TA的每日心情 | 开心 2021-3-12 23:18 |
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签到天数: 2 天 [LV.1]初来乍到
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- 一、处理请求的JSP文件 menujsp.jsp
- <%@ page contentType="text/html; charset=GBK" %>
- <%
- //接收浏览器端提交的信息
- String sort=request.getParameter("sort");
- String contents1="";
- String contents2="";
- if(sort.equals("IBM")){
- contents1="IBM笔记本1";
- contents2="IBM笔记本1";
- }else if(sort.equals("SONY")){
- contents1="SONY笔记本1";
- contents2="SONY笔记本2";
- }
- //传回响应数据
- response.setContentType("text/xml; charset=UTF-8");
- response.setHeader("Cache-Control", "no-cache");
- out.println("<response>");
- out.println("<res>" + contents1 + "</res>");
- out.println("<res>" + contents2 + "</res>");
- out.println("</response>");
- out.close(); %>
复制代码
二、发送请求的:menu.HTML
<head>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<LINK href="images/css.css" type=text/css rel=stylesheet>
</head> <script language="javascript">
- var XMLHttpReq;
- var currentSort;
- //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(url) {
- createXMLHttpRequest();
- 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
- updateMenu();
- } else { //页面不正常
- alert("您所请求的页面有异常。");
- }
- }
- }
- //更新菜单函数
- function updateMenu() {
- var res=XMLHttpReq.responseXML.getElementsByTagName("res")
- var subMenu = "";
- for(var i = 0; i < res.length; i++) {
- subMenu = subMenu + " " + res[i].firstChild.data + "
- ";
- }
- currentSort.innerHTML = subMenu;
- }
- // 创建级联菜单函数
- function showSubMenu(obj) {
- currentSort =document.getElementById(obj);
- currentSort.parentNode.style.display = "";
- sendRequest("menujsp.jsp?sort=" + obj);
- }
复制代码 </script> <table style="BORDER-COLLAPSE: collapse" borderColor=#111111
cellSpacing=0 cellPadding=0 width=200 bgColor=#f5efe7 border=0>
<TR>
<TD align=middle bgColor=#dbc2b0 height=19><B>笔记本品牌</B> </TD>
</TR>
<tr>
<td height="20"> <a onClick="showSubMenu("IBM")">IBM</a> </td>
</tr>
<tr style="display:none">
<td height="20" id="IBM"> </td>
</tr>
<tr>
<td height="20"> <a onClick="showSubMenu("SONY")">SONY</a> </td>
</tr>
<tr style="display:none ">
<td id="SONY" height="20"> </td>
</tr>
</table>
源码下载:http://file.javaxxz.com/2014/10/13/055411187.zip |
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