数据连接池使用方法 JADI

<?xml version=‘1.0‘ encoding=‘utf-8‘?>
<Context>
    <WatchedResource>WEB-INF/web.xml</WatchedResource>
    <Resource 
    name="jdbc/oracle"  
    auth="Container" 
    type="javax.sql.DataSource" 
    driverClassName="oracle.jdbc.OracleDriver" 
    url="jdbc:oracle:thin:@localhost:1521:orcl"
    username="system" 
    password="FengZe2012" 
    maxActive="1000" 
    maxIdle="30" 
    maxWait="10000" 
    />
</Context>

<%@page import="java.sql.PreparedStatement"%>
<%@ page language="java" pageEncoding="utf-8"%>
<%@ page import="javax.naming.InitialContext"%>
<%@ page import="javax.naming.Context"%>
<%@ page import="javax.sql.DataSource"%>
<%@ page import="java.sql.Connection"%>
<%
Context ctx = new InitialContext();
DataSource ds = (DataSource)ctx.lookup("java:/comp/env/jdbc/oracle");
Connection conn = ds.getConnection();
PreparedStatement pst = conn.prepareStatement("create table t(t number)");
pst.execute();
pst.close();
conn.close();
out.print(conn);
%>