jqueryztree实现下拉树形框使用到了json数据_jquery

index.jsp
代码如下:
<%@ 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"%>


" type="text/css">
" type="text/css">
">
">

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; iv += 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);
});
//-->

json数据类
代码如下:
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
代码如下:
public ModelAndView List(HttpServletRequest request, HttpServletResponse response,Product prod) throws Exception {
Map map=new HashMap();
List 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);
}