Druid 连接池

druid-1.0.14.jar

<!-- druid 数据源 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
		<property name="url" value="${hibernate.connection.url}"/>
		<property name="username" value="${hibernate.connection.username}"/>
		<property name="password" value="${hibernate.connection.password}"/>
		<property name="filters" value="stat,log4j"/>
		<property name="maxActive" value="20" />
		<property name="initialSize" value="1" />
		<property name="maxWait" value="60000" />
		<property name="maxIdle" value="15" />
		<property name="minIdle" value="10" />
		<property name="timeBetweenEvictionRunsMillis" value="60000" />
		<property name="timeBetweenLogStatsMillis" value="300000" />
		<property name="minEvictableIdleTimeMillis" value="300000" />
		<property name="validationQuery" value="SELECT 'x'" />
		<property name="testWhileIdle" value="true" />
		<property name="testOnBorrow" value="false" />
		<property name="testOnReturn" value="false" />
		<property name="maxOpenPreparedStatements" value="20" />
		<!-- 打开removeAbandoned功能 -->
		<property name="removeAbandoned" value="true" />
		<!-- 1800秒，也就是30分钟 -->
		<property name="removeAbandonedTimeout" value="1800" />
		<!-- 关闭abanded连接时输出错误日志 -->
		<property name="logAbandoned" value="true" />
	</bean>

配置文件

DRUID是阿里巴巴开源平台上一个数据库连接池实现，它结合了C3P0、DBCP、PROXOOL等DB池的优点，同时加入了日志监控，可以很好的监控DB池连接和SQL的执行情况，可以说是针对监控而生的DB连接池(据说是目前最好的连接池,不知道速度有没有BoneCP快)。

<!-- Druid,监控数据库,以及WEB访问连接信息 -->
	<!-- 参考: https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_%E9%85%8D%E7%BD%AEWebStatFilter -->
	<filter>
		<filter-name>DruidWebStatFilter</filter-name>
		<filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
		<init-param>
			<param-name>exclusions</param-name>
			<param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,*.jsp,/druid/*,/download/*</param-value>
		</init-param>
		<init-param>
			<param-name>sessionStatMaxCount</param-name>
			<param-value>2000</param-value>
		</init-param>
		<init-param>
			<param-name>sessionStatEnable</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
			<param-name>principalSessionName</param-name>
			<param-value>session_user_key</param-value>
		</init-param>
		<init-param>
			<param-name>profileEnable</param-name>
			<param-value>true</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>DruidWebStatFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<!-- 配置 Druid 监控信息显示页面 -->
	<servlet>
		<servlet-name>DruidStatView</servlet-name>
		<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
		<init-param>
			<!-- 允许清空统计数据 -->
			<param-name>resetEnable</param-name>
			<param-value>true</param-value>
		</init-param>
		<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>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<error-page>
		<error-code>404</error-code>
		<location>/error.jsp</location>
	</error-page>

那么我们可以看到如下界面：