Ztree是一个使用jQuery实现的JSP页面的各种功能树，本文介绍一个异步获取数据到下拉树的实现方式。
当前版本Ztree 3.5.01
simple.html
复制代码 代码如下:
<!DOCTYPE html>
<html>
<head>
<title>simple.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="css/zTreeStyle.css">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/jquery.ztree.core-3.5.js"></script>
<script type="text/javascript" src="js/jquery.ztree.excheck-3.5.min.js"></script>
<!-- <script type="text/javascript" src="js/standard.js"></script> -->
<script type="text/javascript" src="js/1.js"></script>
</head>
<body>
<div class="zTreeDemoBackground left"><ul id="treeDemo" class="ztree"></ul></div>
</body>
</html>
js
复制代码 代码如下:
var setting = {
data: {
simpleData: {
enable: true
// idKey:"id",
// pIdKey:"pId",
}
}
,async: {
enable: true,
url:"/Java_Solr/servlet/ZTreeSerlvet",
autoParam:["id","name"],
otherParam:{"otherParam":"zTreeAsyncTest"},
// dataType: "text",//默认text
// type:"get",//默认post
dataFilter: filter //异步返回后经过Filter
}
,callback:{
// beforeAsync: zTreeBeforeAsync,// 异步加载事件之前得到相应信息
asyncSuccess: zTreeOnAsyncSuccess,//异步加载成功的fun
asyncError: zTreeOnAsyncError,//加载错误的fun
beforeClick:beforeClick //捕获单击节点之前的事件回调函数
}
};
//treeId是treeDemo
function filter(treeId,parentNode,childNodes) {
if (!childNodes) return null;
for (var i=0,l=childNodes.length; i<l; i++) {
childNodes[i].name = childNodes[i].name.replace('','');
}
return childNodes;
}
function beforeClick(treeId,treeNode){
if(!treeNode.isParent){
alert("请选择父节点");
return false;
}else{
return true;
}
}
function zTreeOnAsyncError(event,treeId,treeNode){
alert("异步加载失败!");
}
function zTreeOnAsyncSuccess(event,treeNode,msg){
}
/***********************当你点击父节点是,会异步访问servlet,把id传过去*****************************/
var zNodes=[];
/* var zNodes =[
{ id:1,pId:0,name:"parentNode 1",open:true},
{ id:11,pId:1,name:"parentNode 11"},
{ id:111,pId:11,name:"leafNode 111"},
{ id:112,name:"leafNode 112"},
{ id:113,name:"leafNode 113"},
{ id:114,name:"leafNode 114"},
{ id:12,name:"parentNode 12"},
{ id:121,pId:12,name:"leafNode 121"},
{ id:122,name:"leafNode 122"},
{ id:123,name:"leafNode 123"},
{ id:13,name:"parentNode 13",isParent:true},
{ id:2,name:"parentNode 2",isParent:true}
]; */
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"),setting,zNodes);
});
得到zTree对象 :var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
ZtreeServlet
复制代码 代码如下:
package org.hzy.servlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hzy.bean.ZtreeBean;
import com.alibaba.fastjson.JSON;
public class ZTreeSerlvet extends HttpServlet {
public void destroy() {
super.destroy();
}
public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
System.out.println(request.getParameter("id") + " " + request.getParameter("name") + " " + request.getParameter("otherParam"));
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
ZtreeBean zb = new ZtreeBean(0,-1,"zb",true);
ZtreeBean zb1 = new ZtreeBean(1,"zb1",true);
ZtreeBean zb2 = new ZtreeBean(2,1,"zb2",false);
ZtreeBean zb3 = new ZtreeBean(2,"zbss",true);
List<ZtreeBean> list = new ArrayList<ZtreeBean>();
list.add(zb);
list.add(zb1);
list.add(zb2);
list.add(zb3);
String str = JSON.toJSONString(list);
out.print(str);
}
public void doPost(HttpServletRequest request,IOException {
doGet(request,response);
}
public void init() throws ServletException {
}
}
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