1、引入Druid数据源依赖

  1. <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
  2. <dependency>
  3.       <groupId>com.alibaba</groupId>
  4.       <artifactId>druid</artifactId>
  5.       <version>1.1.21</version>
  6. </dependency>

2、修改SpringBoot配置文件

  1. spring:
  2.   datasource:
  3.     username: root
  4.     password: root
  5.     url: jdbc:mysql://127.0.0.1:3306/test
  6.     driver-class-name: com.mysql.cj.jdbc.Driver
  7.     type: com.alibaba.druid.pool.DruidDataSource   ## 引入Druid数据源
  9.     ## 数据源其他配置
  10.     initialSize: 5
  11.     minIdle: 5
  12.     maxActive: 20
  13.     maxWait: 60000
  14.     timeBetweenEvictionRunsMillis: 60000
  15.     minEvictableIdleTimeMillis: 300000
  16.     validationQuery: SELECT 1 FROM DUAL
  17.     testWhileIdle: true
  18.     testOnBorrow: false
  19.     testOnReturn: false
  20.     poolPreparedStatements: true
  21.     ## 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
  22.     filters: stat,wall
  23.     maxPoolPreparedStatementPerConnectionSize: 20
  24.     useGlobalDataSourceStat: true
  25.     connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3、编写数据源配置类

/**
* Druid数据配置类
**/
@Configuration
public class MyDruidConfiguration {

    /**
     * 配置自定义数据源
     * @return
     */
    @Bean
    // 导入配置文件的配置
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource myDruidDataSource(){
        return new DruidDataSource();
    }

    /**
     * 配置Druid的监控管理后台
     * @return
     */
    @Bean
    public ServletRegistrationBean druidServletRegistrationBean(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");

        Map<String, String> initParams = new HashMap<>();
        initParams.put("loginUsername", "admin");
        initParams.put("loginPassword", "admin");
        initParams.put("allow", ""); // 默认允许所有访问
        initParams.put("deny", "");

        bean.setInitParameters(initParams);
        return bean;
    }

    /**
     * 配置一个web监控的filter
     * @return
     */
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map initParams = new HashMap();
        initParams.put("exclusions", "*.js,*.css,/druid/*");
        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));
        return bean;
    }
}

4、测试

访问：http://localhost:8080/druid/，输入配置的用户名和密码即可登录Druid数据源管理后台。
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