项目需要实现一个无刷新批量文件上传功能,仔细研究了下,发现JQuery 提供的Uploadify插件十分不错,不过官方的实例是基于php的,下面我用jsp+servlet简单实现了这个功能,废话少说,先看效果图:
1、初始化页面:
2、选择多个文件(可一次多选)后:
3、点击开始上传(上传完就自动消失)
效果就是上面那样,页面不刷新。下面上代码:
1、首先先到官网下载最新的zip压缩包http://www.uploadify.com
2、项目结构:
3、关键代码:
index.jsp
- <%@ page language="java" contentType="text/html; charset=utf-8"%>
- <%
- String path = request.getContextPath();
- String basePath = request.getScheme() + "://"
- + request.getServerName() + ":" + request.getServerPort()
- + path + "/";
- %>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <base href="<%=basePath%>">
- <title>Upload</title>
- <!--装载文件-->
- <link href="css/default.css" rel="stylesheet" type="text/css" />
- <link href="css/uploadify.css" rel="stylesheet" type="text/css" />
- <script type="text/javascript" src="scripts/jquery-1.4.2.min.js"></script>
- <script type="text/javascript" src="scripts/swfobject.js"></script>
- <script type="text/javascript" src="scripts/jquery.uploadify.v2.1.4.min.js"></script>
- <!--ready事件-->
- <script type="text/javascript">
- $(document).ready(function() {
- $("#uploadify").uploadify({
- 'uploader' : 'scripts/uploadify.swf',
- 'script' : 'servlet/Upload',//后台处理的请求
- 'cancelImg' : 'images/cancel.png',
- 'folder' : 'uploads',//您想将文件保存到的路径
- 'queueID' : 'fileQueue',//与下面的id对应
- 'queueSizeLimit' : 5,
- 'fileDesc' : 'rar文件或zip文件',
- 'fileExt' : '*.rar;*.zip', //控制可上传文件的扩展名,启用本项时需同时声明fileDesc
- 'auto' : false,
- 'multi' : true,
- 'simUploadLimit' : 2,
- 'buttonText' : 'BROWSE'
- });
- });
- </script>
- </head>
- <body>
- <div id="fileQueue"></div>
- <input type="file" name="uploadify" id="uploadify" />
- <p>
- <a href="javascript:jQuery('#uploadify').uploadifyUpload()">开始上传</a>
- <a href="javascript:jQuery('#uploadify').uploadifyClearQueue()">取消所有上传</a>
- </p>
- </body>
- </html>
web.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app version="2.4"
- xmlns="http://java.sun.com/xml/ns/j2ee"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
- http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
- <servlet>
- <servlet-name>upload</servlet-name>
- <servlet-class>com.xzit.upload.Upload</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>upload</servlet-name>
- <url-pattern>/servlet/Upload</url-pattern>
- </servlet-mapping>
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- </web-app>
Upload.java
- package com.xzit.upload;
- import java.io.File;
- import java.io.IOException;
- import java.util.Iterator;
- import java.util.List;
- import java.util.UUID;
- import javax.servlet.ServletException;
- 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;
- @SuppressWarnings("serial")
- public class Upload extends HttpServlet {
- @SuppressWarnings("unchecked")
- public void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- String savePath = this.getServletConfig().getServletContext()
- .getRealPath("");
- savePath = savePath + "/uploads/";
- File f1 = new File(savePath);
- System.out.println(savePath);
- if (!f1.exists()) {
- f1.mkdirs();
- }
- DiskFileItemFactory fac = new DiskFileItemFactory();
- ServletFileUpload upload = new ServletFileUpload(fac);
- upload.setHeaderEncoding("utf-8");
- List 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(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();
- }
- }
- }
- response.getWriter().print(name + extName);
- }
- }