数据连接池使用方法 JADI

1、编写context.xml 文件复制到 WebRoot/META_INF/context.xml

<?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>

2、复制相关的数据库jar文件到 WebRoot/WEB-INF/lib/目录下

3、 使用连接代码

<%@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);
%>