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Ajax jQuery method to implement cascading display address_jquery

WBOY
WBOYOriginal
2016-05-16 16:00:311267browse

The example in this article describes how ajax jQuery implements cascading display addresses. Share it with everyone for your reference. The specific implementation method is as follows: 

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"
contentType="text/html; charset=utf-8"
%>
<html>
<head>
 <title>初始化HELLO</title>
 <script type="text/javascript" src="../../js/jquery.js"></script>
 <script type="text/javascript">
 $(document).ready(function(){
  var str1='${str}';
  var strArr=str1.split(",");
  var k;
  for(k=0;k<strArr.length;k++)
   {
   $.ajax({
   async:false,//原来是这样,不然AJAX是一起发送的,加上这个的话,就保证这个请求有结果,才会发下一个请求
   url:'init.action',//请求的URL
   cache: false, //不从缓存中取数据
   data:{pid:strArr[k]},//发送的参数
   type:'Get',//请求类型
   dataType:'json',//返回类型是JSON
   timeout:20000,//超时
   error:function()//出错处理
   {
   alert("程序出错!");
   },
   success:function(json)//成功处理
   {
    var len=json.length;//得到查询到数组长度
   if(strArr[k]=="0")//顶目属地
   {   
    $("<select id='no1' style='width:80px' onchange='show()'></select>").appendTo("#content");//在content中添加select元素
    $("<option value='-1'>请选择</option>").appendTo("#no1");
    for(var i=0;i<len;i++)//把查询到数据循环添加到select中
    {
    $("<option value="+json[i].channelId+">"+json[i].channelName+"</option>").appendTo("#no1");
    }
    }
    else
    {
    $("<select stype='width:80px' onchange='show()'></select>").appendTo("#content");
    $("<option value='-1'>请选择</option>").appendTo("#content>select:last");
    for(var i=0;i<len;i++)
    {
     $("<option value="+json[i].channelId+">"+json[i].channelName+"</option>").appendTo("#content>select:last");
    }
     $("#content>select:eq("+(k-1)+")>option[@value="+strArr[k]+"]").attr("selected","true");//设置选中
     if(len==0)//最后一级,没东西就把它给删除
     {
     $("#content>select:last").remove();
     }
    }
   }
  });
  }//for循环的结尾
 });
 function show()
 {
 var obj=event.srcElement;//取得当前事件的对象,也就是你点了哪个select,这里得到的就是那个对象
 var currentObj=$(obj);//将JS对象转换成jQuery对象,这样才能使用其方法
 var s1=$(obj).nextAll("select");//找到当前点击的后面的select对象
 s1.each(function(i){
 $(this).remove();//循环把它们删除
 });
 var value1=$(obj).val();
 $.ajax({
 url:'init.action',
 cache:false,
 data:{pid:value1},
 type:'Get',
 dataType:'json',
 timeout:20000,
 error:function()
 {
  alert("出错啦");
 },
 success:function(json)
 {
  var len=json.length;
  if(len!=0)
  {
  $("<select style='width:80px' onchange='show()'></select>").appendTo("#content");
   $("<option value='-1'>请选择</option>").appendTo("#content>select:last");
   for(var i=0;i<len;i++)
   {
   $("<option value="+json[i].channelId+">"+json[i].channelName+"</option>").appendTo("#content>select:last");
   }
  }
 }
 });
 }
 </script>
</head>
<body>
 <h1>
 显示管理员信息
 </h1>
<table width="50%" border="1">
<tr>
<td>管理员编号</td><td><input type="text" value="${admin.adminId}"></td>
</tr>
<tr>
<td>管理员帐号</td><td><input type="text" value="${admin.adminAccount}"> </td>
</tr>
<tr>
<td>管理员姓名</td><td><input type="text" value="${admin.adminName}"> </td>
</tr>
<tr>
<td>管理员密码</td><td><input type="text" value="${admin.password}"> </td>
</tr>
<tr>
<td>管理员属地</td><td><input type="text" value="${admin.channelid}"> </td>
</tr>
</table>
 <div id="content"
 style="width: 500px; border: 1px; border-style: solid; background-color: lightblue;">
 </div>
</body>
</html>

I hope this article will be helpful to everyone’s jquery programming design.

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