How to dynamically load data using treeview in the Bootstrap framework

<link rel="stylesheet" href="项目静态资源路径/bootstrap-treeview/css/bootstrap.css" rel="external nofollow" >
 <script type="text/javascript" src="项目静态资源路径/js/jquery/3.1.0/jquery-3.1.0.min.js"></script>
 <script type="text/javascript" src="项目静态资源路径/bootstrap/bootstrap.js"></script>
 <script type="text/javascript" src="项目静态资源路径/bootstrap-treeview/js/jquery.js"></script>
 <script type="text/javascript" src="项目静态资源路径/bootstrap-treeview/js/bootstrap-treeview.js"> </script>

<!-- 省市区地域查询展示 -->
 <p class="container">
  <p class="row">
  <p class="col-sm-4">
   <h4>快捷搜索</h4>
   <!-- <form> -->
   <p class="form-group">
    <label for="input-search" class="sr-only">快捷搜索:</label>
    <input type="input" class="form-control" id="input-search" placeholder="请输入要查询的省市区名称信息..." value="">
   </p>
   **_ <!-- 该部分为复选框，用于丰富搜索体验，本文忽略
<p class="checkbox">
    <label>
    <input type="checkbox" class="checkbox" id="chk-ignore-case" value="false"/>
     忽略大小写
    </label>
   </p>
   <p class="checkbox">
    <label>
    <input type="checkbox" class="checkbox" id="chk-exact-match" value="false">
     准确匹配
    </label>
   </p>
   <p class="checkbox">
    <label>
    <input type="checkbox" class="checkbox" id="chk-reveal-results" value="false">
     显示结果
    </label>
   </p> -->_**
   <button type="button" class="btn btn-success" id="btn-search">搜索</button>
   <button type="button" class="btn btn-default" id="btn-clear-search">清除</button>
   <!-- </form> -->
  </p>
  <p class="col-sm-4">
   <h4>省市区名称层级树</h4>
   <p id="treeview-searchable" class=""></p>
  </p>
  <p class="col-sm-4">
   <h4>查询结果展示</h4>
   <p id="search-output"></p>
  </p>
  </p>
  </p>

$(function () {
  var defaultData;
   $.ajax({
    type: "post",
    url: "项目请求路径方法.json",
    dataType: "json",
    success: function (result) { 
    defaultData=result;
     var initSearchableTree = function() {
     return $('#treeview-searchable').treeview({
      data: defaultData,
      nodeIcon: 'glyphicon glyphicon-globe',
      emptyIcon: '', //没有子节点的节点图标
      //collapsed: true,
     });
     };
     var $searchableTree = initSearchableTree();
     $('#treeview-searchable').treeview('collapseAll', { 
     silent : false//设置初始化节点关闭
    });
     var findSearchableNodes = function() {
     return $searchableTree.treeview('search', [ $.trim($('#input-search').val()), { ignoreCase: false, exactMatch: false } ]);
     };
     var searchableNodes = findSearchableNodes();
     // Select/unselect/toggle nodes
     $('#input-search').on('keyup', function (e) {
     var str = $('#input-search').val(); 
     if($.trim(str).length>0){
      searchableNodes = findSearchableNodes();
     } else {
     $('#treeview-searchable').treeview('collapseAll', { 
      silent : false //设置初始化节点关闭
     });
     }
     //$('.select-node').prop('disabled', !(searchableNodes.length >= 1));
     });
    var search = function(e) {
      var pattern = $.trim($('#input-search').val());
      var options = {
      ignoreCase: $('#chk-ignore-case').is(':checked'),
      exactMatch: $('#chk-exact-match').is(':checked'),
      revealResults: $('#chk-reveal-results').is(':checked')
      };
      var results = $searchableTree.treeview('search', [ pattern, options ]);
      var output = &#39;<p>&#39; + results.length + &#39; 匹配的搜索结果</p>&#39;;
      $.each(results, function (index, result) {
      output += &#39;<p>- <span style="color:red;">&#39; + result.text + &#39;</span></p>&#39;;
      });
      $(&#39;#search-output&#39;).html(output);
     }
     $(&#39;#btn-search&#39;).on(&#39;click&#39;, search);
     $(&#39;#input-search&#39;).on(&#39;keyup&#39;, search);
     $(&#39;#btn-clear-search&#39;).on(&#39;click&#39;, function (e) {
      $searchableTree.treeview(&#39;clearSearch&#39;);
      $(&#39;#input-search&#39;).val(&#39;&#39;);
      $(&#39;#search-output&#39;).html(&#39;&#39;);
      $(&#39;#treeview-searchable&#39;).treeview(&#39;collapseAll&#39;, {
      silent : false//设置初始化节点关闭
     });
     });
    
    },
    error: function () {
     alert("省市区地域信息加载失败！")
    }
   });
  });

@ResponseBody
@RequestMapping(value = "/queryAreaInfo", method = { RequestMethod.POST }, produces = MediaType.APPLICATION_JSON_VALUE)
 public List<Object> queryAreaInfo() {
 List<AreaVO> areaInfo=new ArrayList<>();
 try {
 //获取缓存中的省市区信息（本项目直接从缓存中获取，也可以单独写方法到Service、Dao层查询）
 EcncSysConfig sysConfig = new EcncSysConfig();
 areaInfo = sysConfig.INIT_SYS_ECNC_AREAVO;
 } catch (Throwable e) {
 e.printStackTrace();
 }
 //盛放省份
 List<Object> result=new ArrayList<>();
 for (AreaVO areaVO : areaInfo) {
 Map<String, Object> map= new HashMap<>();
 if("2".equals(areaVO.getGrade())){
 map.put("text", areaVO.getName());
 //盛放地市
 List<Object> cList=new ArrayList<>();
 for (AreaVO cVO : areaInfo) {
  Map<String, Object> cMap=new HashMap<>();
  if (cVO.getParentId() != null && cVO.getParentId().equals(areaVO.getId())) {
  cMap.put("text", cVO.getName());
  //盛放区县
  List<Object> rList=new ArrayList<>();
  for (AreaVO rVO : areaInfo) {
  Map<String, Object> rMap=new HashMap<>();
  if (cVO.getId().equals(rVO.getParentId())) {
  rMap.put("text", rVO.getName());
  rList.add(rMap);
  }
  }
  cMap.put("nodes", rList);
  cList.add(cMap);
  }
 }
 map.put("nodes", cList);
 result.add(map);
 }
 }
 return result;
 }