SpringBoot使用Druid数据源

导入druid依赖

 <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>

yaml配置文件

spring:
  datasource:
    username: root
    password: root
    #假如时区报错，就增加一个时区的配置就ok了，serverTimezone=UTC
    url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

      #SpringBoot默认是不注入这些的，需要自己绑定
      #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
      #如果允许报错，java.lang.ClassNotFoundException: org.apache.Log4j.Properity
      #则导入log4j 依赖就行
      filters: stat,wall,log4j
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

druid配置文件

package com.ji.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.Filter;
import javax.servlet.ServletRegistration;
import javax.sql.DataSource;
import java.util.HashMap;

@Configuration
public class DruidConfig{
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource ();
    }
    //后台监控  web.xml
    //因为SpringBoot内置了Servlet容器所有没有web.xml，替代方法ServletRegistrationBean
    @Bean
    public ServletRegistrationBean statViewServlet(){
        //后台需要有人登录账号密码
        HashMap<String, String> initParams = new HashMap<> ();
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<> (new StatViewServlet (), "/druid/*");
        //增加配置
        initParams.put ("loginUsername","admin");  //登录key是固定的
        initParams.put ("loginPassword","123456");

        //允许谁可以访问
        initParams.put ("allow","");//""谁都可以访问
        //禁止谁能访问呢
        //initParams.put ("jsp","ip地址")
        bean.setInitParameters (initParams);//设置初始化参数
        return bean;
    }

    //filter 过滤器
    @Bean
    public FilterRegistrationBean webStartFilter(){
        FilterRegistrationBean<Filter> bean = new FilterRegistrationBean<> ();
        bean.setFilter (new WebStatFilter ());
        //可以过滤那些请求
        HashMap<String, String> initParams = new HashMap<> ();
        initParams.put ("exclusions","*.js,*.css,/druid/*");//这些东西不通行

        return bean;
    }
}

访问即可开启监控页面