置
spring.datasource.druid.url= # 或spring.datasource.url= 
spring.datasource.druid.username= # 或spring.datasource.username=
spring.datasource.druid.password= # 或spring.datasource.password=
spring.datasource.druid.driver-class-name= #或 spring.datasource.driver-class-name=
  • 连接池配置
spring.datasource.druid.initial-size=
spring.datasource.druid.max-active=
spring.datasource.druid.min-idle=
spring.datasource.druid.max-wait=
spring.datasource.druid.pool-prepared-statements=
spring.datasource.druid.max-pool-prepared-statement-per-connection-size= 
spring.datasource.druid.max-open-prepared-statements= #和上面的等价
spring.datasource.druid.validation-query=
spring.datasource.druid.validation-query-timeout=
spring.datasource.druid.test-on-borrow=
spring.datasource.druid.test-on-return=
spring.datasource.druid.test-while-idle=
spring.datasource.druid.time-between-eviction-runs-millis=
spring.datasource.druid.min-evictable-idle-time-millis=
spring.datasource.druid.max-evictable-idle-time-millis=
spring.datasource.druid.filters= #配置多个英文逗号分隔
....//more
  • 监控配置
# WebStatFilter配置,说明请参考Druid Wiki,配置_配置WebStatFilter
spring.datasource.druid.web-stat-filter.enabled= #是否启用StatFilter默认值false
spring.datasource.druid.web-stat-filter.url-pattern=
spring.datasource.druid.web-stat-filter.exclusions=
spring.datasource.druid.web-stat-filter.session-stat-enable=
spring.datasource.druid.web-stat-filter.session-stat-max-count=
spring.datasource.druid.web-stat-filter.principal-session-name=
spring.datasource.druid.web-stat-filter.principal-cookie-name=
spring.datasource.druid.web-stat-filter.profile-enable=

# StatViewServlet配置,说明请参考Druid Wiki,配置_StatViewServlet配置
spring.datasource.druid.stat-view-servlet.enabled= #是否启用StatViewServlet(监控页面)默认值为false(考虑到安全问题默认并未启动,如需启用建议设置密码或白名单以保障安全)
spring.datasource.druid.stat-view-servlet.url-pattern=
spring.datasource.druid.stat-view-servlet.reset-enable=
spring.datasource.druid.stat-view-servlet.login-username=
spring.datasource.druid.stat-view-servlet.login-password=
spring.datasource.druid.stat-view-servlet.allow=
spring.datasource.druid.stat-view-servlet.deny=

# Spring监控配置,说明请参考Druid Github Wiki,配置_Druid和Spring关联监控配置
spring.datasource.druid.aop-patterns= # Spring监控AOP切入点,如x.y.z.service.*,配置多个英文逗号分隔

Druid Spring Boot Starter 不仅限于对以上配置属性提供支持,DruidDataSource 内提供setter方法的可配置属性都将被支持。你可以参考WIKI文档或通过IDE输入提示来进行配置。配置文件的格式你可以选择.properties.yml,效果是一样的,在配置较多的情况下推荐使用.yml

如何配置多数据源

  1. 添加配置
spring.datasource.url=
spring.datasource.username=
spring.datasource.password=

# Druid 数据源配置,继承spring.datasource.* 配置,相同则覆盖
...
spring.datasource.druid.initial-size=5
spring.datasource.druid.max-active=5
...

# Druid 数据源 1 配置,继承spring.datasource.druid.* 配置,相同则覆盖
...
spring.datasource.druid.one.max-active=10
spring.datasource.druid.one.max-wait=10000
...

# Druid 数据源 2 配置,继承spring.datasource.druid.* 配置,相同则覆盖
...
spring.datasource.druid.two.max-active=20
spring.datasource.druid.two.max-wait=20000
...

强烈注意:Spring Boot 2.X 版本不再支持配置继承,多数据源的话每个数据源的所有配置都需要单独配置,否则配置不会生效

  1. 创建数据源
@Primary
@Bean
@ConfigurationProperties("spring.datasource.druid.one")
public DataSource dataSourceOne(){
    return DruidDataSourceBuilder.create().build();
}
@Bean
@ConfigurationProperties("spring.datasource.druid.two")
public DataSource dataSourceTwo(){
    return DruidDataSourceBuilder.create().build();
}

如何配置 Filter

你可以通过 spring.datasource.druid.filters=stat,wall,log4j ... 的方式来启用相应的内置Filter,不过这些Filter都是默认配置。如果默认配置不能满足你的需求,你可以放弃这种方式,通过配置文件来配置Filter,下面是例子。

# 配置StatFilter 
spring.datasource.druid.filter.stat.enabled=true
spring.datasource.druid.filter.stat.db-type=h2
spring.datasource.druid.filter.stat.log-slow-sql=true
spring.datasource.druid.filter.stat.slow-sql-millis=2000

# 配置WallFilter 
spring.datasource.druid.filter.wall.enabled=true
spring.datasource.druid.filter.wall.db-type=h2
spring.datasource.druid.filter.wall.config.delete-allow=false
spring.datasource.druid.filter.wall.config.drop-table-allow=false

# 其他 Filter 配置不再演示

目前为以下 Filter 提供了配置支持,请参考文档或者根据IDE提示(spring.datasource.druid.filter.*)进行配置。

  • StatFilter
  • WallFilter
  • ConfigFilter
  • EncodingConvertFilter
  • Slf4jLogFilter
  • Log4jFilter
  • Log4j2Filter
  • CommonsLogFilter

要想使自定义 Filter 配置生效需要将对应 Filter 的 enabled 设置为 true ,Druid Spring Boot Starter 默认禁用 StatFilter,你也可以将其 enabled 设置为 true 来启用它。

如何获取 Druid 的监控数据

Druid 的监控数据可以在开启 StatFilter 后通过 DruidStatManagerFacade 进行获取,获取到监控数据之后你可以将其暴露给你的监控系统进行使用。Druid 默认的监控系统数据也来源于此。下面给做一个简单的演示,在 Spring Boot 中如何通过 HTTP 接口将 Druid 监控数据以 JSON 的形式暴露出去,实际使用中你可以根据你的需要自由地对监控数据、暴露方式进行扩展。

@RestController
public class DruidStatController {
    @GetMapping("/druid/stat")
    public Object druidStat(){
        // DruidStatManagerFacade#getDataSourceStatDataList 该方法可以获取所有数据源的监控数据,除此之外 DruidStatManagerFacade 还提供了一些其他方法,你可以按需选择使用。
        return DruidStatManagerFacade.getInstance().getDataSourceStatDataList();
    }
}
[
  {
    "Identity": 1583082378,
    "Name": "DataSource-1583082378",
    "DbType": "h2",
    "DriverClassName": "org.h2.Driver",
    "URL": "jdbc:h2:file:./demo-db",
    "UserName": "sa",
    "FilterClassNames": [
      "com.alibaba.druid.filter.stat.StatFilter"
    ],
    "WaitThreadCount": 0,
    "NotEmptyWaitCount": 0,
    "NotEmptyWaitMillis": 0,
    "PoolingCount": 2,
    "PoolingPeak": 2,
    "PoolingPeakTime": 1533782955104,
    "ActiveCount": 0,
    "ActivePeak": 1,
    "ActivePeakTime": 1533782955178,
    "InitialSize": 2,
    "MinIdle": 2,
    "MaxActive": 30,
    "QueryTimeout": 0,
    "TransactionQueryTimeout": 0,
    "LoginTimeout": 0,
    "ValidConnectionCheckerClassName": null,
    "ExceptionSorterClassName": null,
    "TestOnBorrow": true,
    "TestOnReturn": true,
    "TestWhileIdle": true,
    "DefaultAutoCommit": true,
    "DefaultReadOnly": null,
    "DefaultTransactionIsolation": null,
    "LogicConnectCount": 103,
    "LogicCloseCount": 103,
    "LogicConnectErrorCount": 0,
    "PhysicalConnectCount": 2,
    "PhysicalCloseCount": 0,
    "PhysicalConnectErrorCount": 0,
    "ExecuteCount": 102,
    "ErrorCount": 0,
    "CommitCount": 100,
    "RollbackCount": 0,
    "PSCacheAccessCount": 100,
    "PSCacheHitCount": 99,
    "PSCacheMissCount": 1,
    "StartTransactionCount": 100,
    "TransactionHistogram": [
      55,
      44,
      1,
      0,
      0,
      0,
      0
    ],
    "ConnectionHoldTimeHistogram": [
      53,
      47,
      3,
      0,
      0,
      0,
      0,
      0
    ],
    "RemoveAbandoned": false,
    "ClobOpenCount": 0,
    "BlobOpenCount": 0,
    "KeepAliveCheckCount": 0,
    "KeepAlive": false,
    "FailFast": false,
    "MaxWait": 1234,
    "MaxWaitThreadCount": -1,
    "PoolPreparedStatements": true,
    "MaxPoolPreparedStatementPerConnectionSize": 5,
    "MinEvictableIdleTimeMillis": 30001,
    "MaxEvictableIdleTimeMillis": 25200000,
    "LogDifferentThread": true,
    "RecycleErrorCount": 0,
    "PreparedStatementOpenCount": 1,
    "PreparedStatementClosedCount": 0,
    "UseUnfairLock": true,
    "InitGlobalVariants": false,
    "InitVariants": false
  }
]

IDE 提示支持

演示

克隆项目,运行test包内的DemoApplication

参考

Druid Wiki

Spring Boot Reference

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