Druid

概述

官网： https://github.com/alibaba/druid
 
文档： https://github.com/alibaba/druid/wiki
 
基础配置列表： https://github.com/alibaba/druid/wiki/DruidDataSource配置属性列表
 
参考配置： https://github.com/alibaba/druid/wiki/DruidDataSource配置
 
依赖： https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter
 
内置过滤器的名字参考： com\alibaba\druid\1.2.15\druid-1.2.15.jar!\META-INF\druid-filter.properties

 
内置过滤器的名字参考：com\alibaba\druid\1.2.15\druid-1.2.15.jar!\META-INF\druid-filter.properties

 
配置读取类：com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure

 
Druid支持的数据类型：com.alibaba.druid.DbType

使用

Druid管理访问： http://127.0.0.1:9999/druid/

 
pom.yml

<!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.15</version>
</dependency>

 
application.yml

spring:
  datasource:
    driver-class-name: com.p6spy.engine.spy.P6SpyDriver
    druid:
      web-stat-filter:
        enabled: true
        exclusions: '*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*'
        session-stat-enable: true
        profile-enable: true
        url-pattern: /*
      # web页面开启
      stat-view-servlet:
        enabled: true
        login-username: root
        login-password: root
        url-pattern: /druid/*
        
      
      filters: stat,wall,mergeStat
      # 配置初始化大小、最小、最大
      min-idle: 10
      initial-size: 5
      max-active: 20
      # 配置获取连接等待超时的时间
      max-wait: 6000
      
      #  配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
      time-between-eviction-runs-millis: 10000
      
      #  配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 600000
      max-evictable-idle-time-millis: 1000000
      
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      keep-alive: true
      phy-max-use-count: 100
      db-type: mysql
      
      # 坑，无排除选项，且值必须是逗号分割的字符串数组，建议参考com.alibaba.druid.spring.boot.autoconfigure.stat.DruidSpringAopConfiguration自行配置注入相关Bean
      #aop-patterns: "work.linruchang.*,work.linruchang.config.*,"
  

 
SpringConfig.java - 配置Druid的Spring监控

@Configuration
public class SpringConfig  implements WebMvcConfigurer {
    @Bean
    public DruidStatInterceptor druidStatInterceptor() {
        DruidStatInterceptor dsInterceptor = new DruidStatInterceptor();
        return dsInterceptor;
    }

    @Bean
    public JdkRegexpMethodPointcut druidStatPointcut() {
        JdkRegexpMethodPointcut pointcut = new JdkRegexpMethodPointcut();
        pointcut.setPattern("work.linruchang.*");//根据实际包名
        pointcut.setExcludedPatterns("work.linruchang.kafkaUiLite.conf.*", ".*config.*");
        return pointcut;
    }

    @Bean
    public DefaultPointcutAdvisor druidStatAdvisor(DruidStatInterceptor druidStatInterceptor, JdkRegexpMethodPointcut druidStatPointcut) {
        DefaultPointcutAdvisor defaultPointAdvisor = new DefaultPointcutAdvisor();
        defaultPointAdvisor.setPointcut(druidStatPointcut);
        defaultPointAdvisor.setAdvice(druidStatInterceptor);
        return defaultPointAdvisor;
    }
}

问题解决

Spring监控不生效

方式1：修改yml的配置写法

参考类： com.alibaba.druid.spring.boot.autoconfigure.stat.DruidSpringAopConfiguration
 
个人怀疑：@ConditionalOnProperty仅能识别到字符串，不能识别yml形式的数组语法

 
applicaiton.yml == 正确写法

spring:
  datasource:
    druid:
      # 坑，缺少排除选项，且值必须是逗号分割的字符串数组才行，个人建议还是使用自行设置JdkRegexpMethodPointcut拦截切面
      aop-patterns: "work.linruchang.*,work.linruchang.config.*"

 
applicaiton.yml == 错误写法

spring:
  datasource:
    druid:
      # 坑，无排除选项，且值必须是逗号分割的字符串数组，虽然通过@Value能获取到数组，但是不能被@ConditionalOnProperty注解识别到
      aop-patterns: 
        - "work.linruchang.*"
        - "work.linruchang.config.*"

方式2：参考DruidSpringAopConfiguration自行注入@Bean，灵活（更建议）

@Configuration
public class SpringConfig  implements WebMvcConfigurer {
    @Bean
    public DruidStatInterceptor druidStatInterceptor() {
        DruidStatInterceptor dsInterceptor = new DruidStatInterceptor();
        return dsInterceptor;
    }

    @Bean
    public JdkRegexpMethodPointcut druidStatPointcut() {
        JdkRegexpMethodPointcut pointcut = new JdkRegexpMethodPointcut();
        pointcut.setPattern("work.linruchang.*");//根据实际包名
        pointcut.setExcludedPatterns("work.linruchang.kafkaUiLite.conf.*", ".*config.*");
        return pointcut;
    }

    @Bean
    public DefaultPointcutAdvisor druidStatAdvisor(DruidStatInterceptor druidStatInterceptor, JdkRegexpMethodPointcut druidStatPointcut) {
        DefaultPointcutAdvisor defaultPointAdvisor = new DefaultPointcutAdvisor();
        defaultPointAdvisor.setPointcut(druidStatPointcut);
        defaultPointAdvisor.setAdvice(druidStatInterceptor);
        return defaultPointAdvisor;
    }
}