自动补齐flexselect+级联下拉框案例

在开发web应用时，经常遇到类似省市区级联下拉框操作，即选中省份自动级联加载该省份所有的市，选中市自动级联加载该市所有的区；假设省市区的数据量很大，此时用户想选中某市，因而要从上往下查找，可能半天都找不到，用户体验不佳，因此引入jQuery插件–自动补齐flexselect可解决该弊端，因为该插件支持模糊检索自动补齐，可在极短时间内找到想要的结果，节省了时间又增强了用户操作速度。

自动补齐flexselect插件用法请看：http://www.tieguanyin168.com/index.php/jqueryflexselect-1505.html

以下模拟省市区级联案例，效果如下：

源码：
1、服务器端代码

public void queryCity() {
 String grade=this.getParameter("grade");
 List<City> models = cityService.searchCitiesByPid(Integer.valueOf(grade));
 if(models!=null&&models.size()>0){
     //{"code":200,"data":[{"acronym":"LCQ","areaCode":"","fullName":"福建省泉州市鲤城区","grade":3,"id":1463,"isDel":0,"name":"鲤城区","pid":162,"sellQuantity":0,"signQuantity":0,"zipCode":""},
            //        {"acronym":"NAS","areaCode":"","fullName":"福建省泉州市南安市","grade":3,"id":1474,"isDel":0,"name":"南安市","pid":162,"sellQuantity":0,"signQuantity":0,"zipCode":""}],
            //   "success":true}
     Utils.returnJson(models);
 }
}

2、jsp代码

<div class="bg_row_out">
 <div class="bg_row_out_1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font color="red">*</font>省：</div>
 <div class="bg_row_out_2 required" style="border-right: 0 none;border-bottom: 0px solid #cccccc;">
         <!--从服务器获取-->
  <select id="provice" name="company.provice" class="newsletter_input">
   <option value=""></option>
   <c:forEach items="${provinces}" var="provice">
    <option value="${provice.id }">${provice.name }</option>
   </c:forEach>
  </select>
 </div>
</div>
<div class="bg_row_out">
 <div class="bg_row_out_1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font color="red">*</font>市：</div>
 <div class="bg_row_out_2 required" style="border-right: 0 none;border-bottom: 0px solid #cccccc;">
   <select id="city" name="company.city" class="newsletter_input">
    <option value=""></option>
   </select>
 </div>
</div>
<div class="bg_row_out">
 <div class="bg_row_out_1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font color="red">*</font>区：</div>
 <div class="bg_row_out_2 required" style="border-right: 0 none;border-bottom: 0px solid #cccccc;">
   <select id="district" name="company.district" class="newsletter_input">
    <option value=""></option>
   </select>
 </div>
</div>

3、js代码

$(function(){
 var district = $("#district").flexselect();
 $("#provice").flexselect({callback:function(){
   $.ajax( {
    url : "queryCity.htm",
    data : {
     "date" : new Date().getTime(),
     "grade" : $("#provice").val()
    },
    dataType:"json",
    success : function(result) {
     if(result.code != 200){
      alert(result.data);
      return;
     }
     result = result.data;
     var resultStr = [];
     for ( var i = 0; i < result.length; i++) {
      resultStr.push({name:result[i].name, value:result[i].id});
     }
     city.flexselect[0].cache = resultStr;
    }
   })
  }
 });
 var city=$("#city").flexselect({callback:function(){
   $.ajax( {
    url : "queryCity.htm",
    data : {
     "date" : new Date().getTime(),
     "grade" : $("#city").val()
    },
    dataType:"json",
    success : function(result) {
     if(result.code != 200){
      alert(result.data);
      return;
     }
     result = result.data;
     var resultStr = [];
     for ( var i = 0; i < result.length; i++) {
      resultStr.push({name:result[i].name, value:result[i].id});
     }
     district.flexselect[0].cache = resultStr;
    }
   })
  }
 });
  
});