springboot整合druid

Spring Boot 2.0 以上默认使用 Hikari 数据源，
而druid是阿里巴巴开发的数据源，都很优秀。

1.application.yml

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/aa?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&userSSL=false
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
      #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECt 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

      #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
      #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
      #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

#    hikari:
#      username: root
#      password: 123456
#      jdbc-url: jdbc:mysql://localhost:3306/aa?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&userSSL=false
#      driver-class-name: com.mysql.cj.jdbc.Driver

2.在config包里新建Config.class

//配置 Druid 监控管理后台的Servlet；
//内置 Servlet 容器时没有web.xml文件，所以使用 Spring Boot 的注册 Servlet 方式
@Configuration
public class DruidConfig {
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")//相当于绑定了application.yml
    public DataSource druidDatasource(){
        return new DruidDataSource();
    }
//后台监控
// 这些参数可以在 com.alibaba.druid.support.http.StatViewServlet
// 的父类 com.alibaba.druid.support.http.ResourceServlet 中找到
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        Map initParams = new HashMap<>();
        initParams.put("loginUsername", "admin"); //后台管理界面的登录账号
        initParams.put("loginPassword", "123456"); //后台管理界面的登录密码
        bean.setInitParameters(initParams);//设置初始化参数

        //允许所有人访问
        initParams.put("allow","");
        //禁止此ip访问
        initParams.put("kaung","192.34.1.30");
        return bean;
    }

//配置 Druid 监控 之  web 监控的 filter
//WebStatFilter：用于配置Web和Druid数据源之间的管理关联监控统计
@Bean
public FilterRegistrationBean webStatFilter() {
    FilterRegistrationBean bean = new FilterRegistrationBean();
    bean.setFilter(new WebStatFilter());

    //exclusions：设置哪些请求进行过滤排除掉，从而不进行统计
    Map initParams = new HashMap<>();
    initParams.put("exclusions", "*.js,*.css,/druid/*,/jdbc/*");
    bean.setInitParameters(initParams);
    return bean;
}

}

3.导入依赖

     mysql
     mysql-connector-java
 
 ​
 
     com.alibaba
     druid-spring-boot-starter
     1.1.10
 
 ​
 
     org.mybatis.spring.boot
     mybatis-spring-boot-starter
     2.1.1