How to implement click-loading of five-level regions across the country in the zTree tree plug-in

Below I will share with you an example of using the zTree tree plug-in to implement click-loading in five-level regions across the country. It has a good reference value and I hope it will be helpful to everyone.

In the project function, the place of residence and current residence need to be entered. In order to reduce the amount of user input, the tree plug-in will be used to select the five-level regions across the country and enter the detailed address in the input box. The zTree tree plug-in is used first here. For future use and study, relevant records are made here. Of course, it is essential to refer to the articles of major gods during the implementation process, and you can quickly solve problems based on your own actual needs.

zTree tree plug-in official website introduction

zTree is a multi-functional "tree plug-in" implemented by jQuery. Excellent performance, flexible configuration, and combination of multiple functions are the biggest advantages of zTree.

zTree tree plug-in official website address

http://www.treejs.cn/v3/main.php#_zTreeInfo

Function implementation code

Basic structure of database region table:

regionType 地区级别
path 地区编码
name 地区名称
parentRegion 上级地区

Page code:

<!-- 户籍地、现居住地 -->
<tr>
 <td colspan="3">
  <p class="form-group">
   <label style="display: block;">户籍地</label>
   <input type="hidden" name="domiciliary" id="domiciliary">
   <input type="text" class="form-control" style="width:300px;float:left;" id="domiciliary-text" value="" onclick="showRegion(&#39;domiciliary&#39;)" placeholder="点击选择地区" maxlength="20" readonly="readonly">
   <input type="text" class="form-control" style="width:320px;float:left;" name="domiciliaryAddress" value="" placeholder="详细地址" maxlength="100">
  </p>
 </td>
</tr>
<tr>
 <td colspan="3">
  <p class="form-group">
   <label style="display: block;">现居住地址</label>
   <input type="hidden" name="bide" id="bide">
   <input type="text" class="form-control" style="width:300px;float:left;" id="bide-text" value="" onclick="showRegion(&#39;bide&#39;)" placeholder="点击选择地区" maxlength="20" readonly="readonly">
   <input type="text" class="form-control" style="width:320px;float:left;" name="bideAddress" value="" placeholder="详细地址" maxlength="100">
  </p>
 </td>
</tr>
<!-- bootstrap 模态框（Modal） -->
<p class="modal fade" id="regionModal" tabindex="-1" role="dialog" aria-hidden="true">
 <input type="hidden" id="regionModalType" />
 <p class="modal-dialog">
  <p class="modal-content">
   <p class="modal-body">
    <!-- zTree 的容器 -->
    <ul id="treeRegion" class="ztree"></ul>
   </p>
   <p class="modal-footer">
    <button type="button" class="btn btn-default" data-dismiss="modal">取消</button>
    <button type="button" class="btn btn-primary" onclick="confimRegion()">确认</button>
   </p>
  </p>
 </p>
</p>

Effect :

##js code:

$(document).ready(function() {
 // zTree 参数配置
 var setting = {
  view: {
   showIcon: false,//是否显示节点的图标
   selectedMulti: false //设置是否允许同时选中多个节点。默认值: true。
  },
  data: {
   simpleData: {
    enable: true, //是否采用简单数据模式 (Array)。默认值：false
    idKey: "path", //节点数据中保存唯一标识的属性名称。
    pIdKey: "parentRegion", //节点数据中保存其父节点唯一标识的属性名称。
    rootPid: "10000000000000" //用于修正根节点父节点数据，即 pIdKey 指定的属性值。
   }
  },
  callback: {
   // 用于捕获节点被点击的事件回调函数
   onClick: function(event, treeId, treeNode, clickFlag) {
    var treeObj = $.fn.zTree.getZTreeObj(treeId); //根据 treeId 获取 zTree 对象
    // 这里判断节点被点击时，如果有已经加载下级节点，则不用请求服务器
    if((treeNode.children == null || treeNode.children == "undefined")){
     if(!$("#"+treeNode.tId+"_switch").hasClass("center_docu") && !$("#"+treeNode.tId+"_switch").hasClass("bottom_docu")){
      // 请求服务器，获得点击地区的下级地区
      $.ajax({
       type: "get",
       async: false,
       url: "tRegion/ajaxArea",
       data:{
        path:treeNode.path
       },
       dataType:"json",
       success: function(data){
        if(data != null && data.length != 0){
         //添加新节点
         var newNodes = treeObj.addNodes(treeNode, data);
         $(newNodes).each(function(i,n){
          var id = n.tId+"_switch";
          if($("#"+id).hasClass("center_docu")){
           $("#"+id).removeClass("center_docu");
           $("#"+id).addClass("center_close");
          }
          if($("#"+id).hasClass("bottom_docu")){
           $("#"+id).removeClass("bottom_docu");
           $("#"+id).addClass("bottom_close");
          }
         });
        }else{
         var id = treeNode.tId+"_switch";
         if($("#"+id).hasClass("center_close")){
          $("#"+id).removeClass("center_close");
          $("#"+id).addClass("center_docu");
         }
         if($("#"+id).hasClass("bottom_close")){
           $("#"+id).removeClass("bottom_close");
           $("#"+id).addClass("bottom_docu");
          }
        }
       },
       error:function(event, XMLHttpRequest, ajaxOptions, thrownError){
        result = true;
        toastr.error("请求失败!");
       }
      });
     }
    }else{
     // 展开当前节点
     treeObj.expandNode(treeNode);
    }
   }
   }
  };
 // 显示区域树，加载顶级节点
 $.ajax({
  type: "get",
  url: "tRegion/ajaxArea",
  data: {path:"10000000000000"},
  success: function(data, status) {
   if (status == "success") {
    // 初始化区域树
    $.fn.zTree.init($("#treeRegion"), setting, data);
    // 获得zTree对象
    var treeObj = $.fn.zTree.getZTreeObj("treeRegion");
    // 获得初始化的所有节点，即顶级节点
    var nodes = treeObj.getNodes();
    $(nodes).each(function(i,n){
     var id = n.tId+"_switch";
     if($("#"+id).hasClass("roots_docu")){
      $("#"+id).removeClass("roots_docu");
      $("#"+id).addClass("roots_close");
     }
     if($("#"+id).hasClass("center_docu")){
      $("#"+id).removeClass("center_docu");
      $("#"+id).addClass("center_close");
     }
     if($("#"+id).hasClass("bottom_docu")){
      $("#"+id).removeClass("bottom_docu");
      $("#"+id).addClass("bottom_close");
     }
    });
   }
  },
  error : function() {
   toastr.error('Error');
  },
 });
});
function showRegion(type){
 // 显示模态框
 $('#regionModal').modal('show');
 $("#regionModalType").val(type);
}
// 选择地区确认
function confimRegion(){
 var type = $("#regionModalType").val();
 var treeObj = $.fn.zTree.getZTreeObj("treeRegion");
 var node = treeObj.getSelectedNodes(); //选中节点
 var regionType = node[0].regionType;
 if(Number(regionType) >= 5){
  $("#"+type+"-text").val(node[0].name);
  $("#"+type).val(node[0].path);
  $('#regionModal').modal('hide');
 }
}

Implementation effect:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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