Juqery 级联菜单

转：
http://www.blogjava.net/Reg/archive/2009/11/15/302383.html


DemoServlet


package com.common;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class DemoTest extends HttpServlet {


private IDemo demo=new Demo();

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doPost(request, response);
}


public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
int id=Integer.parseInt(request.getParameter("id"));
List list=demo.query(id);
String json="";
for (int i = 0; i < list.size(); i++) {
json+=list.get(i)+",";
}
System.out.println(json);
out.write(json);
out.flush();
out.close();
}

}


Demo.jsp




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