用struts实现动态联动下拉框的问题－－－请熟悉这方面的高手务必进来看一下，谢谢

用ajax啊，留下mail，给你例子

解决方案 »

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ajax是什么？－－我还没有用过啊我的email:[email protected]   先谢谢了
我贴出来算了，不过那样要自己部署servlet
html代码：html:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>MyHtml.html</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page"></head>
<script type="text/javascript">
function getResult(stateVal) {
        var url = "servlet/SelectCityServlet?state="+stateVal;
        if (window.XMLHttpRequest) {
                req = new XMLHttpRequest();
        }else if (window.ActiveXObject) {
                req = new ActiveXObject("Microsoft.XMLHTTP");
        }
        if(req){
                req.open("GET",url, true);
                req.onreadystatechange = complete;
                req.send(null);
        }
}
function complete(){
        if (req.readyState == 4) {
                if (req.status == 200) {
                        var city = req.responseXML.getElementsByTagName("city");
                        alert(city.length);
                        var str=new Array();
                        for(var i=0;i<city.length;i++){
                                str[i]=city[i].firstChild.data;
                        }
                        alert(document.getElementById("city"));
                        buildSelect(str,document.getElementById("city"));
                }
        }
}
function buildSelect(str,sel) {
        sel.options.length=0;
        for(var i=0;i<str.length;i++) {
                sel.options[sel.options.length]=new Option(str[i],str[i])
        }
}
function test(){
        alert("test");
}
</script>
<body>
不变的静止内容
<BR />
<BR />
<select name="state" onChange="getResult(this.value)">
<option value="">请选择</option>
<option value="zj">浙江</option>
<option value="zs">江苏</option>
</select>
<select id="city"></select>
<BR />
<BR />
不用重新刷新
</body>
</html>
Servlet代码：package com.stephen.servlet;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/**
* @author stephen
*
* TODO To change the template for this generated type comment go to Window -
* Preferences - Java - Code Style - Code Templates
*/
public class SelectCityServlet extends HttpServlet { public SelectCityServlet() {
super();
} public void destroy() {
super.destroy();
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/xml");
response.setCharacterEncoding("UTF-8");
response.setHeader("Cache-Control", "no-cache");
String state = request.getParameter("state");
StringBuffer sb = new StringBuffer("<state>");
if ("zj".equals(state)) {
sb.append("<city>杭州</city><city>湖州</city>");
} else if ("zs".equals(state)) {
sb.append("<city>南京</city><city>扬州</city><city>苏州</city>");
}
sb.append("</state>");
PrintWriter out = response.getWriter();
out.write(sb.toString());
out.close();
}}我这个servlet数据是写死的，你可以从数据库取了写灵活的，自己部署一个小项目可以看看结果
不行啊，servlet类编译后，然后运行，没有反应啊！
我改动的唯一地方就是将var url = "servlet/SelectCityServlet?state="+stateVal; 改为了
var url = "com/servlet/SelectCityServlet?state="+stateVal; //com为我编译的路径
晕，servlet要配置在web服务器下的啊，又不是javac编译了就能跑的
算了，我还是压个rar给你吧，解压后放到tomcat/webapps下面，跑起来看
樓上的給我一份rar吧，mail：[email protected]
最好能放到哪可以下載。因為公司不能收外部mail.
mail已发，内容是个eclipse做的项目，导进去部署一下就可以了
to li_d_s(我是小鬼-日货？送我都不要，哪怕是丰田和日产的轿车！)
我没有收到附件啊，是不是附件很大？－－我给你写了回信
你是我的恩人！！！请也我一份rar
[email protected]