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
< ;script type="text/javascript" src="js/jquery.js">
js
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; i
}
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
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.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 {
}
}
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1422
52
1316
25
1267
29
1239
24
Exposing Ajax exceptions and a list of ways to resolve errors
Jan 30, 2024 am 08:33 AM
The secret of Ajax anomaly is revealed. How to deal with various errors requires specific code examples. In 2019, front-end development has become an important position that cannot be ignored in the Internet industry. As one of the most commonly used technologies in front-end development, Ajax can realize asynchronous page loading and data interaction, and its importance is self-evident. However, various errors and exceptions are often encountered when using Ajax technology. How to deal with these errors is a problem that every front-end developer must face. 1. Network errors When using Ajax to send requests, the most common error is
c# What is delegation and what problem does it solve?
Apr 04, 2024 pm 12:42 PM
Delegation is a type-safe reference type used to pass method pointers between objects to solve asynchronous programming and event handling problems: Asynchronous programming: Delegation allows methods to be executed in different threads or processes, improving application responsiveness. Event handling: Delegates simplify event handling, allowing events such as clicks or mouse movements to be created and handled.
Effectively deal with situations where jQuery .val() doesn't work
Feb 20, 2024 pm 09:36 PM
Title: Methods and code examples to solve the problem that jQuery.val() does not work. In front-end development, jQuery is often used to operate page elements. Among them, getting or setting the value of a form element is one of the common operations. Usually, we use jQuery's .val() method to operate on form element values. However, sometimes you encounter situations where jQuery.val() does not work, which may cause some problems. This article will introduce how to effectively deal with jQuery.val(
The key optimization mode to improve website speed, every front-end developer must master!
Feb 02, 2024 pm 05:36 PM
A must-have for front-end developers: master these optimization modes and make your website fly! With the rapid development of the Internet, websites have become one of the important channels for corporate promotion and communication. A well-performing, fast-loading website not only improves user experience, but also attracts more visitors. As a front-end developer, it is essential to master some optimization patterns. This article will introduce some commonly used front-end optimization techniques to help developers better optimize their websites. Compressed files In website development, commonly used file types include HTML, CSS and J
How to read html
Apr 05, 2024 am 08:36 AM
Although HTML itself cannot read files, file reading can be achieved through the following methods: using JavaScript (XMLHttpRequest, fetch()); using server-side languages (PHP, Node.js); using third-party libraries (jQuery.get() , axios, fs-extra).
How to optimize the performance of H5 page production
Apr 06, 2025 am 06:24 AM
Through network requests, resource loading, JavaScript execution and rendering optimization, the performance of H5 pages can be improved and a smooth and efficient page can be created: resource optimization: compressed images (such as using tinypng), simplified code, and enabled browser caching. Network request optimization: merge files, use CDN, and load asynchronously. JavaScript optimization: reduce DOM operations, use requestAnimationFrame, and make good use of virtual DOM. Advanced skills: code segmentation, server-side rendering.
Demystifying Website Performance Optimization: Master these methods to make your website speed soar!
Feb 03, 2024 am 08:00 AM
Website performance optimization revealed: Master these methods to make your website fly! With the rapid development of the Internet, websites have become an important channel for corporate promotion, product display, and communication and interaction. However, when users visit the website, if the loading speed is too slow and the response time is too long, the user experience will be greatly reduced, and may even directly cause users to leave. Therefore, website performance optimization is becoming increasingly important. So, what is website performance optimization? Simply put, website performance optimization is to improve the loading speed of the website through a series of methods and technical means.
Sharing of PHP search function optimization tips
Mar 06, 2024 am 11:12 AM
PHP search function has always been a very important part of website development, because users often use the search box to find the information they need. However, many websites have problems such as low efficiency and inaccurate search results when implementing search functions. In order to help you optimize PHP search function, this article will share some tips and provide specific code examples. 1. Use full-text search engines. Traditional SQL databases are less efficient when processing large amounts of text content. Therefore, it is recommended to use full-text search engines, such as Elasticsearch, Solr, etc.
