Uploadify is an upload plug-in for JQuery. It achieves very good results and displays progress. However, the officially provided example is the PHP version. This article will introduce the use of Uploadify in Aspnet in detail. You can also click the link below for demonstration or download.
Let me show you the renderings first:
Modification:
It reported that the uploadify-cancel.png file could not be found. Find uploadify.css, find .uploadify-queue-item .cancel a {, and modify the file path.
Many people say that when using uploadify on chrome and Firefox, the session cannot be obtained, resulting in upload errors. You need to manually add the session id method to the parameters. But I didn’t do that here, and there was no problem uploading it in Chrome and Firefox. I don’t know why, maybe it’s because I’m using the latest version.
Key points:
The js configuration of uploadify is relatively comprehensive, and some methods and attributes can be appropriately deleted during actual use.
Under normal circumstances, only onSelect, onUploadError and onUploadSuccess can be considered for single file upload.
If it is a multi-file upload, then in addition to the single file upload, add onQueueComplete to monitor the entire queue.
Start uploading all files: $('#file_upload').uploadify('upload', '*');
Cancel upload: $('#file_upload').uploadify('cancel', parm);
parm is empty: Cancel uploading the first file.
parm is '*': cancel all uploaded files.
parm is file id: Cancel the file corresponding to the file id.
Modify some additional variables: $('#file_upload').uploadify("settings","formData",{"name1":"Chinese name","parm1":"Modified parameters"}); The parameter is json. If a variable in the json already exists, then overwrite the attribute. If not, then append the attribute.
The server-side setting encoding is: upload.setHeaderEncoding("UTF-8");, so that the parsed file name is normal Chinese. However, the parsed additional variables are garbled in Chinese, so we do a transcoding here (I always feel that the transcoding is relatively low, and I don’t know where the configuration is wrong). new String(item.getString().getBytes("iso8859-1"),"utf-8")
The server finally returns the file saving path (you can define the return content here as you like).
Steps:
Configure uploadify
<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
<%String path = request.getContextPath();%>
<%String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<base href="<%=basePath %>">
<title></title>
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.3/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.3/themes/icon.css">
<script type="text/javascript" src="jquery-easyui-1.4.3/jquery.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.4.3/jquery.easyui.min.js"></script>
<script type="text/javascript" src="uploadify/uploadify/jquery.uploadify.min.js"></script>
<link rel="stylesheet" type="text/css" href="uploadify/uploadify/uploadify.css" />
</head>
<script>
$(function(){
$(function() {
$(function() {
$('#file_upload').uploadify({
'uploader' : '<%=basePath%>/UploadServlet',//服务端地址
'swf' : 'uploadify/uploadify/uploadify.swf',
'buttonImage' : 'uploadify/uploadify/img/chooseFile.jpg',//重载按钮图片
'buttonClass' : 'some-class',//重载按钮样式
'height':19,//按钮宽度和高度
'width':76,
'queueID' : 'file_queue',//显示文件队列的一个div，在页面定义
'formData' : {'parm1':'参数1','year':'2016'},//附加参数，可以在upload参数中更改
'buttonText':'选择文件',//按钮显示文字，如果有图片的话，会被图片挡住
'fileSizeLimit':'1MB',//文件最大
'auto':false,//自动提交
'fileTypeExts' : '*.gif; *.jpg; *.png',//文件类型
'fileTypeDesc' : '只能上传图片',//选择文件的时候的提示信息
'multi' : true,//多选
'queueSizeLimit' : 3,//队列中文件的个数
'onSelect' : function(file) {
console.log(file);
alert("选择文件：" + file.name + "\n类型="+file.type+"\n大小="+file.size);
if(file.size>1024000){//文件太大，取消上传该文件
alert("文件大小超过限制！");
$('#file_upload').uploadify('cancel',file.id);
}
},
'onUploadSuccess' : function(file, data, response) {
alert('每个文件上传成功后触发 ' + file.name + ' was successfully uploaded with a response of ' + response + ':' + data);
},
'onUploadComplete' : function(file) {
alert('每个文件上传完成，无论对错都触发！ ' + file.name + ' finished processing.');
},
'onUploadError' : function(file, errorCode, errorMsg, errorString) {
alert('上传出错 ' + file.name + ' could not be uploaded: ' + errorString);
},
'onQueueComplete':function(queueData){
alert("队列中的所有文件上传完成后触发。
"+queueData.uploadsSuccessful+'\n'+queueData.uploadsErrored)
},
});
});
});
});
function upload(){
$('#file_upload').uploadify("settings","formData",{"name1":"中文name","parm1":"修改后的参数"});
$('#file_upload').uploadify('upload', '*');//上传所有文件
}
function cancel(){
$('#file_upload').uploadify('cancel', '*');//取消所有文件
}
function destroy(){
alert("取消upload上传，变成原来样式！");
$('#file_upload').uploadify('destroy');//destory
}
</script>
<body>
<div class="easyui-panel" title="说明" style="margin-bottom:15px">
</div>
<div class="easyui-panel" style="text-align:center;margin-bottom:15px">
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="upload()">开始上传</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="cancel()">取消上传</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="destroy()">destroy</a>
<input type="file" name="file_upload" id="file_upload" />
<div id="file_queue" style="width:400px;height:10px;position:absolute;z-index:999"></div>
</div>
</body>
</html>
Server
package com.servlet;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* Servlet implementation class UploadServlet
*/
@WebServlet(name="UploadServlet",urlPatterns="/UploadServlet")
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = -6483558339095298703L;
/**
* @see HttpServlet#HttpServlet()
*/
public UploadServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("获取session，可以根据这个session进行一些其他的判断" + request.getSession().getId());
SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");
String remotePath = File.separator + "download" + File.separator + sdf.format(new Date()) + File.separator;
String savePath = remotePath;
File dfile = new File(savePath);
if (!dfile.exists()) {
dfile.mkdirs();
}
DiskFileItemFactory fac = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(fac);
upload.setHeaderEncoding("UTF-8");
List<FileItem> fileList = null;
try {
fileList = upload.parseRequest(request);
} catch (FileUploadException ex) {
return;
}
Iterator<FileItem> it = fileList.iterator();
String name = "";
String extName = "";
while (it.hasNext()) {
FileItem item = it.next();
if (!item.isFormField()) {
name = item.getName();
long size = item.getSize();
String type = item.getContentType();
System.out.println("文件=" + name + " " + size + " " + type);
if (name == null || name.trim().equals("")) {
continue;
}
// 扩展名格式：
if (name.lastIndexOf(".") >= 0) {
extName = name.substring(name.lastIndexOf("."));
}
File file = null;
do {
// 生成文件名：
name = UUID.randomUUID().toString();
file = new File(savePath + name + extName);
} while (file.exists());
File saveFile = new File(savePath + name + extName);
try {
item.write(saveFile);
} catch (Exception e) {
e.printStackTrace();
}
}else if(item.isFormField()){
System.out.println("表单内容：" + item.getFieldName() + "=" + new String(item.getString().getBytes("iso8859-1"),"utf-8"));
}
}
String requestPath = remotePath + name + extName;
request.getSession().setAttribute(requestPath, requestPath);
response.getWriter().write(savePath + name + extName);
}
}
From Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AMJavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.
Python vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AMPython is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.
The Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AMC and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.
JavaScript in Action: Real-World Examples and ProjectsApr 19, 2025 am 12:13 AMJavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.
JavaScript and the Web: Core Functionality and Use CasesApr 18, 2025 am 12:19 AMThe main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.
Understanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AMUnderstanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.
Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AMPython is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AMPython and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.
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
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
WebStorm Mac version
Useful JavaScript development tools
Atom editor mac version download
The most popular open source editor
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
