SpringBoot如何集成Druid监控
小编给大家分享一下SpringBoot如何集成Druid监控,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
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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:
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("${spring.datasource.validationQuery}") private String validationQuery; @Value("${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{ }
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。
看完了这篇文章,相信你对“SpringBoot如何集成Druid监控”有了一定的了解,如果想了解更多相关知识,欢迎关注创新互联行业资讯频道,感谢各位的阅读!
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