一、JSP文件：auto.jsp <%@ page contentType="text/html; charset=gb2312" %>
<% //设置输出信息的格式及字符集 response.setContentType("text/xml; charset=UTF-8"); response.setHeader("Cache-Control","no-cache"); out.println("<response>"); for(int i=0;i<2;i++){ out.println("<name>"+(int)(Math.random()*10)+"型笔记本</name>"); out.println("<count>" +(int)(Math.random()*100)+ "</count>"); } out.println("</response>"); out.close();
%>
二、html文件：autoRefresh.html<head> <META http-equiv=Content-Type content="text/html; charset=gb2312"></head><script language="javascript"> var XMLHttpReq; //创建XMLHttpRequest对象 function createXMLHttpRequest() { if(window.XMLHttpRequest) { //Mozilla 浏览器 XMLHttpReq = new XMLHttpRequest(); } else if (window.ActiveXObject) { // IE浏览器 try { XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {} } } } //发送请求函数 function sendRequest() { createXMLHttpRequest(); var url = "auto.jsp"; XMLHttpReq.open("GET", url, true); XMLHttpReq.onreadystatechange = processResponse;//指定响应函数 XMLHttpReq.send(null); // 发送请求 } // 处理返回信息函数 function processResponse() { if (XMLHttpReq.readyState == 4) { // 判断对象状态 if (XMLHttpReq.status == 200) { // 信息已经成功返回，开始处理信息 DisplayHot(); setTimeout("sendRequest()", 1000); } else { //页面不正常 window.alert("您所请求的页面有异常。"); } } } function DisplayHot() { var name = XMLHttpReq.responseXML.getElementsByTagName("name")[0].firstChild.nodeValue; var count = XMLHttpReq.responseXML.getElementsByTagName("count")[0].firstChild.nodeValue; document.getElementById("product").innerHTML = name; document.getElementById("count").innerHTML = count; }
</script>
<body onload =sendRequest()><table style="BORDER-COLLAPSE: collapse" borderColor=#111111 cellSpacing=0 cellPadding=0 width=200 bgColor=#f5efe7 border=0> <TR> <TD align=middle height=4 colspan="2"><IMG height=4 src="images/promo_list_top.gif" width="100%" border=0> </TD> </TR> <TR> <TD align=middle bgColor=#dbc2b0 height=19 colspan="2"><B>正在热卖的笔记本</B> </TD> </TR> <tr> <td height="20"> 型号： </td> <td height="20" id="product"> </td> </tr> <tr> <td height="20"> 销售数量： </td> <td height="20" id="count"> </td> </tr></body> </table>
