如下所示：

<select id="cc" class="easyui-combotree" style="width:580px;" name="rempId" data-options="required:true"></select>

<script>$(function(){$.ajax({url:"departmentAction_getAllDep.action",type:"post",success:function(result){//console.log(result);$("#cc").combotree('loadData',b1(result));}});$("#cc").combotree({animate:true,//選擇樹節(jié)點(diǎn)觸發(fā)事件  onSelect : function(node) {  n = node;  //返回樹對象   var tree = $(this).tree;   //選中的節(jié)點(diǎn)是否為葉子節(jié)點(diǎn),如果不是葉子節(jié)點(diǎn),清除選中   var isLeaf = tree('isLeaf', node.target);   if (!isLeaf) {    //清除選中    $("#cc").combotree('clear');   }  } });});var tree = {id:'',  text:'',  state:'',  checked:'',  iconCls:'', attributes:'',  children:''}function b1(result){var t = [];$.each(result,function(index,dept){t[index] = b2(dept);});return t;}function b2(dept){  var tree = new Object();tree.id = dept.depId;  tree.text = dept.depName;  tree.state = 'closed';  tree.checked = 'false'; if(dept.employees.length != 0){ tree.children = b3(dept.employees); }else{ tree.children = []; } return tree;}function b3(employees){  var easyTree = [];  $.each(employees,function(index,item){  easyTree[index] = b4(item);  });  return easyTree; }  function b4(item){var tree = new Object();tree.id = item.empId;tree.text = item.empName;if(item.empSex == "男"){tree.iconCls = 'icon-nan';}else{tree.iconCls = 'icon-female';}return tree;} </script>

department表中的dept_id作為employee表中有的外鍵，生成的Department.java類中有Set<employee>對象。從后臺查詢部門表，得到List<Department>集合，通過struts2配置：

<action name="departmentAction_*" class="com.chinasoft.action.DepartmentAction" method="{1}"><result name="getAllDep" type="json"><param name="root">list</param></result></action>

轉(zhuǎn)成json格式后，傳到j(luò)sp頁面，在前臺頁面中處理json數(shù)據(jù)，動(dòng)態(tài)生成下拉樹。

以上這篇ajax請求后臺得到j(luò)son數(shù)據(jù)后動(dòng)態(tài)生成樹形下拉框的方法就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持錯(cuò)新站長站。