一、環(huán)境配置

1、添加pom依賴

        <!--druid數(shù)據(jù)源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.20</version>
        </dependency>

2、添加配置文件

spring:
  datasource:
#   數(shù)據(jù)源基本配置
    username: root
    password: admin
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/jdbc?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    type: com.alibaba.druid.pool.DruidDataSource
#   數(shù)據(jù)源其他配置
    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
#   配置監(jiān)控統(tǒng)計(jì)攔截的filters，去掉后監(jiān)控界面sql無法統(tǒng)計(jì)，'wall'用于防火墻  
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

二、編寫druid配置類

創(chuàng)建DruidConfig類

package com.me.study.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.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfig {
    // @ConfigurationProperties() 將配置文件中的連接池配置添加到數(shù)據(jù)源
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

    // 配置Druid的監(jiān)控     
    // 配置一個(gè)管理后臺(tái)的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
        servletRegistrationBean.setServlet(new StatViewServlet());
        // 配置管理后臺(tái)路徑
        servletRegistrationBean.setUrlMappings(Arrays.asList("/druid/*"));
        Map<String,String> initParams = new HashMap<>();
        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","123456");
        initParams.put("allow","");// 配置允許訪問的路徑，默認(rèn)允許所有訪問
        initParams.put("deny","192.168.1.150"); // 拒絕那些路徑訪問
        servletRegistrationBean.setInitParameters(initParams);
        return servletRegistrationBean;
    }

    // 配置一個(gè)web監(jiān)控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*"); //忽略哪些請(qǐng)求，不過濾的請(qǐng)求
        filterRegistrationBean.setInitParameters(initParams);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));// 過濾所有請(qǐng)求
        return filterRegistrationBean;
    }

}

三、運(yùn)行測(cè)試

1、初次運(yùn)行

啟動(dòng)時(shí)報(bào)錯(cuò)(這個(gè)錯(cuò)誤挺預(yù)想不到的)：

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to bind properties under 'spring.datasource' to javax.sql.DataSource:

    Property: spring.datasource.filters
    Value: stat,wall,log4j
    Origin: class path resource [application.yml]:22:14
    Reason: org.apache.log4j.Logger

Action:

Update your application's configuration

Process finished with exit code 1

2、解決方式

到網(wǎng)上搜索了以下，有個(gè)博主和我有一摸一樣的問題，所以參考了那位博主的解決方案，博文連接：https://blog.csdn.net/xingkongtianma01/article/details/81624313
錯(cuò)誤出現(xiàn)原因是：缺少log4j的相關(guān)依賴
所以，添加log4j依賴：

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

3、再次運(yùn)行

錯(cuò)誤解決，運(yùn)行結(jié)果：

druid數(shù)據(jù)源監(jiān)控登錄界面，用戶名密碼為以上servlet配置

登錄成功，數(shù)據(jù)監(jiān)控首頁面：

druid數(shù)據(jù)監(jiān)控首頁面