<ul id="deptTree" class="ztree"></ul>

$.fn.zTree.init($("#deptTree"), setting, data);

init(obj, zSetting, zNodes);

var setting = {
 data: {
  simpleData: {
   enable: true,
   idKey: "deptId", //对应参数中的主键id
   pIdKey: "parentId", //对应参数中的父id
   rootPId: 0 //根节点的id
  },
  key: {
   url:"nourl"
  }
 }
};

[{
 "deptId": 1,
 "parentId": 0,
 "name": "XX科技",
 "parentName": null,
 "orderNum": 0,
 "delFlag": 0,
 "open": null,
 "list": null
}, {
 "deptId": 2,
 "parentId": 1,
 "name": "长沙分公司",
 "parentName": "XX科技",
 "orderNum": 1,
 "delFlag": 0,
 "open": null,
 "list": null
}, {
 "deptId": 3,
 "parentId": 1,
 "name": "上海分公司",
 "parentName": "XX科技",
 "orderNum": 2,
 "delFlag": 0,
 "open": null,
 "list": null
}, {
 "deptId": 4,
 "parentId": 3,
 "name": "技术部",
 "parentName": "上海分公司",
 "orderNum": 0,
 "delFlag": 0,
 "open": null,
 "list": null
}, {
 "deptId": 5,
 "parentId": 3,
 "name": "销售部",
 "parentName": "上海分公司",
 "orderNum": 1,
 "delFlag": 0,
 "open": null,
 "list": null
}]

$.ajax({
 type: "get",
 url: baseURL+"sys/dept/list",
 success:function(data){
 ztree = $.fn.zTree.init($("#deptTree"), setting, data);
 var node = ztree.getNodeByParam("deptId", );
});