1.添加Druid依赖

pom.xml

 <!--druid-->
 <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid</artifactId>
       <version>1.1.20</version>
 </dependency>

2.添加druid配置

application.properties

################
# db 整合多数据源
################
####db1
spring.datasource.user.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.user.jdbc-url=jdbc:mysql://localhost:3306/user
spring.datasource.user.username=root
spring.datasource.user.password=123456
spring.datasource.user.driver-class-name=com.mysql.cj.jdbc.Driver

# 下面为连接池的补充设置，应用到上面所有数据源中
spring.datasource.user.initialSize=5
spring.datasource.user.minIdle=5
spring.datasource.user.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.user.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
spring.datasource.user.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.user.minEvictableIdleTimeMillis=300000
spring.datasource.user.validationQuery=SELECT 1 FROM DUAL
spring.datasource.user.testWhileIdle=true
spring.datasource.user.testOnBorrow=false
spring.datasource.user.testOnReturn=false
# 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
spring.datasource.user.filters=stat,wall,log4j
spring.datasource.user.logSlowSql=true

####db2
spring.datasource.product.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.product.jdbc-url=jdbc:mysql://localhost:3306/product
spring.datasource.product.username=root
spring.datasource.product.password=123456
spring.datasource.product.driver-class-name=com.mysql.cj.jdbc.Driver

# 下面为连接池的补充设置，应用到上面所有数据源中
spring.datasource.product.initialSize=5
spring.datasource.product.minIdle=5
spring.datasource.product.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.product.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
spring.datasource.product.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.product.minEvictableIdleTimeMillis=300000
spring.datasource.product.validationQuery=SELECT 1 FROM DUAL
spring.datasource.product.testWhileIdle=true
spring.datasource.product.testOnBorrow=false
spring.datasource.product.testOnReturn=false
# 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
spring.datasource.product.filters=stat,wall,log4j
spring.datasource.product.logSlowSql=true

3.配置展示页面

在config包下新建DruidConfig.java

package com.wd.demo.config;

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
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;

@Configuration
public class DruidConfig {

    @Bean
    public ServletRegistrationBean statViewServlet() {
        //创建servlet注册实体
        // 1.StatViewServlet是druid实现的一个Servlet容器，来显示druid的一些信息
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        //设置ip白名单
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        //设置ip黑名单，如果allow与deny共同存在时,deny优先于allow
        servletRegistrationBean.addInitParameter("deny", "192.168.0.19");
        //设置控制台管理用户
        servletRegistrationBean.addInitParameter("loginUsername", "druid");
        servletRegistrationBean.addInitParameter("loginPassword", "123456");
        //是否可以重置数据
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }

    //设置网站的过滤信息
    @Bean
    public FilterRegistrationBean statFilter() {
        //创建过滤器
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        //设置过滤器过滤路径
        filterRegistrationBean.addUrlPatterns("/*");
        //忽略过滤的形式
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}