Ajax实现动态加载组合框的实例代码

一  province.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 
  
   
   
  
  
   

    

     
省份：
    

     
      广东
广西
湖南
      湖北
      安徽
     
    
    
   

    
城市：
    

     
--请选择--
     
    
    
   
 
  

二、CityByXMLServlet.java

package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/CityByXMLServlet")
public class CityByXMLServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;
  private static final String CONTENT_TYPE = "text/xml; charset=UTF-8";
  
  public CityByXMLServlet() {
    super();
    // TODO Auto-generated constructor stub
  }
 
  public void doGet(HttpServletRequest request, HttpServletResponse response)
  throws ServletException, IOException {
      response.setContentType(CONTENT_TYPE); //设置服务器响应类型
String province =request.getParameter("province");
StringBuffer city = new StringBuffer(""); //记录返回XML串的对象
if("gx".equals(province)){
List list=cityInit(); //获取城市列表
 for(int i=0;i"+list.get(i)+"");
 }      
}else if("hn".equals(province)){
List list = cityInit1(); //获取城市列表
for(int j=0;j"+list.get(j)+"");
}
 }else if("hb".equals(province)){
 List list = cityInit2(); //获取城市列表
 for(int j=0;j"+list.get(j)+"");
 } 
}
      city.append("");
      PrintWriter out = response.getWriter();
      out.println(city.toString());
      out.flush(); //输出流刷新
      out.close(); //关闭输出流
     }
     
  public List cityInit2() {
    List cityList = new ArrayList();
   //添加城市列表
    cityList.add("武汉");
    cityList.add("襄阳");
    cityList.add("黄冈");
    cityList.add("荆门");
    cityList.add("十堰");
    cityList.add("黄石");
    return cityList;
  }
     public List cityInit(){
List cityList = new ArrayList();
     //添加城市列表
cityList.add("南宁");
cityList.add("桂林");
cityList.add("北海");
cityList.add("河池");
cityList.add("梧州");
cityList.add("玉林");
    return cityList;
   }
    public List cityInit1() {
    List cityList = new ArrayList();
   //添加城市列表
    cityList.add("长沙");
    cityList.add("湘潭");
    cityList.add("岳阳");
    cityList.add("常德");
    cityList.add("衡阳");
    cityList.add("邵阳");
    return cityList;
  }
    
    public void init() throws ServletException {
    }
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 doGet(request, response);
 }
}

三 web.xml

  CityByXMLServlet
  servlet.CityByXMLServlet


  CityByXMLServlet
  /CityByXMLServlet

总结

以上所述是小编给大家介绍的Ajax实现动态加载组合框的实例代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！