項目需要實現一個無刷新批量文件上傳功能，仔細研究了下，發現JQuery 提供的Uploadify插件十分不錯，不過官方的實例是基於php的，下面我用jsp+servlet簡單實現了這個功能，廢話少說，先看效果圖：
1、初始化頁面：
2、選擇多個文件（可一次多選）后：
3、點擊開始上傳（上傳完就自動消失）
效果就是上面那樣，頁面不刷新。下面上代碼：
1、首先先到官網下載最新的zip壓縮包http://www.uploadify.com
2、項目結構：
3、關鍵代碼：
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> <!--裝載文件--> <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',//后台處理的請求 'cancelImg' : 'images/cancel.png', 'folder' : 'uploads',//您想將文件保存到的路徑 'queueID' : 'fileQueue',//與下面的id對應 'queueSizeLimit' : 5, 'fileDesc' : 'rar文件或zip文件', 'fileExt' : '*.rar;*.zip', //控制可上傳文件的擴展名，啟用本項時需同時聲明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()">開始上傳</a> <a href="javascript:jQuery('#uploadify').uploadifyClearQueue()">取消所有上傳</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; } //擴展名格式： 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); } }