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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。
-
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'
-
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)
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
或.yml
,效果是一样的,在配置较多的情况下推荐使用.yml
。
- 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
- 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();
}
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。
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
}
]
克隆项目,运行test
包内的DemoApplication
。