springBoot（12）：集成Druid

一、添加依赖

<!--mybatis-开始-->
<dependency>
   <groupId>org.mybatis.spring.boot</groupId>
   <artifactId>mybatis-spring-boot-starter</artifactId>
   <version>1.2.0</version>
</dependency>
<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <scope>runtime</scope>
</dependency>
<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId >druid</artifactId>
   <version>1.0.26</version>
</dependency>
<!--mybatis-结束-->

二、配置application.properties

##################################mysql数据源配置##################################
spring.datasource.url=jdbc:mysql://localhost/db_test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#druid连接池
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

注意：其实到这里就可以正常使用了，但是如果想使用druid里的诸多属性，则需要添加支持类

三、添加druid的支持类

package com.example.demo.utils.configuration.druid;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DatabaseDriver;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.alibaba.druid.pool.DruidDataSource;

/**
 * druid的支持类
 * @Author: 我爱大金子
 * @Description: druid的支持类
 * @Date: Created in 12:48 2017/6/20
 */
@Configuration
public class DruidConfiguration {
    @ConditionalOnClass(DruidDataSource.class)
    @ConditionalOnProperty(name = "spring.datasource.type", havingValue = "com.alibaba.druid.pool.DruidDataSource", matchIfMissing = true)
    static class Druid extends DruidConfiguration {
        @Bean
        @ConfigurationProperties("spring.datasource.druid")
        public DruidDataSource dataSource(DataSourceProperties properties) {
            DruidDataSource druidDataSource = (DruidDataSource)
                    properties.initializeDataSourceBuilder().type(DruidDataSource.class).build();
            DatabaseDriver databaseDriver =
                    DatabaseDriver.fromJdbcUrl(properties.determineUrl());
            String validationQuery = databaseDriver.getValidationQuery();
            if (validationQuery != null) {
                druidDataSource.setValidationQuery(validationQuery);
            }
            return druidDataSource;
        }
    }
}

配置application.properties：

##################################mysql数据源配置##################################
spring.datasource.url=jdbc:mysql://localhost/db_test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#初始化连接大小
spring.datasource.druid.initial-size=8
#最小空闲连接数
spring.datasource.druid.min-idle=5
#最大连接数
spring.datasource.druid.max-active=10
#查询超时时间
spring.datasource.druid.query-timeout=6000
#事务查询超时时间
spring.datasource.druid.transaction-query-timeout=6000
#关闭空闲连接超时时间
spring.datasource.druid.remove-abandoned-timeout=1800

四、监控

4.1、配置servlet

package com.example.demo.utils.configuration.druid;

import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import com.alibaba.druid.support.http.StatViewServlet;

/**
 * 监控-配置servlet
 * @Author: 我爱大金子
 * @Description: 监控-servlet
 * @Date: Created in 12:50 2017/6/20
 */
@WebServlet(urlPatterns = { "/druid/*" }, initParams =
        { @WebInitParam(name = "loginUsername", value = "liuy"),
          @WebInitParam(name = "loginPassword", value = "123456") })
public class DruidStatViewServlet extends StatViewServlet {
    private static final long serialVersionUID = 1L;
}

4.2、配置filter

package com.example.demo.utils.configuration.druid;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import com.alibaba.druid.support.http.WebStatFilter;

/**
 * 监控-配置filter
 * @Author: 我爱大金子
 * @Description: 描述
 * @Date: Created in 12:51 2017/6/20
 */
@WebFilter(filterName = "druidWebStatFilter", urlPatterns = "/*", initParams = { @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*") })
public class DruidWebStatFilter extends WebStatFilter {
}

测试：访问http://localhost:9090/druid/index.html

注意：此时还没有SQL监控与spring监控。

4.3、配置sql监控与spring监控

在application.properties文件中配置sql监控

#sql监控配置:filter类名:stat,config,encoding,logging
spring.datasource.druid.filters=stat

spring监控配置

第一步：新建一个配置文件，如：druid-bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop.xsd">

   <!-- 配置_Druid和Spring关联监控配置 -->
   <bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"></bean>

   <!-- 方法名正则匹配拦截配置 -->
   <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
      <property name="patterns">
         <list>
            <value>com.example.demo.mapper.*</value>
         </list>
      </property>
   </bean>

   <aop:config proxy-target-class="true">
      <aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
   </aop:config>
</beans>

第二步：在启动类上加载druid-bean.xml文件

package com.example.demo;

import com.example.demo.utils.filter.CustomFilter;
import com.example.demo.utils.listener.CustomListener;
import com.example.demo.utils.servlet.CustomServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ImportResource;

import javax.servlet.DispatcherType;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.util.EnumSet;

@ServletComponentScan
@SpringBootApplication
@ImportResource(locations = { "classpath:druid-bean.xml" })
public class SpringbootDemo27Application {
   public static void main(String[] args) {
      SpringApplication.run(SpringbootDemo27Application.class, args);
   }
}

重启服务，报异常：

解决：添加aop依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

重启服务