Druid 配置及内置监控使用

正式版本下载：
maven中央仓库: http://central.maven.org/maven2/com/alibaba/druid/[/code] 
3. 怎么获取Druid的源码

Druid是一个开源项目，源码托管在github上，源代码仓库地址是 :

https://github.com/alibaba/druid

同时每次Druid发布正式版本和快照的时候，都会把源码打包，你可以从上面的下载地址中找到相关版本的源码

4. 怎么配置maven

Druid 0.1.18 之后版本都发布到maven中央仓库中，所以你只需要在项目的pom.xml中加上dependency就可以了。例如：

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid-version}</version>
</dependency>


也可以选择 Maven仓库查找公共的仓库地址:

http://www.mvnrepository.com/artifact/com.alibaba/druid

5. 怎么打开Druid的监控统计功能

applicationContext.xml 数据源配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"> <description>Spring公共配置文件 </description>
<context:property-placeholder
ignore-resource-not-found="true" location="classpath:spring/jdbc.properties" />

<!-- 使用annotation 自动注册bean,并保证@Required,@Autowired的属性被注入 -->
<context:component-scan base-package="com">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>

<tx:annotation-driven />

<!-- beecell_weixin_card 数据库配置连接开始 -->

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:/sqlmapper/sqlConfig.xml" />
<property name="mapperLocations" value="classpath:/sqlmapper/**/*sqlmapper.xml" />
</bean>

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory" />
<constructor-arg index="1" value="REUSE" />
</bean>

<!-- 事务管理器配置, 使用jdbc事务 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

<!-- spring declarative transaction management -->
<aop:config>
<aop:pointcut id="fooServiceMethods" expression="execution(* com.serviceImpl..*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceMethods" />
</aop:config>

<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="find*" read-only="true" propagation="REQUIRED"/>
<tx:method name="create*" rollback-for="Exception" propagation="REQUIRED" />
<tx:method name="save*" rollback-for="Exception" propagation="REQUIRED" />
<tx:method name="insert*" rollback-for="Exception" propagation="REQUIRED" />
<tx:method name="update*" rollback-for="Exception" propagation="REQUIRED" />
<tx:method name="delete*" rollback-for="Exception" propagation="REQUIRED" />
</tx:attributes>
</tx:advice>

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<!-- Connection Info -->
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.mysql.url}" />
<property name="username" value="${jdbc.mysql.username}" />
<property name="password" value="${jdbc.mysql.password}" />

<!-- Connection Pooling Info -->
<property name="maxActive" value="${druid.maxActive}" />
<property name="minIdle" value="1" />
<property name="defaultAutoCommit" value="false" />
<!-- 连接Idle一个小时后超时 -->
<property name="timeBetweenEvictionRunsMillis" value="3600000" />
<property name="minEvictableIdleTimeMillis" value="3600000" />
<!-- DataSource Druid配置 -->
<property name="validationQuery" value="SELECT SYSDATE() FROM DUAL" />
<property name="testWhileIdle" value="true" />
<property name="poolPreparedStatements" value="true" /><!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
<property name="maxPoolPreparedStatementPerConnectionSize"
value="20" />
<property name="filters" value="stat,config" /><!-- 开启druid监控支持(stat)，SQL防火墙(wall)以及SQL合并(mergeStat) -->
<property name="connectionProperties"
value="druid.stat.slowSqlMillis=2000;config.decrypt=false" /><!-- 慢SQL标准 -->
<property name="removeAbandoned" value="true" /> <!-- 打开removeAbandoned功能 -->
<property name="removeAbandonedTimeout" value="1800" /> <!-- 1800秒，也就是30分钟 -->
<property name="logAbandoned" value="true" /> <!-- 关闭abanded连接时输出错误日志 -->
</bean>
<!-- beecell_weixin_card 数据库配置连接结束 -->

<!-- 使用annotation定义事务 -->
<tx:annotation-driven transaction-manager="transactionManager"
proxy-target-class="true" />

<!-- Druid AOP配置 -->
<bean id="druid-stat-interceptor"
class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
</bean>
<bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"
scope="prototype">
<property name="patterns">
<list>
<value>com.dao.base.*</value>
</list>
</property>
</bean>
<!-- 打开监控 -->
<aop:config>
<aop:advisor advice-ref="druid-stat-interceptor"
pointcut-ref="druid-stat-pointcut" />
</aop:config>
<!-- 打开面向切面工具 -->
<aop:aspectj-autoproxy />

</beans>


web.xml 配置

<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
<init-param>
<!-- 用户名 -->
<param-name>loginUsername</param-name>
<param-value>druid</param-value>
</init-param>
<init-param>
<!-- 密码 -->
<param-name>loginPassword</param-name>
<param-value>druid</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>


访问地址：

http://127.0.0.1:8080/项目/druid/index.html



参考文档：

配置_StatFilter：  https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter

常见问题：     https://github.com/alibaba/druid/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98