jquery zTree asynchronous loading simple example sharing_jquery

First provide the Ztree official website http://www.ztree.me.
Ztree is a tree of various functions of a JSP page implemented using jQuery. This article introduces an implementation method for asynchronously obtaining data into a drop-down tree.
Current version Ztree 3.5.01
simple.html

Copy code The code is as follows:

< ;script type="text/javascript" src="js/jquery.js">

js

Copy code The code is as follows:

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",//Default text
// type: "get",//Default post
dataFilter: filter //After asynchronous return, filter
}
,callback:{
/ / beforeAsync: zTreeBeforeAsync, // Get the corresponding information before the asynchronous loading event
asyncSuccess: zTreeOnAsyncSuccess, // The asynchronously loaded fun
asyncError: zTreeOnAsyncError, // Load the wrong fun
beforeClick:beforeClick //Capture Event callback function before clicking the node
}
};
//treeId is treeDemo
function filter(treeId, parentNode, childNodes) {
if (!childNodes) return null;
for (var i=0, l=childNodes.length; ichildNodes[i].name = childNodes[i].name.replace('','');
}
return childNodes;
}
function beforeClick(treeId,treeNode){
if(!treeNode.isParent){
alert("Please select the parent node");
return false;
}else{
return true;
}
}
function zTreeOnAsyncError(event, treeId, treeNode){
alert("Asynchronous loading failed!");
}
function zTreeOnAsyncSuccess(event, treeId, treeNode, msg){

}
/***********************When you click on the parent node, the servlet will be accessed asynchronously and the ID will be passed *************** ****************/
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, pId:11, name:"leafNode 112"},
{ id:113, pId:11, name:"leafNode 113"},
{ id:114, pId:11, name:"leafNode 114"},
{ id:12, pId:1, name:"parentNode 12"},
{ id:121, pId:12, name:"leafNode 121"},
{ id:122, pId:12, name:"leafNode 122"},
{ id:123, pId:12, name:"leafNode 123"},
{ id:13, pId:1, name:"parentNode 13", isParent:true},
{ id:2, pId:0, name:"parentNode 2" , isParent:true}
]; */
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});

Get zTree object: var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
ZtreeServlet

Copy code The code is as follows:

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, 0, "zb1", true);
ZtreeBean zb2 = new ZtreeBean(2, 1, "zb2", false);
ZtreeBean zb3 = new ZtreeBean(2, 0, "zbss", true);
List list = new ArrayList();
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, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
public void init() throws ServletException {
}
}