Ajax当中如何回传一个JSP

PassBackJsp
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例 4.1

<%@ page contentType="text/html; charset=GBK"%>
<%@ page language="java"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<style type="text/css">
table.default {
    width:510px;
}
table.default td {
    border:1px solid black;
    height:23px;
}
table.default td.item {
    background:#006589;
    color:#fff;
    text-align:center;
}
</style>

<script type="text/javascript">
var xmlHttp;  
function createXmlHttp() {
    if (window.XMLHttpRequest) {
       xmlHttp = new XMLHttpRequest();                  //FireFox、Opera等浏览器支持的创建方式
    } else {
       xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");//IE浏览器支持的创建方式
    }
}
function refreshCart() {
    createXmlHttp();                    
    xmlHttp.onreadystatechange = showCartIn;
    xmlHttp.open("GET", "cart.jsp" , true);
    xmlHttp.send(null);
}

function showCartIn() {
    if (xmlHttp.readyState == 4) {
/* thus, in this way, it return a jsp,so it is simple.if it return back a Servlet, it is difficult. this is a
very good idea. */
        document.getElementById("shoppingcart").innerHTML = xmlHttp.responseText;
    }
}
</script>
</head>

<body onload="refreshCart()">
<div id="shoppingcart">
</div>
</body>
</html>






cart.jsp

<%@page import="java.util.Date"%>
<%@ page contentType="text/html; charset=GBK"%>
<%@ page language="java"%>

<table class="default">
<tr>
    <td width="35%" class="item">编号</td>
    <td width="20%" class="item">名称</td>
    <td width="15%" class="item">价格</td>
    <td width="15%" class="item">功能</td>
</tr>
          <tr>
                <td>动态数据库获取</td>
                <td align="center"><% out.print("马克-towin"); %></td>
                <td align="center"><% Date t = new Date(); out.print(t); %></td>
                <td align="center"><input type="button" onclick="refreshCart();" value="刷"></td>
            </tr>
        <tr >
             <td>动态数据库获取</td>
             <td>动态数据库获取</td>
             <td align="center">动态数据库获取</td>
             <td>动态数据库获取</td>
        <tr>
            <td colspan="4" style="height:50px" align="center">动态数据库获取</td>
        </tr>
</table>