Springboot整合Druid数据源

一、导入依赖

            com.alibaba
            druid
            1.1.21

二、application.yml中启用Druid

三、配置Druid

方法一（编写DruidConfig类来配置）

package com.fdw.springbootstudy.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.ServletRegistration;
import javax.sql.DataSource;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfig {
    //绑定application里的配置
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
    //手动注入Servlet
    //后台监控
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        //后台需要有人登录，账号密码配置
        HashMap initParameters = new HashMap<>();
        //增加配置(两个参数名是固定的)
        initParameters.put("loginUsername","admin");
        initParameters.put("loginPassword","123456");
        //允许谁能访问
        initParameters.put("allow","");

        //禁止谁能访问
        //initParameters.put("fdw","192.168.11.123");
        bean.setInitParameters(initParameters);
        return bean;
    }

    //手动注入Filter
    //阿里巴巴过滤器
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        //可以过滤哪些请求
        Map initmap = new HashMap<>();
        initmap.put("exclusions","*.js,*.css,/druid/*");
        bean.setInitParameters(initmap);
        return bean;
    }


}

在application.yml中如下配置 

 方法二（导入druid-spring-boot-starter依赖）

  
            com.alibaba
            druid-spring-boot-starter
            1.1.10
        
        
            log4j
            log4j
            1.2.17
        

然后只需在application.yml中配置，不需要写config类

server:
  port: 8081
spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    driver-class-name: com.mysql.cj.jdbc.Driver
    #配置Druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    #Druid数据源专有配置，必须导入druid-spring-boot-starter才能生效，也可以通过DruidConfig注入生效
    druid:
      initial-size: 5
      min-idle: 5
      max-active: 20
      max-wait: 60000
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 30000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      pool-prepared-statements: 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,则导入log4j依赖即可
      filters: stat,wall,log4j
      max-pool-prepared-statement-per-connection-size: 20
      use-global-data-source-stat: true
      connect-properties: druid.stat.mergesql=true;druid.stat.slowSqlMills=500
      #配置监控页面servlet的用户名和密码
      stat-view-servlet:
        login-username: admin
        login-password: 123456
      #配置监控页面filter过滤器
      web-stat-filter:
        exclusions: "*.js,*.css,/druid/*"

四、查看监控页面