chosen实现省市区三级联动

<link href="../../css/plugins/chosen/chosen.css" rel="stylesheet">

<script src="../../js/plugins/chosen/chosen.jquery.js"></script>

<div class="row">
  <div class="form-group col-sm-2">
  <div class="input-group">
   <select data-placeholder="选择省份..." id="province" class="province-chosen-select" tabindex="1">
   <option value="">请选择省份</option>
   <#if provinceList?? && provinceList?size gt 0>
   <#list provinceList as province>
   <option value="${province.provinceId!}" >${province.name!}</option>
  </#list>
  </#if>
  </select>
  </div>
  </div>
  <div class="form-group col-sm-2" style="margin-left: 36px;">
  <div class="input-group">
  <select data-placeholder="选择城市..." id="city" class="city-chosen-select" tabindex="2">
  <option value="">请选择城市</option>
   </select>
  </div>
 </div>
 <div class="form-group col-sm-2" style="margin-left: 36px;">
  <div class="input-group">
   <select data-placeholder="选择区县..." class="area-chosen-select" id="area" tabindex="3">
   <option value="">请选择区县</option>
  </select>
  </div>
 </div>
</div>

<script type="text/javascript">
 $(function(){
  $('.province-chosen-select').chosen({
   disable_search_threshold: 10,
   no_results_text: '没有找到',//没有搜索到匹配项时显示的文字
   width: '240px',
   disable_search:false, // 设置为 true 隐藏单选框的搜索框
   disable_search_threshold:0 //少于 n 项时隐藏搜索框
  });
  $('.city-chosen-select').chosen({
   disable_search_threshold: 10,
   no_results_text: '没有找到',//没有搜索到匹配项时显示的文字
   width: '240px',
   disable_search:false, // 设置为 true 隐藏单选框的搜索框
   disable_search_threshold:0 //少于 n 项时隐藏搜索框
  });
  $('.area-chosen-select').chosen({
   disable_search_threshold: 10,
   no_results_text: '没有找到',//没有搜索到匹配项时显示的文字
   width: '240px',
   disable_search:false, // 设置为 true 隐藏单选框的搜索框
   disable_search_threshold:0 //少于 n 项时隐藏搜索框
  });
  
 })
 //Chosen 触发标准的 change 事件，会传递 selected or deselected 参数， 方便用户获取改变的选项
 $('.province-chosen-select').on('change', function(e, params) {
  findCitiesByProvince(e, params);
  });
 $('.city-chosen-select').on('change', function(e, params) {
  findAreasByCity(e, params);
  });
 
 function findCitiesByProvince(e, params) {
  var provinceId = params.selected;
  $.post("/mon/find_cities_by_province", {
  "provinceId":provinceId
  }, function(data){
   $('#city option:first').nextAll().remove();
   $('#area option:first').nextAll().remove();
   var html = '';
   for (var i = 0; i < data.length; i++) {
   html+='<option value="'+data[i].cityId+'" hassubinfo="true">'+data[i].name+'</option>'
   }
   $("#city").append(html);
   //通过 JS 改变 select 元素选项时应该触发此事件，以更新 Chosen 生成的选框
   $('.city-chosen-select').trigger('chosen:updated');
   $('.area-chosen-select').trigger('chosen:updated');
  })
 }
 function findAreasByCity(e, params) {
  var cityId = params.selected;
  $.post("/mon/find_areas_by_city", {
  "cityId":cityId
  }, function(data){
   $('#area option:first').nextAll().remove();
   var html = '';
   for (var i = 0; i < data.length; i++) {
   html+='<option value="'+data[i].areaId+'" hassubinfo="true">'+data[i].name+'</option>'
   }
   $("#area").append(html);
   //通过 JS 改变 select 元素选项时应该触发此事件，以更新 Chosen 生成的选框
   $('.area-chosen-select').trigger('chosen:updated');
  })
 }
 function submitBtn() {
  $("#result_div").html('');
  var provinceId = $("#province").val();
  var provinceName = $("#province option:selected").text();
  var cityId = $("#city").val();
  var cityName = $("#city option:selected").text();
  var areaId = $("#area").val();
  var areaName = $("#area option:selected").text();
  $("#result_div").append("provinceId="+provinceId+"<br>")
  .append("provinceName="+provinceName+"<br>")
  .append("cityId="+cityId+"<br>")
  .append("cityName="+cityName+"<br>")
  .append("areaId="+areaId+"<br>")
  .append("areaName="+areaName+"<br>");
 }
 </script>

 /
 
  @Title: findCitiesByProvince
  @Description: 根据省份获取城市列表
  @author: 大都督
  @param provinceId
  @return
  @return: MessageInfo
 /
 @RequestMapping("/find_cities_by_province")
 @ResponseBody
 public List<City> findCitiesByProvince(String provinceId) {
  Assert.hasText(provinceId, StringText.provinceId_must);
  return cityDao.findByProvinceId(provinceId);
 }
 /
 
  @Title: findAreasByCity
  @Description: 根据城市获取区县列表
  @author: 大都督
  @param cityId
  @return
  @return: List<City>
 /
 @RequestMapping("/find_areas_by_city")
 @ResponseBody
 public List<Area> findAreasByCity(String cityId) {
  Assert.hasText(cityId, StringText.cityId_must);
  return areaDao.findByCity(cityId);
 }