Druid连接池简单入门配置

偶尔的机会解释Druid连接池，后起之秀，但是评价不错，另外由于是阿里淘宝使用过的所以还是蛮看好的。

Druid集连接池，监控于一体整好复合当前项目的需要，项目是ssh结构，之前是用C3p0的，现在换一个连接池也是很简单的，首先spring配置DataSource，配置如下：

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<</span>bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">

<</span>property name="url" value="${jdbc_url}" />

<</span>property name="username" value="${jdbc_user}" />

<</span>property name="password" value="${jdbc_password}" />

<</span>property name="initialSize" value="1" />

<</span>property name="minIdle" value="1" />

<</span>property name="maxActive" value="20" />

<</span>property name="maxWait" value="60000" />

<</span>property name="timeBetweenEvictionRunsMillis" value="60000" />

<</span>property name="minEvictableIdleTimeMillis" value="300000" />

<</span>property name="validationQuery" value="SELECT 'x'" />

<</span>property name="testWhileIdle" value="true" />

<</span>property name="testOnBorrow" value="false" />

<</span>property name="testOnReturn" value="false" />

<</span>property name="poolPreparedStatements" value="true" />

<</span>property name="maxPoolPreparedStatementPerConnectionSize" value="20" />

<</span>property name="filters" value="stat" />

</</span>bean>

目前这样的配置已经能够使用连接池，注意不要忘记了jar文件，下载地址：http://code.alibabatech.com/mvn/releases/com/alibaba/druid/

然后是监控的配置：

web.xml

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<</span>span style="white-space:pre"> </</span>span><</span>filter>

<</span>filter-name>DruidWebStatFilter</</span>filter-name>

<</span>filter-class>com.alibaba.druid.support.http.WebStatFilter</</span>filter-class>

<</span>init-param>

<</span>param-name>exclusions</</span>param-name>

<</span>param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</</span>param-value>

</</span>init-param>

</</span>filter>

<</span>filter-mapping>

<</span>filter-name>DruidWebStatFilter</</span>filter-name>

<</span>url-pattern>/*</</span>url-pattern>

</</span>filter-mapping>

filter可以监控webURl 访问

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<</span>span style="white-space:pre"> </</span>span><</span>servlet>

<</span>servlet-name>DruidStatView</</span>servlet-name>

<</span>servlet-class>com.alibaba.druid.support.http.StatViewServlet</</span>servlet-class>

</</span>servlet>

<</span>servlet-mapping>

<</span>servlet-name>DruidStatView</</span>servlet-name>

<</span>url-pattern>/druid/*</</span>url-pattern>

</</span>servlet-mapping>

该配置可以访问监控界面

配置好后访问 http://ip：port/projectName/druid/index.html
经过上面的配置，我们已经能够达到连接池的使用和监控，这个只是简单的入门，如果还要更详细的学习，还得论坛上多多交流。