java中配置数据库连接池总结

java中配置数据库连接池总结

在tomcat下配置mysql数据源

1.1 配置server.xml

在tomcat5.0-->conf-->server.xml的<host></host>标记中加入以下代码:

<Context path="/hibernate_test" reloadable="true" docBase="E:\testeclipse\workspace\myhibernate_test\hibernate_test" workDir="E:\testeclipse\workspace\myhibernate_test\work">

<Resource name="jdbc/list" auth="Container" type="javax.sql.DataSource"/>

<ResourceParams name="jdbc/list">

<parameter>

<name>factory</name>

<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>

</parameter>

<parameter>

<name>driverClassName</name>

<value>org.gjt.mm.mysql.Driver</value>

</parameter>

<parameter>

<name>url</name>

<value>jdbc:mysql://10.71.0.187:8000/test?characterEncoding=gbk</value>

</parameter>

<parameter>

<name>username</name>

<value>omnipay</value>

</parameter>

<parameter>

<name>password</name>

<value>omnipay</value>

</parameter>

<parameter>

<name>maxActive</name>

<value>20</value>

</parameter>

<parameter>

<name>maxIdle</name>

<value>20</value>

</parameter>

<parameter>

<name>maxWait</name>

<value>-1</value>

</parameter>

</ResourceParams>

</Context>

或者在Tomcat 5.0\conf\Catalina\localhost目录下添加一个和web项目同名的一个xml文件,内容如下:

<Context path="/list_test" reloadable="true" docBase="list_test">

<Resource name="jdbc/list" auth="Container" type="javax.sql.DataSource"/>

<ResourceParams name="jdbc/list">

<parameter>

<name>factory</name>

<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>

</parameter>

<parameter>

<name>initialSize</name>

<value>5</value>

</parameter>

<parameter>

<name>maxActive</name>

<value>20</value>

</parameter>

<parameter>

<name>maxIdle</name>

<value>10</value>

</parameter>

<parameter>

<name>minIdle</name>

<value>5</value>

</parameter>

<parameter>

<name>timeBetweenEvictionRunsMillis</name>

<value>300000</value>

</parameter>

<parameter>

<name>maxWait</name>

<value>10000</value>

</parameter>

<parameter>

<name>removeAbandoned</name>

<value>true</value>

</parameter>

<parameter>

<name>removeAbandonedTimeout</name>

<value>60</value>

</parameter>

<parameter>

<name>logAbandoned</name>

<value>false</value>

</parameter>

<parameter>

<name>username</name>

<value>omnipay</value>

</parameter>

<parameter>

<name>password</name>

<value>omnipay</value>

</parameter>

<parameter>

<name>driverClassName</name>

<value>com.mysql.jdbc.Driver</value>

</parameter>

<parameter>

<name>url</name>

<value>jdbc:mysql://10.71.0.187:8000/test?characterEncoding=gbk</value>

</parameter>

</ResourceParams>

</Context>

或者在struts_config.xml中添加以下代码:

<data-sources >

<data-source key="org.apache.struts.action.DATA_SOURCE" type="org.apache.commons.dbcp.BasicDataSourceFactory">

<set-property property="password" value="omnipay" />

<set-property property="minCount" value="" />

<set-property property="maxCount" value="" />

<set-property property="user" value="omnipay" />

<set-property property="driverClass" value="com.mysql.jdbc.Driver" />

<set-property property="description" value="jdbc/jndi" />

<set-property property="url" value="http://localhost:8000/test" />

<set-property property="readOnly" value="false" />

<set-property property="autoCommit" value="false" />

<set-property property="loginTimeout" value="" />

</data-source>

</data-sources>

1.2 配置web.xml

在web.xml中添加以下代码:

<web-app>

<description>MySQL Test App</description>

<resource-ref>

<description>DB Connection</description>

<res-ref-name>jdbc/TestDB</res-ref-name>

<res-type>javax.sql.DataSource</res-type>

<res-auth>Container</res-auth>

</resource-ref>

</web-app>

1.3 访问数据库的java代码

DbConnection.java

import java.sql.Connection;

import java.sql.SQLException;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.sql.DataSource;

写一个数据库访问类

1.4 写一个action类及jsp页面测试一下就OK了