Tomcat 中Jndi是使用Tomcat自带的连接池
抛弃Tomcat自带的连接池。使用c3p0 。
环境：Tomcat 5.5.20
下面配置只适合Tomcat 5.5.X
下面来看Jndi 与 c3p0 结合：
c3p0 下载地址：
http://nchc.dl.sourceforge.net/sourceforge/c3p0/c3p0-0.9.0.4.bin.zip把 c3p0-0.9.0.4.jar 放到应用服务的WEB-INF/lib目录下。如：DBTest/WEB-INF/lib
1.在server.xml中<Context></Context>内加<Resource />，完整的示例：
<Context path="/DBTest" docBase="DBTest"
debug="5" reloadable="true" crossContext="true">
<Resource auth="Container"
driverClass="com.mysql.jdbc.Driver"
maxPoolSize="50" minPoolSize="2" acquireIncrement="2"
name="jdbc/connPool" user="root" password=""
factory="org.apache.naming.factory.BeanFactory"
type="com.mchange.v2.c3p0.ComboPooledDataSource"
jdbcUrl="jdbc:mysql://localhost:3306/test" />
</Context>
2.在web.xml添加：
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/connPool</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
3.测试页面testConnPool.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<sql:query var="rs" dataSource="jdbc/connPool">
select id, typename from text
</sql:query>
<html>
<head>
<title>DB Test Conn Pool c3p0 and Jndi</title>
</head>
<body>
<h2>Results</h2>
<c:forEach var="row" items="${rs.rows}">
id: ${row.id}<br/>
name: ${row.typename}<br/>
</c:forEach>
</body>
</html>
posted on 2007-03-18 16:46
流浪汗 阅读(2877)
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