有进度条的上传文件的项目源码，支持2个G的大文件上传，同时多文件同时上传

import java.io.File; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; import javax.servlet.http.HttpServletRequest; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.lang.StringUtils; public class FileUtil { public static String getUUID() { return UUID.randomUUID().toString().replaceAll("-", ""); } public static Long getTime14() { return Long.parseLong(new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()).toString()); } public static Long getTime8() { return Long.parseLong(new SimpleDateFormat("yyyyMMdd").format(new Date()).toString()); } /** * <p>功能描述：14位或8位的long转为calendar</p> * * @param time * @return * @author 胡晓 <BR> kskr@qq.com <BR> * 时间：2010-3-11 下午06:38:55 <BR> */ public static Calendar long2calendar(Long time) { if (time == null) { return null; } Calendar calendar = null; String timeStr = time.toString(); if (timeStr.length() == 14) { int year = Integer.parseInt(timeStr.substring(0, 4)); int month = Integer.parseInt(timeStr.substring(4, 6)); int day = Integer.parseInt(timeStr.substring(6, 8)); int hour = Integer.parseInt(timeStr.substring(8, 10)); int minute = Integer.parseInt(timeStr.substring(10, 12)); int second = Integer.parseInt(timeStr.substring(12, 14)); calendar = new GregorianCalendar(year, month, day, hour, minute, second); } else if (timeStr.length() == 8) { int year = Integer.parseInt(timeStr.substring(0, 4)); int month = Integer.parseInt(timeStr.substring(4, 6)); int day = Integer.parseInt(timeStr.substring(6, 8)); calendar = new GregorianCalendar(year, month, day); } return calendar; } /** * <p>功能描述：Calendar2Long</p> * * @param calendar * @param length * @return * @author 胡晓 <BR> kskr@qq.com <BR> * 时间：2010-3-11 下午06:56:41 <BR> */ public static Long Calendar2Long(Calendar calendar, int length) { String format = length == 8 ? "yyyyMMdd" : "yyyyMMddHHmmss"; return Long.valueOf(new SimpleDateFormat(format).format(calendar.getTime()).toString()); } /** * <p>功能描述：Calendar2Long</p> * * @param calendar * @return * @author 胡晓 <BR> kskr@qq.com <BR> * 时间：2010-3-11 下午06:57:54 <BR> */ public static Long Calendar2Long(Calendar calendar){ return Calendar2Long(calendar, 14); } /** * 功能描述：日期格式化<BR> * * @param str * yyyy-mm-dd * @param time * @return * @author:杨凯<BR> * 时间：Apr 10, 2009 12:44:00 PM<BR> */ public static String format(String str, Long time) { if (time == null) { return null; } String strTime = String.valueOf(time); str = str.replaceAll("yyyy", strTime.substring(0, 4)); str = str.replaceAll("mm", strTime.substring(4, 6)); if (StringUtils.contains(str, "dd")) { str = str.replaceAll("dd", strTime.substring(6, 8)); } if (StringUtils.contains(str, "hh")) { str = str.replaceAll("hh", strTime.substring(8, 10)); } if (StringUtils.contains(str, "MM")) { str = str.replaceAll("MM", strTime.substring(10, 12)); } if (StringUtils.contains(str, "ss")) { str = str.replaceAll("ss", strTime.substring(12, 14)); } return str; } /** * <p>功能描述：使用fileupload components 上传多个文件</p> * * @param request * @return * @author 胡晓 <BR> kskr@qq.com <BR> * 时间：2010-3-11 下午11:10:38 <BR> */ public static List<Map> UploadFilesByFileupload(HttpServletRequest request) { boolean isMultipart = ServletFileUpload.isMultipartContent(request); List<Map> resultList = new ArrayList<Map>(); if(!isMultipart){ return resultList; } String userfilepath = request.getRealPath("userfile"); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(2 * 1024 * 1024);// 2MB factory.setRepository(new File(userfilepath)); ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(100 * 1024 * 1024);// 100MB try { List<FileItem> items = upload.parseRequest(request); for (FileItem item : items) { if (item.isFormField()) { //普通表单 } else { String fieldName = item.getFieldName(); String fileName = item.getName(); //如果文件域没有填写内容，或者填写的文件不存在 if (StringUtils.isBlank(fileName) || item.getSize() == 0) { continue; } String date = "/" + getTime8() + "/"; String extName = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()); String newfilename = getUUID() + "." + extName; File uploadedFile = new File(userfilepath + date + newfilename); if (!uploadedFile.exists()) {// 如果要写入的文件或目录不存在，那么试着创建要写入的目录，以便写入文件 uploadedFile.getParentFile().mkdirs(); } item.write(uploadedFile); Map tmpfile = new HashMap(); tmpfile.put("fieldname", fieldName); tmpfile.put("filename", fileName.substring(fileName.lastIndexOf(File.separator) + 1, fileName.length())); tmpfile.put("extname", extName); tmpfile.put("filepath", "/userfile"+ date + newfilename); resultList.add(tmpfile); } } } catch (Exception e) { e.printStackTrace(); } finally{ return resultList; } } }