参考网页

为何要集成Druid

性能

    官方数据Benchmark_aliyun,druid在响应时间上优于其他几个线程池。非官方的测试数据可能差距没这么明显，但仍然高于其他几个线程池。

自带监控功能

    自带监控，可帮助开发者找出慢查询，查看并发数等。

步骤1--pom文件中加入Druid依赖

    
    
     
      com.alibaba
     
     
      druid
     
     
      1.0.31
     
    
    

 

步骤2--在application.properties配置文件中加入druid配置

############################################# Druid参数# 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  # 校验SQL，Oracle配置 spring.datasource.validationQuery=SELECT 1 FROM DUAL，如果不配validationQuery项，则下面三项配置无用  spring.datasource.validationQuery=SELECT 'x'  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  spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000  # 合并多个DruidDataSource的监控数据  spring.datasource.useGlobalDataSourceStat=true

 

步骤3--配置WebFilter【过滤不需要监控的后缀】

package com.richfit.ruiche.common.druidConfig;import javax.servlet.annotation.WebFilter;  import javax.servlet.annotation.WebInitParam;    import com.alibaba.druid.support.http.WebStatFilter;    @WebFilter(filterName="druidStatFilter",urlPatterns="/*",  initParams={          @WebInitParam(name="exclusions",value="*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")// 忽略资源  })  public class DruidStatFilter extends WebStatFilter {    }

 

步骤4--配置WebServlet【监控视图配置】

package com.richfit.ruiche.common.druidConfig;import javax.servlet.annotation.WebInitParam;  import javax.servlet.annotation.WebServlet;    import com.alibaba.druid.support.http.StatViewServlet;    @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="192.168.0.0"),// IP黑名单 (存在共同时，deny优先于allow)          @WebInitParam(name="loginUsername",value="admin"),// druid监控页面登陆用户名          @WebInitParam(name="loginPassword",value="admin"),// druid监控页面登陆密码          @WebInitParam(name="resetEnable",value="false")// 禁用HTML页面上的“Reset All”功能  })  public class DruidStatViewServlet extends StatViewServlet {        /**       *        */      private static final long serialVersionUID = 1L;    }

步骤5--不使用spring boot自动配置功能，手动初始化DataSource

package com.richfit.ruiche.common.druidConfig;import java.sql.SQLException;  import javax.sql.DataSource;    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;    /** *   * 描述：如果不使用代码手动初始化DataSource的话，监控界面的SQL监控会没有数据("是spring boot的bug???") * @author chhliu  * 创建时间：2017年2月9日 下午10:33:08 * @version 1.2.0 */  @Configuration  public class DruidConfiguration {      @Value("${spring.datasource.url}")      private String dbUrl;      @Value("${spring.datasource.username}")      private String username;      @Value("${spring.datasource.password}")      private String password;  //    @Value("${spring.datasource.driverClassName}")      @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("${spring.datasource.connectionProperties}")      private String connectionProperties;      @Value("${spring.datasource.useGlobalDataSourceStat}")      private boolean useGlobalDataSourceStat;        @Bean     //声明其为Bean实例      @Primary  //在同样的DataSource中，首先使用被标注的DataSource      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);          datasource.setUseGlobalDataSourceStat(useGlobalDataSourceStat);          try {              datasource.setFilters(filters);          } catch (SQLException e) {              System.err.println("druid configuration initialization filter: "+ e);          }          datasource.setConnectionProperties(connectionProperties);          return datasource;      }  }

 

步骤6--主启动类上设置扫描Servlet

package com.richfit.ruiche;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.boot.web.servlet.ServletComponentScan;import org.springframework.scheduling.annotation.EnableAsync;import org.springframework.scheduling.annotation.EnableScheduling;import com.richfit.ruiche.common.globalSetting.RunEnvSetting;import com.richfit.ruiche.framework.threadPool.TaskThreadPoolConfig;import com.richfit.ruiche.util.EMailConfig;//@SpringBootApplication(exclude = SpringDataWebAutoConfiguration.class)//@EnableConfigurationProperties({EMailConfig.class,SSLEMailConfig.class,WebVersion.class})@SpringBootApplication@EnableConfigurationProperties({EMailConfig.class,RunEnvSetting.class,TaskThreadPoolConfig.class})  //@RestController//@Configuration  //@ComponentScan(basePackages = "com.richfit.ruiche")//@EnableAutoConfiguration@EnableScheduling//@EnableCaching//开启对异步任务的支持@EnableAsync//注意要加上@ServletComponentScan注解，否则Servlet无法生效 -----Druid监控@ServletComponentScanpublic class RichfitCBMRest {    public static void main(String[] args) {        SpringApplication.run(RichfitCBMRest.class, args);           //打印系统中定义的服务类     // ApplicationContext ctx = SpringApplication.run(RichfitCBMRest.class,// args);// String[] beanNames = ctx.getBeanNamesForAnnotation(Service.class);// System.out.println("Service注解beanNames个数：" + beanNames.length);//// for (String bn : beanNames) {// System.out.println(bn);// }//// System.out.println("打印结束");    }}

测试

监控页面登录地址

Sql监控

可以看到sql监控页面已经监控到sql语句

Uri监控

Uri监控页面，可以看到监控到了刚才访问的uri地址：

/LoginService/login