Detailed explanation of ajax fileupload asynchronous upload plug-in
This article mainly introduces the jquery ajaxfileupload asynchronous upload plug-in in detail. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.
The server uses struts2 to handle file uploads.
Required environment:
jquery.js
ajaxfileupload.js
jar package that struts2 depends on
and struts2-json-plugin-2.1.8.1.jar
Write the Action for file upload
package com.ajaxfile.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class FileAction extends ActionSupport {
private File file;
private String fileFileName;
private String fileFileContentType;
private String message = "你已成功上传文件";
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileFileName() {
return fileFileName;
}
public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}
public String getFileFileContentType() {
return fileFileContentType;
}
public void setFileFileContentType(String fileFileContentType) {
this.fileFileContentType = fileFileContentType;
}
@SuppressWarnings("deprecation")
@Override
public String execute() throws Exception {
String path = ServletActionContext.getRequest().getRealPath("/upload");
try {
File f = this.getFile();
if(this.getFileFileName().endsWith(".exe")){
message="对不起,你上传的文件格式不允许!!!";
return ERROR;
}
FileInputStream inputStream = new FileInputStream(f);
FileOutputStream outputStream = new FileOutputStream(path + "/"+ this.getFileFileName());
byte[] buf = new byte[1024];
int length = 0;
while ((length = inputStream.read(buf)) != -1) {
outputStream.write(buf, 0, length);
}
inputStream.close();
outputStream.flush();
} catch (Exception e) {
e.printStackTrace();
message = "对不起,文件上传失败了!!!!";
}
return SUCCESS;
}
}struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="struts2" extends="json-default">
<action name="fileUploadAction" class="com.ajaxfile.action.FileAction">
<result type="json" name="success">
<param name="contentType">
text/html
</param>
</result>
<result type="json" name="error">
<param name="contentType">
text/html
</param>
</result>
</action>
</package>
</struts>Pay attention to the configuration of result in struts.xml combined with Action.
The contentType parameter must be present, otherwise the browser will always prompt to save the returned JSON result as a file and will not hand it over to ajaxfileupload for processing. This is because the default contentType of struts2 JSON Plugin is application/json, while ajaxfileupload requires text/html.
JSP page for file upload
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/ajaxfileupload.js"></script>
<script type="text/javascript">
function ajaxFileUpload()
{
$("#loading")
.ajaxStart(function(){
$(this).show();
})//开始上传文件时显示一个图片
.ajaxComplete(function(){
$(this).hide();
});//文件上传完成将图片隐藏起来
$.ajaxFileUpload
(
{
url:'fileUploadAction.action',//用于文件上传的服务器端请求地址
secureuri:false,//一般设置为false
fileElementId:'file',//文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'json',//返回值类型 一般设置为json
success: function (data, status) //服务器成功响应处理函数
{
alert(data.message);//从服务器返回的json中取出message中的数据,其中message为在struts2中action中定义的成员变量
if(typeof(data.error) != 'undefined')
{
if(data.error != '')
{
alert(data.error);
}else
{
alert(data.message);
}
}
},
error: function (data, status, e)//服务器响应失败处理函数
{
alert(e);
}
}
)
return false;
}
</script>
</head>
<body>
<img src="loading.gif" id="loading" style="display: none;">
<input type="file" id="file" name="file" />
<br />
<input type="button" value="上传" onclick="return ajaxFileUpload();">
</body>
</html>Pay attention to the code in
, there is no form. The ajaxFileUpload() method is only triggered when the button is clicked. What needs to be noted is the order in which js files are introduced. ajaxfileupload.js depends on jquery, so you know.Related recommendations:
Code case for using FileUpload to complete upload in Java
Detailed explanation of problems that occur when uploading ajaxfileupload
10 recommended content about FileUpload
The above is the detailed content of Detailed explanation of ajax fileupload asynchronous upload plug-in. For more information, please follow other related articles on the PHP Chinese website!
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
How to upload lyrics to QQ Music
Feb 23, 2024 pm 11:45 PM
With the advent of the digital age, music platforms have become one of the main ways for people to obtain music. However, sometimes when we listen to songs, we find that there are no lyrics, which is very disturbing. Many people hope that lyrics can be displayed when listening to songs to better understand the content and emotions of the songs. QQ Music, as one of the largest music platforms in China, also provides users with the function of uploading lyrics, so that users can better enjoy music and feel the connotation of the songs. The following will introduce how to upload lyrics on QQ Music. first
Simple steps to upload your own music on Kugou
Mar 25, 2024 pm 10:56 PM
1. Open Kugou Music and click on your profile picture. 2. Click the settings icon in the upper right corner. 3. Click [Upload Music Works]. 4. Click [Upload Works]. 5. Select the song and click [Next]. 6. Finally, click [Upload].
How to solve the 403 error encountered by jQuery AJAX request
Feb 20, 2024 am 10:07 AM
Title: Methods and code examples to resolve 403 errors in jQuery AJAX requests. The 403 error refers to a request that the server prohibits access to a resource. This error usually occurs because the request lacks permissions or is rejected by the server. When making jQueryAJAX requests, you sometimes encounter this situation. This article will introduce how to solve this problem and provide code examples. Solution: Check permissions: First ensure that the requested URL address is correct and verify that you have sufficient permissions to access the resource.
How to solve jQuery AJAX request 403 error
Feb 19, 2024 pm 05:55 PM
jQuery is a popular JavaScript library used to simplify client-side development. AJAX is a technology that sends asynchronous requests and interacts with the server without reloading the entire web page. However, when using jQuery to make AJAX requests, you sometimes encounter 403 errors. 403 errors are usually server-denied access errors, possibly due to security policy or permission issues. In this article, we will discuss how to resolve jQueryAJAX request encountering 403 error
PHP and Ajax: Building an autocomplete suggestion engine
Jun 02, 2024 pm 08:39 PM
Build an autocomplete suggestion engine using PHP and Ajax: Server-side script: handles Ajax requests and returns suggestions (autocomplete.php). Client script: Send Ajax request and display suggestions (autocomplete.js). Practical case: Include script in HTML page and specify search-input element identifier.
How to improve computer upload speed
Jan 15, 2024 pm 06:51 PM
Upload speed becomes very slow? I believe this is a problem that many friends will encounter when uploading things on their computers. If the network is unstable when using a computer to transfer files, the upload speed will be very slow. So how can I increase the network upload speed? Below, the editor will tell you how to solve the problem of slow computer upload speed. When it comes to network speed, we all know that the speed of opening web pages, download speed, and upload speed are also very critical. Especially some users often need to upload files to the network disk, so a fast upload speed will undoubtedly save you a lot of money. Less time, what should I do if the upload speed is slow? Below, the editor brings you pictures and texts on how to deal with slow computer upload speeds. How to solve the problem of slow computer upload speed? Click "Start--Run" or "Window key"
How to solve the problem of jQuery AJAX error 403?
Feb 23, 2024 pm 04:27 PM
How to solve the problem of jQueryAJAX error 403? When developing web applications, jQuery is often used to send asynchronous requests. However, sometimes you may encounter error code 403 when using jQueryAJAX, indicating that access is forbidden by the server. This is usually caused by server-side security settings, but there are ways to work around it. This article will introduce how to solve the problem of jQueryAJAX error 403 and provide specific code examples. 1. to make
How to take photos and upload them on computer
Jan 16, 2024 am 10:45 AM
As long as the computer is equipped with a camera, it can take pictures, but some users still don't know how to take pictures and upload them. Now I will give you a detailed introduction to the method of taking pictures on the computer, so that users can upload the pictures wherever they want. How to take photos and upload them on a computer 1. Mac computer 1. Open Finder and click the application on the left. 2. After opening, click the Camera application. 3. Just click the photo button below. 2. Windows computer 1. Open the search box below and enter camera. 2. Then open the searched application. 3. Click the photo button next to it.
