如何实现AJAX下拉框省、市二级联动

本篇内容介绍了"如何实现AJAX下拉框省、市二级联动"的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

jsp页面代码：

复制代码 代码如下:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>







省：
请选择

市：

servlet代码：

复制代码 代码如下:

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String province=request.getParameter("province");
if(province!=null){
sendCity(request,response,province);
}else{
ShengDao sd=new ShengDao();
List list=sd.selAll();
response.setCharacterEncoding("utf-8");
PrintWriter out=response.getWriter();
response.setContentType("text/xml");
out.println("");
out.println("");
for (Sheng sheng : list) {
out.print(""+sheng.getProvince()+"");
out.println();
}
out.println("");
}
}

public void sendCity(HttpServletRequest request, HttpServletResponse response,String shorter){
try {
request.setCharacterEncoding("utf-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
try {
response.setCharacterEncoding("utf-8");
PrintWriter out=response.getWriter();
response.setContentType("text/xml");
ShengDao sd=new ShengDao();
List list=sd.selAll(shorter);
out.println("");
out.println("");
for (City city : list) {
out.println(""+city.getCityname()+"");
System.out.println(""+city.getCityname()+"");
}
out.println("");
} catch (IOException e) {
e.printStackTrace();
}
}

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