SpringBoot集成阿里巴巴Druid监控

时间：2021-08-05 04:52:02

druid是阿里巴巴开源的数据库连接池，提供了优秀的对数据库操作的监控功能，本文要讲解一下springboot项目怎么集成druid。

本文在基于jpa的项目下开发，首先在pom文件中额外加入druid依赖，pom文件如下：

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dalaoyang</groupId>

    <artifactId>springboot_druid</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>springboot_druid</name>

    <description>springboot_druid</description>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.5.12.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-data-jpa</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-devtools</artifactId>

            <scope>runtime</scope>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <scope>runtime</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>druid</artifactId>

            <version>1.0.28</version>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

application.properties上半段和整合jpa一点没变，下面加入了一些druid的配置，如果对druid的配置有什么不理解的，可以去网上查一下。（这篇文章我觉得写的很好，传送门）

#端口号

server.port=8888

##validate  加载hibernate时，验证创建数据库表结构

##create   每次加载hibernate，重新创建数据库表结构，这就是导致数据库表数据丢失的原因。

##create-drop        加载hibernate时创建，退出是删除表结构

##update                 加载hibernate自动更新数据库结构

##validate 启动时验证表的结构，不会创建表

##none  启动时不做任何操作

spring.jpa.hibernate.ddl-auto=create

##控制台打印sql

spring.jpa.show-sql=true

##数据库配置

##数据库地址

spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=false

##数据库用户名

spring.datasource.username=root

##数据库密码

spring.datasource.password=root

##数据库驱动

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

#这里是不同的

#使用druid的话 需要多配置一个属性spring.datasource.type

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource  

# 连接池的配置信息

# 初始化大小，最小，最大

spring.datasource.initialSize=5

spring.datasource.minIdle=5

spring.datasource.maxActive=20

# 配置获取连接等待超时的时间

spring.datasource.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.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.minEvictableIdleTimeMillis=300000

spring.datasource.validationQuery=SELECT 1 FROM DUAL

spring.datasource.testWhileIdle=true

spring.datasource.testOnBorrow=false

spring.datasource.testOnReturn=false

# 打开PSCache，并且指定每个连接上PSCache的大小

spring.datasource.poolPreparedStatements=true

spring.datasource.maxPoolPreparedStatementPerConnectionSize=20

# 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.filters=stat,wall,log4j

# 通过connectProperties属性来打开mergeSql功能；慢SQL记录

然后在项目中加入DruidConfig，简单讲解一下，这个配置文件主要是加载application.properties的配置，代码如下：

package com.dalaoyang.config;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Primary;

import com.alibaba.druid.pool.DruidDataSource;

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.config

 * @email yangyang@dalaoyang.cn

 * @date 2018/4/12

 */

@Configuration

public class DruidConfig {

    private Logger logger = Logger.getLogger(this.getClass());

    @Value("${spring.datasource.url}")

    private String dbUrl;

    @Value("${spring.datasource.username}")

    private String username;

    @Value("${spring.datasource.password}")

    private String password;

    @Value("${spring.datasource.driver-class-name}")

    private String driverClassName;

    @Value("${spring.datasource.initialSize}")

    private int initialSize;

    @Value("${spring.datasource.minIdle}")

    private int minIdle;

    @Value("${spring.datasource.maxActive}")

    private int maxActive;

    @Value("${spring.datasource.maxWait}")

    private int maxWait;

    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")

    private int timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.minEvictableIdleTimeMillis}")

    private int minEvictableIdleTimeMillis;

    @Value("${spring.datasource.validationQuery}")

    private String validationQuery;

    @Value("${spring.datasource.testWhileIdle}")

    private boolean testWhileIdle;

    @Value("${spring.datasource.testOnBorrow}")

    private boolean testOnBorrow;

    @Value("${spring.datasource.testOnReturn}")

    private boolean testOnReturn;

    @Value("${spring.datasource.poolPreparedStatements}")

    private boolean poolPreparedStatements;

    @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")

    private int maxPoolPreparedStatementPerConnectionSize;

    @Value("${spring.datasource.filters}")

    private String filters;

    @Value("{spring.datasource.connectionProperties}")

    private String connectionProperties;

    @Bean

    @Primary  //主数据源

    public DataSource dataSource(){

        DruidDataSource datasource = new DruidDataSource();

        datasource.setUrl(this.dbUrl);

        datasource.setUsername(username);

        datasource.setPassword(password);

        datasource.setDriverClassName(driverClassName);

        //configuration

        datasource.setInitialSize(initialSize);

        datasource.setMinIdle(minIdle);

        datasource.setMaxActive(maxActive);

        datasource.setMaxWait(maxWait);

        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);

        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);

        datasource.setValidationQuery(validationQuery);

        datasource.setTestWhileIdle(testWhileIdle);

        datasource.setTestOnBorrow(testOnBorrow);

        datasource.setTestOnReturn(testOnReturn);

        datasource.setPoolPreparedStatements(poolPreparedStatements);

        datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);

        try {

            datasource.setFilters(filters);

        } catch (SQLException e) {

            logger.error("druid configuration Exception", e);

        }

        datasource.setConnectionProperties(connectionProperties);

        return datasource;

    }

}

然后创建DruidFilter，代码如下：

package com.dalaoyang.filter;

import javax.servlet.annotation.WebFilter;

import javax.servlet.annotation.WebInitParam;

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

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.filter

 * @email yangyang@dalaoyang.cn

 * @date 2018/4/12

 */

@WebFilter(filterName="druidWebStatFilter",urlPatterns="/*",

        initParams={

                @WebInitParam(name="exclusions",value="*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")//忽略资源

        }

)

public class DruidFilter extends WebStatFilter  {

}

新建DruidServlet，在类上面加注解@WebServlet，其中配置了登录druid监控页面的账号密码，白名单黑名单之类的配置，代码如下：

package com.dalaoyang.servlet;

import javax.servlet.annotation.WebInitParam;

import javax.servlet.annotation.WebServlet;

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

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.servlet

 * @email yangyang@dalaoyang.cn

 * @date 2018/4/12

 */

@WebServlet(urlPatterns="/druid/*",

        initParams={

                @WebInitParam(name="allow",value=""),// IP白名单(没有配置或者为空，则允许所有访问)

                @WebInitParam(name="deny",value=""),// IP黑名单 (deny优先于allow)

                @WebInitParam(name="loginUsername",value="admin"),// 登录druid管理页面用户名

                @WebInitParam(name="loginPassword",value="admin")// 登录druid管理页面密码

        })

public class DruidServlet extends StatViewServlet {

}

然后在启动类加入注解@ServletComponentScan，让项目扫描到servlet，代码如下：

package com.dalaoyang;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication

// 启动类必须加入@ServletComponentScan注解，否则无法扫描到servlet

@ServletComponentScan

public class SpringbootDruidApplication {

    public static void main(String[] args) {

        SpringApplication.run(SpringbootDruidApplication.class, args);

    }

}

剩余的就是和整合jpa一样的entity（实体类），repository（数据操作层），controller（测试使用的controller），直接展示代码。

City

package com.dalaoyang.entity;

import javax.persistence.*;

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.Entity

 * @email 397600342@qq.com

 * @date 2018/4/7

 */

@Entity

@Table(name="city")

public class City {

    @Id

    @GeneratedValue(strategy=GenerationType.AUTO)

    private int cityId;

    private String cityName;

    private String cityIntroduce;

    public City(int cityId, String cityName, String cityIntroduce) {

        this.cityId = cityId;

        this.cityName = cityName;

        this.cityIntroduce = cityIntroduce;

    }

    public City(String cityName, String cityIntroduce) {

        this.cityName = cityName;

        this.cityIntroduce = cityIntroduce;

    }

    public City() {

    }

    public int getCityId() {

        return cityId;

    }

    public void setCityId(int cityId) {

        this.cityId = cityId;

    }

    public String getCityName() {

        return cityName;

    }

    public void setCityName(String cityName) {

        this.cityName = cityName;

    }

    public String getCityIntroduce() {

        return cityIntroduce;

    }

    public void setCityIntroduce(String cityIntroduce) {

        this.cityIntroduce = cityIntroduce;

    }

}

CityRepository

package com.dalaoyang.repository;

import com.dalaoyang.entity.City;

import org.springframework.data.jpa.repository.JpaRepository;

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.Repository

 * @email 397600342@qq.com

 * @date 2018/4/7

 */

public interface CityRepository extends JpaRepository<City,Integer> {

}

CityController

package com.dalaoyang.controller;

import com.dalaoyang.entity.City;

import com.dalaoyang.repository.CityRepository;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RestController;

/**

 * @author dalaoyang

 * @Description

 * @project springboot_learn

 * @package com.dalaoyang.controller

 * @email 397600342@qq.com

 * @date 2018/4/7

 */

@RestController

public class CityController {

    @Autowired

    private CityRepository cityRepository;

    //http://localhost:8888/saveCity?cityName=北京&cityIntroduce=中国首都

    @GetMapping(value = "saveCity")

    public String saveCity(String cityName,String cityIntroduce){

        City city = new City(cityName,cityIntroduce);

        cityRepository.save(city);

        return "success";

    }

    //http://localhost:8888/deleteCity?cityId=2

    @GetMapping(value = "deleteCity")

    public String deleteCity(int cityId){

        cityRepository.delete(cityId);

        return "success";

    }

    //http://localhost:8888/updateCity?cityId=3&cityName=沈阳&cityIntroduce=辽宁省省会

    @GetMapping(value = "updateCity")

    public String updateCity(int cityId,String cityName,String cityIntroduce){

        City city = new City(cityId,cityName,cityIntroduce);

        cityRepository.save(city);

        return "success";

    }

    //http://localhost:8888/getCityById?cityId=3

    @GetMapping(value = "getCityById")

    public City getCityById(int cityId){

        City city = cityRepository.findOne(cityId);

        return city;

    }

}

然后启动项目，可以看到控制台已经创建了city表。

SpringBoot集成阿里巴巴Druid监控

然后访问http://localhost:8888/druid，可以看到如下图：

SpringBoot集成阿里巴巴Druid监控

输入账号密码admin，admin，如下图

SpringBoot集成阿里巴巴Druid监控

然后这时我们可以访问http://localhost:8888/saveCity?cityName=北京&cityIntroduce=中国首都

然后点击导航上面的SQL监控，如下图，

SpringBoot集成阿里巴巴Druid监控

从上图可以看到启动项目创建表的sql已经刚刚执行的sql。到这里整合已经完成了。

源码下载 ：大老杨码云

个人网站：https://dalaoyang.cn

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