Spring Boot 整合 Druid && 配置数据源监控

1. 导入 Druid 包

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.12</version>
</dependency>

2. application 配置文件配置 druid 数据源

spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://127.0.0.1:3306/springboot?serverTimezone=GMT%2B8
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    # 下面为连接池的补充设置，应用到上面所有数据源中
    # 初始化大小，最小，最大
    initialSize: 1
    minIdle: 3
    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，单位是毫秒
    timeBetweenEvictionRunsMillis: 60000
    # 配置一个连接在池中最小生存的时间，单位是毫秒
    minEvictableIdleTimeMillis: 30000
    #validationQuery: select 'x'
    testWhileIdle: false
    testOnBorrow: false
    testOnReturn: false
    # 打开PSCache，并且指定每个连接上PSCache的大小
    poolPreparedStatements: true
    maxPoolPreparedStatementPerConnectionSize: 20
    # 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
    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
    # 合并多个DruidDataSource的监控数据
    useGlobalDataSourceStat: true

3. 编写 DruidConfig 配置类

/***
 * Druid 配置类
 */
@Configuration
public class DruidConfig {

    /**
     * 绑定Druid数据源
     * @return
     */
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

//    配置druid的监控
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");

        Map<String,String> map = new HashMap<>();
        map.put("loginUsername","admin");
        map.put("loginPassword","admin");
        map.put("allow","");
        servletRegistrationBean.setInitParameters(map);

        return servletRegistrationBean;
    }

    public FilterRegistrationBean WebStatFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());

        Map<String,String> map = new HashMap<>();
        map.put("exclusions","*.js,*,css,/druid/*");

        filterRegistrationBean.setInitParameters(map);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));

        return filterRegistrationBean;
    }
}