SpringBoot集成阿里巴巴Druid监控的示例代码

SpringBoot集成阿里巴巴Druid监控的示例代码

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：

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

4.0.0

com.dalaoyang

springboot_druid

0.0.1-SNAPSHOT

jar

springboot_druid

springboot_druid

org.springframework.boot

spring-boot-starter-parent

1.5.12.RELEASE

UTF-8

UTF-8

1.8

org.springframework.boot

spring-boot-starter-data-jpa

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-devtools

runtime

mysql

mysql-connector-java

runtime

org.springframework.boot

spring-boot-starter-test

test

com.alibaba

druid

1.0.28

org.springframework.boot

spring-boot-maven-plugin

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

4.0.0

com.dalaoyang

springboot_druid

0.0.1-SNAPSHOT

jar

springboot_druid

springboot_druid

org.springframework.boot

spring-boot-starter-parent

1.5.12.RELEASE

UTF-8

UTF-8

1.8

org.springframework.boot

spring-boot-starter-data-jpa

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-devtools

runtime

mysql

mysql-connector-java

runtime

org.springframework.boot

spring-boot-starter-test

test

com.alibaba

druid

1.0.28

org.springframework.boot

spring-boot-maven-plugin

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 validathttp://ionQuery;

@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.cithttp://yName = 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 {

}

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。

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

输入账号密码admin，admin，如下图

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，

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 ：https://gitee.com/dalaoyang/springboot_learn

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