springboot中Druid的数据源监控

添加maven依赖

 <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
         <!--阿里巴巴druid依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.20</version>
        </dependency>

application.yml文件的配置

spring:
  datasource:
    druid:
      #   数据源基本配置
      username: root
      password: root
      url: jdbc:mysql://127.0.0.1:3306/springboottest?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&useSSL=false
      driver-class-name: com.mysql.cj.jdbc.Driver
      # 连接池配置
      # 初始化大小，最小，最大
      initialSize: 5
      minIdle: 5
      maxActive: 20
      # 配置获取连接等待超时的时间
      maxWait: 60000
      # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位毫秒
      timeBetweenEvictionRunsMillis: 60000
      # 配置一个连接在池中最小生存时间
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1 FROM DUAL
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      # 打开 PSCache，并且指定每个连接上 PSCache 的大小
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 20
      # 合并多个DruidDataSource的监控数据
      useGlobalDataSourceStat: true
      # 配置监控统计拦截的 Filter，去掉后监控界面 SQL 无法统计，wall 用于防火墙
      filters: stat,wall,log4j2
      # 通过 connection-properties 属性打开 mergeSql 功能；慢 SQL 记录
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

Druid 的数据源监控

/**
 * Druid 的数据源监控
 *
 * @author sxyuser
 */
@Configuration
public class DruidConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.druid")
    public DataSource druidDataSource() {
        return new DruidDataSource();
    }

    /**
     * 配置一个监控的filter
     *
     * @return
     */
    @Bean
    public FilterRegistrationBean<WebStatFilter> webStatFilter() {

        FilterRegistrationBean<WebStatFilter> beanFilter = new FilterRegistrationBean<>();

        beanFilter.setFilter(new WebStatFilter());

        Map<String, String> initParams = new HashMap<>();
        // 排除名单
        initParams.put("exclusions", "*.js,*.css,/druid/*");
        beanFilter.setInitParameters(initParams);
        // 所有请求进行监控处理
        beanFilter.setUrlPatterns(Collections.singletonList("/*"));
        return beanFilter;

    }


    /**
     * 配置一个管理后台的servlet
     *
     * @return
     */
    @Bean
    public ServletRegistrationBean<StatViewServlet> setStatViewServlet() {
        ServletRegistrationBean<StatViewServlet> beanServlet = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        Map<String, String> initParams = new HashMap<>();
        initParams.put("loginUsername", "root");
        initParams.put("loginPassword", "root");
        //默认允许任何访问但需提供账户和密码
        initParams.put("allow", "");
        beanServlet.setInitParameters(initParams);
        return beanServlet;
    }
}

配置完成后输入地址：http://localhost:端口号/项目名/druid/login.html输入用户名密码后即可查询后台监控界面；