J2EE配置connection pool

配置代码
===============================================
<Context path="/test" docBase="f:\testweb\"
debug="5" reloadable="true" crossContext="true">

<Logger
className="org.apache.catalina.logger.FileLogger"

prefix="localhost_MysqlTest_log." suffix=".txt"
timestamp="true"/>

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

<ResourceParams name="jdbc/mldn">
<parameter>
<name>factory</name>

<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>5000</value>
</parameter>
<parameter>
<name>username</name>
<value>scott</value>
</parameter>
<parameter>
<name>password</name>
<value>tiger</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:oracle:thin:@localhost:1521:MLDN</value>
</parameter>
  </ResourceParams>
</Context>
===========================

引用代码
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.*"%>
<%@ page import="javax.naming.*"%>
<%!
final String JNDINAME = "java:comp/env/jdbc/mldn" ;
%>
<%
Connection conn = null ;
try
{
// 初始化查找命名空间
Context ctx = new InitialContext() ;
// 找到DataSource
DataSource ds = (DataSource)ctx.lookup(JNDINAME) ;
conn = ds.getConnection() ;
}
catch(Exception e)
{
System.out.println(e) ;
}
%>
<%=conn%>
<%
// 将连接重新放回到池中
conn.close() ;
%>
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tomcat 5.0 +Oracle