jquery ztree实现下拉树形框，json数据

来源：互联网发布：淘宝正品篮球鞋店铺编辑：程序博客网时间：2024/04/29 03:12

公司最近的项目需要用到树形下拉框，在网上找了挺多源码，最后还是采用了zTree来实现，因为代码的移植性比较高，而且数据的获取比较容易。废话不多说，直接上代码。

index.jsp

<%@ page language="java" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%><html> <head><link rel="stylesheet" href="<c:url value='/js/ztree/css/demo.css'/>" type="text/css"></link><link rel="stylesheet" href="<c:url value='/js/ztree/css/zTreeStyle/zTreeStyle.css'/>" type="text/css"></link><script type="text/javascript" src="<c:url value='/js/ztree/js/jquery-1.4.4.min.js'/>"></script><script type="text/javascript" src="<c:url value='/js/ztree/js/jquery.ztree.core-3.5.js'/>"></script><SCRIPT type="text/javascript"><!--var setting = {view: {dblClickExpand: false},data: {simpleData: {enable: true}},callback: {beforeClick: beforeClick,onClick: onClick}};//json数据源，也可以从后台读取json字符串，并转换成json对象，如下所示//var strNodes = '${jsonList}';//var zNodes = eval("("+strNodes+")"); //将json字符串转换成json对象数组，strNode一定要加"（）"，不然转不成功var zNodes =[{id:1, pId:0, name:"北京"},{id:2, pId:0, name:"天津"},{id:3, pId:0, name:"上海"},{id:6, pId:0, name:"重庆"},{id:4, pId:0, name:"河北省", open:true},{id:41, pId:4, name:"石家庄"},{id:42, pId:4, name:"保定"},{id:43, pId:4, name:"邯郸"},{id:44, pId:4, name:"承德"},{id:5, pId:0, name:"广东省", open:true},{id:51, pId:5, name:"广州"},{id:52, pId:5, name:"深圳"},{id:53, pId:5, name:"东莞"},{id:54, pId:5, name:"佛山"},{id:6, pId:0, name:"福建省", open:true},{id:61, pId:6, name:"福州"},{id:62, pId:6, name:"厦门"},{id:63, pId:6, name:"泉州"},{id:64, pId:6, name:"三明"} ];function beforeClick(treeId, treeNode) {var check = (treeNode && !treeNode.isParent);if (!check) alert("只能选择城市...");return check;}function onClick(e, treeId, treeNode) {var zTree = $.fn.zTree.getZTreeObj("treeDemo"),nodes = zTree.getSelectedNodes(),v = "";nodes.sort(function compare(a,b){return a.id-b.id;});for (var i=0, l=nodes.length; i<l; i++) {v += nodes[i].name + ",";}if (v.length > 0 ) v = v.substring(0, v.length-1);var cityObj = $("#citySel");cityObj.attr("value", v);}function showMenu() {var cityObj = $("#citySel");var cityOffset = $("#citySel").offset();$("#menuContent").css({left:cityOffset.left + "px", top:cityOffset.top + cityObj.outerHeight() + "px"}).slideDown("fast");$("body").bind("mousedown", onBodyDown);}function hideMenu() {$("#menuContent").fadeOut("fast");$("body").unbind("mousedown", onBodyDown);}function onBodyDown(event) {if (!(event.target.id == "menuBtn" || event.target.id == "menuContent" || $(event.target).parents("#menuContent").length>0)) {hideMenu();}}$(document).ready(function(){$.fn.zTree.init($("#treeDemo"), setting, zNodes);});//--></SCRIPT> </head> <body><div class="zTreeDemoBackground left"><ul class="list"><li class="title">  <span class="highlight_red">选择城市时，按下 Ctrl 或 Cmd 键可以进行多选</span></li><li class="title">  城市：<input id="citySel" type="text" readonly value="" style="width:120px;"/> <a id="menuBtn" href="#" onclick="showMenu(); return false;">选择</a></li></ul></div>    <div id="menuContent" class="menuContent" style="display:none; position: absolute;">       <ul id="treeDemo" class="ztree" style="margin-top:0; width:160px;"></ul>    </div> </body></html>

spring后台

json数据类

public class EquipTypeJson {private String id;private String pId;private String name;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getPId() {return pId;}public void setPId(String pId) {this.pId = pId;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

controller页面

public ModelAndView List(HttpServletRequest request, HttpServletResponse response,Product prod) throws Exception {Map map=new HashMap();List<EquipTypeJson> list = testService.getAllEquipType();//数据库中获取源数据JSONArray jsonArray = JSONArray.fromObject(list);//将list数据转为json对象String json = jsonArray.toString();//将json对象转为字符串map.put("jsonList", json);return new ModelAndView("equip/List").addAllObjects(map);}

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