背景

Druid连接池是阿里巴巴开源的数据库连接池项目。Druid连接池为监控而生，内置强大的监控功能，监控特性不影响性能。功能强大，能防SQL注入，内置Loging能诊断Hack应用行为。现在已经SpringBoot3，Druid的配置也需要随着更新。

SpringBoot3整合Druid

在SpringBoot3中整合Druid连接池，可以通过以下步骤进行配置：

1. 添加依赖：在项目的pom.xml文件中添加Druid的Spring Boot Starter依赖。

   <druid.version>1.2.23</druid.version>
   
   <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-3-starter -->
   <dependency>
   	<groupId>com.alibaba</groupId>
   	<artifactId>druid-spring-boot-3-starter</artifactId>
   	<version>${druid.version}</version>
   </dependency>

   同时，确保已经添加了数据库驱动的依赖，例如MySQL：

   <!--<dependency>
   	<groupId>mysql</groupId>
   	<artifactId>mysql-connector-java</artifactId>
   	<version>${mysql.version}</version>
   </dependency>-->
   <dependency>
   	<groupId>org.postgresql</groupId>
   	<artifactId>postgresql</artifactId>
   	<version>${postgresql.version}</version>
   </dependency>

2. 配置YAML：在application.yml中配置数据源和Druid连接池的参数。

   spring:
     datasource:
       type: com.alibaba.druid.pool.DruidDataSource
       driver-class-name: com.mysql.cj.jdbc.Driver
       url: jdbc:mysql://localhost:3306/test?characterEncoding=utf8&serverTimezone=Asia/Shanghai
       username: root
       password: root123
       druid:
         initial-size: 5
         min-idle: 5
         max-active: 20
         max-wait: 60000
         time-between-eviction-runs-millis: 60000
         min-evictable-idle-time-millis: 30000
         validation-query: select 'x'
         test-while-idle: true
         test-on-borrow: false
         test-on-return: false
         pool-prepared-statements: false
         filters: stat,wall,slf4j
         max-pool-prepared-statement-per-connection-size: -1
         use-global-data-source-stat: true
         connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
         web-stat-filter:
           enabled: true
           url-pattern: /*
           exclusions: /druid/*,*.js,*.gif,*.jpg,*.png,*.css,*.ico
         stat-view-servlet:
           enabled: true
           url-pattern: /druid/*
           reset-enable: false
           login-username: druid
           login-password: druid
           allow: 127.0.0.1
           deny:

3. 启动项目：启动Spring Boot应用后，Druid连接池将自动配置并可以使用。你可以通过访问Druid提供的监控页面来查看数据库连接池的状态。监控页面的访问地址通常是http://localhost:8080/druid/login.html，输入配置的用户名和密码即可登录。

以上步骤是基本方法，仅供，具体配置可能会根据Druid版本和Spring Boot版本的不同有所变化。在实际操作时，建议参考Druid的官方文档和Spring Boot的官方文档进行配置。

Druid监控

http://localhost:12666/api/system/druid/login.html

http://localhost:12666/api/system/druid/index.html

 

 

Github参考代码

当然你也可以参考SpringBoot3脚手架之MySpringBootAPI部分，下载即可开始使用，DRUID已配置。https://github.com/moshowgame/MySpringBootAPIhttps://github.com/moshowgame/MySpringBootAPI

filters=log4j "ClassNotFoundException: org.apache.log4j.Priority" issue 

可以改为 filters: stat,wall,slf4j 或者干脆不要log4j和slf4j

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-09-29T19:24:22.892+08:00 ERROR 9648 --- [MySpringBootAPI] [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to bind properties under 'spring.datasource.druid' to com.alibaba.druid.spring.boot3.autoconfigure.DruidDataSourceWrapper:

    Property: spring.datasource.druid.filters
    Value: "stat,wall,log4j"
    Origin: class path resource [application-dev.yml] - 52:18
    Reason: java.lang.ClassNotFoundException: org.apache.log4j.Priority

Action:

Update your application's configuration


Process finished with exit code 1

 Application 完整YAML参考

server:
  port: 12666
  servlet:
      context-path: /api
  undertow:
    threads:
      io: 4
      worker: 20
    url-charset: UTF-8
spring:
    banner:
      charset: UTF-8
    application:
        name: MySpringBootAPI
    freemarker:
        request-context-attribute: request
        suffix: .html
        content-type: text/html
        enabled: true
        cache: false
        charset: UTF-8
        allow-request-override: false
        expose-request-attributes: true
        expose-session-attributes: true
        expose-spring-macro-helpers: true
        template-loader-path: classpath:/templates/
        settings:
          number_format: 0.##
    mvc:
      static-path-pattern: /static/**
    servlet:
      multipart:
        max-file-size: 10MB
        max-request-size: 10MB
    datasource:
      type: com.alibaba.druid.pool.DruidDataSource
      driverClassName: org.postgresql.Driver
      url: jdbc:postgresql://127.0.0.1:5432/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
      username: postgres
      password: root123
      druid:
        initialSize: 5
        minIdle: 5
        maxActive: 20
        maxWait: 60000
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        filters: stat,wall,slf4j
        # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
        connectionProperties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
        # 配置DruidStatFilter
        web-stat-filter:
          enabled: true
          url-pattern: "/*"
          exclusions: "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*,/system/druid/*"
        # 配置DruidStatViewServlet
        stat-view-servlet:
          enabled: true
          url-pattern: "/system/druid/*"
          # IP白名单(没有配置或者为空，则允许所有访问)
          allow: localhost,127.0.0.1,192.168.*
          # IP黑名单 (存在共同时，deny优先于allow)
          deny: 10.1.*
          #  禁用HTML页面上的“Reset All”功能
          reset-enable: false
          # 登录名
          login-username: admin
          # 登录密码
          login-password: 123456