当前位置：网站首页 > 网页前端技术 > 正文

jQuery+jsp实现省市县三级联动效果(附源码) - Web前端

作者：98wpeu发布时间：2026-08-10分类：网页前端技术浏览：1

导读：本文实例讲述了JQuery+JSp实现省市县三级联动效果的方法。分享给大家供大家参考，具体如下：在这里，用mysql数据库存储了全国所有的省市县地区信息(点击此处下载源代码)使...

本文实例讲述了JQuery+JSp实现省市县三级联动效果的方法。分享给大家供大家参考，具体如下：

在这里，用mysql数据库存储了全国所有的省市县地区信息(点击此处下载源代码)

使用过的jar包

google的Gson.jar
MySQL-connector-java-5.1.13-bin.jar

将实验图贴出来：

显示页面index.jsp

<%@ page language="Java" import="java.util.*" pageEncoding="UTF-8"%>
<%
string path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCtype html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
 <base href="<%=basePath%>"> 
 <title>省市区三级联动下拉菜单</title>
 <script type="text/javascript" src="<%=path %>/js/jQuery/jquery-1.7.min.js"></script>
 <script type="text/JavaScript" src="<%=path %>/js/json/JSON-minified.js"></script>
 </head>
 <body>
 <table>
 <tr>
 <td>
 省份：
 <select name="PRovince" id="province" onchange="onSelectChange(this,'city');"></select>
 城市：
 <select name="city" id="city" onchange="onSelectChange(this,'district');">
  <option value="">请选择</option>
 </select>
 区(县)：
 <select name="district" id="district">
  <option value="">请选择</option>
 </select>
 </td>
 </tr>
 </table>
 </body>
</html>
<script type="text/Javascript">
function onSelectChange(obj,toSelId){
 setSelect(obj.value,toSelId);
}
function setSelect(fromSelVal,toSelId){
 //alert(document.getElementById("province").selectedIndex);
 document.getElementById(toSelId).innerHTML="";
 jquery.Ajax({
  url: "<%=path%>/getDropdowndataServlet",
  CAChe: false,
  data:"parentId="+fromSelVal,
  success: function(data){
  createSelectObj(data,toSelId);
  }
 });
}
function createSelectObj(data,toSelId){
 var arr = JSONParse(data);
 if(arr != null && arr.length>0){
  var obj = document.getElementById(toSelId);
  obj.innerHTML="";
  var NullOp = document.createElement("option");
  nullOp.setAttribute("value","");
  nullOp.appendChild(document.createTextnode("请选择"));
  obj.appendChild(nullOp);
  for(var o in arr){
   var op = document.createElement("option");
   op.setattribute("value",arr[o].id);
   //op.text=arr[o].name;//这一句在IE下不起作用，用下面这一句或者innerHTML
   op.APPendChild(document.createTextNode(arr[o].name));
   obj.appendChild(op);
  }
 }
}
setSelect('1','province');
</script>

数据库交互GetDropdownDataServlet

public class GetDropdownDataServlet extends httpservlet {
 public void doGet(HTTPServletRequest request, httpServletResponse response)
   throws IOException, ServletException {
  dopost(request, response);
 }
 public void doPost(HTTPServletRequest request, HttpServletResponse response)
   throws IOException, ServletException {
  String parentId = request.getParameter("parentId");
  if (parentId == null || parentId == "") {
   parentId = "0";
  }
  Connection conn = null;
  String json = "";
  try {
   Class.forName("com.mysql.jdbc.Driver");
   conn = DriverManager.getConnection("jdbc:mysql://localhost/dropdown",
     "root", "root");
   Statement stat = conn.createStatement();
   ResultSet rs = stat
     .executeQuery("select region_id,region_name from region where parent_id = "
       + parentId);
   Arraylist rsList = new arrayList();
   map map = null;
   while (rs.next()) {
    map = new HashMap();
    map.put("id", rs.getint(1));
    map.put("name", rs.getString(2));
    rsList.add(map);
   }
   rs = null;
   Gson gson = new Gson();
   json = gson.toJson(rsList);
   System.out.println("json=" + json);
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (SQLException e) {
   e.printStackTrace();
  } finally {
   if (conn != null) {
    try {
     conn.close();
    } catch (SQLException e) {
     e.printStackTrace();
    }
   }
  }
  response.setcharacterEncoding("UTF-8");
  response.getWriter().print(json);
 }
}

希望本文所述对大家JQuery程序设计有所帮助。

标签：省市源码效果 Web jsp jQuery

上一篇：基于Jquery实现仿百度百科右侧导航代码附源码下载 - Web前端
下一篇：jquery实现移动端点击图片查看大图特效 - Web前端

jQuery+jsp实现省市县三级联动效果(附源码) - Web前端

相关推荐