Tomcat6.0 配置外部数据源(JNDI)
Tomcat6.0以上版本配置JNDI，只需修改conf下context.xml文件,在Tomcat目录的lib下加入common-dbcp.jar和数据库jar包
<?xml version='1.0' encoding='utf-8'?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<!-- 新增配置,配置外部数据源 -->
<Resource name="jdbc/DB2source"
auth="Container"
type="javax.sql.DataSource"
url="jdbc:sqlserver://192.168.0.119;DatabaseName=XXXXX"
username="sa"
password="XXXXX."
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
maxIdle="3"
maxWait="-1"
maxActive="50" />
</Context>
参数介绍:
name:给数据源设置名字(jndi)
auth:表示数据源由谁管理
type:类型
maxActive:在连接池中最大的激活连接数
maxIdle:在连接池中最大的保留(空闲)连接数
maxWait:客户端在队列池中最大等待时间(秒)
测试代码(新建Web工程,无法在Main方法中测试):
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page language="java"%>
<%@ page import="java.util.*"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.*"%>
<%@ page import="javax.naming.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>配置 JNDI</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
Tomcat6.0+ 配置 JNDI（common-dbcp.jar,sqljdbc4.jar）
<%
Connection conn=null;
PreparedStatement ps=null;
ResultSet rs=null;
try {
Context ctx = new InitialContext();
Context envContext = (Context) ctx.lookup("java:/comp/env");
DataSource ds = (DataSource) envContext.lookup("jdbc/DB2source");
conn=ds.getConnection();
if (conn == null) {
System.out.println("连接未获取成功...........");
} else {
System.out.println("获取连接............");
}
String sql = "select * from systemusers";
ps=conn.prepareStatement(sql);
rs= ps.executeQuery();
while (rs.next()) {
System.out.println("===============Name:"+rs.getString("userName"));
out.println("===============Name:"+rs.getString("userName")+"\r");
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
if(conn!=null){
conn.close();
}
if(ps!=null){
ps.close();
}
if(rs!=null){
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
%>
</body>
</html>
原文链接地址：http://www.cnblogs.com/archie2010/archive/2011/09/03/2165562.html