JAVA上传批量下载文件

笔记记录在此。

上传：目录结构：论述题ID/批次ID/省份ID/文件

String basePath = request().getContextPath();
				basePath = request().getScheme() + "://" + request().getServerName() + ":" + request().getServerPort() + basePath + "/";
				String realPath = request().getSession().getServletContext().getRealPath(""); // 获取服务器真实路径地址
				String root = "upload";
				String article = "article";
				String dir = ServletActionContext.getServletContext().getRealPath("/" + root);
				dir = dir.replaceAll("\\\\", "/");
				File f0 = new File(dir);// 根目录upload
				if (!f0.exists()) {
					f0.mkdir();
				}
				dir = dir + "/" + article;// 论述题目录article
				File f1 = new File(dir);
				if (!f1.exists()) {
					f1.mkdir();
				}
				dir = dir + "/" + peExamBatch.getId();// 当前批次目录
				File f2 = new File(dir);
				if (!f2.exists()) {
					f2.mkdir();
				}
				String code = bzzStudent.getPeEnterprise().getEnumConstByFlagSheng().getId();
				dir = dir + "/" + code;// 省份目录
				File f3 = new File(dir);
				if (!f3.exists()) {
					f3.mkdir();
				}
				dir = dir + "/" + bzzStudent.getRegNo() + prefix;
				if (getUpload() != null && !"".equals(getUpload().getPath())) {
					FileInputStream fis = new FileInputStream(getUpload());
					// 其实这里可以判断articlePath文件是否存在,如果存在直接存放而省去取批次,省以及学号等的数据库操作.安全起见
					FileOutputStream fos = new FileOutputStream(dir);
					int i = 0;
					byte[] buf = new byte[1024];
					while ((i = fis.read(buf)) != -1) {
						fos.write(buf, 0, i);
					}
					fos.flush();
					fos.close();
					String fullpath = root + "/" + article + "/" + peExamBatch.getId() + "/" + code;// upload/article/当前批次ID/企业所在省CODE
					String photoURL = basePath + fullpath + "/" + bzzStudent.getRegNo() + prefix;// 文件名为
					// 学号+后缀
					peBzzExamScore.setArticlePath(photoURL);
					this.getGeneralService().save(peBzzExamScore);
					request().setAttribute("js", "alert('您的论述题已成功上传!');window.location='/entity/workspaceStudent/bzzstudent_aboutArticle.action';");
				}

下载：

 

String root = "upload";
		String article = "article";
		String m = "alert('当前%s下还没有论述题');";
		String dir = ServletActionContext.getServletContext().getRealPath("/" + root);
		dir = dir.replaceAll("\\\\", "/");
		String upload = dir;// 记录下upload目录
		File f0 = new File(dir);// 根目录upload
		if (!f0.exists()) {
			request().setAttribute("js", String.format(m, "根目录"));
			return "message";
		}
		dir = dir + "/" + article;// 论述题目录article
		File f1 = new File(dir);
		if (!f1.exists()) {
			request().setAttribute("js", String.format(m, "论述题目录"));
			return "message";
		}
		dir = dir + "/" + peBzzExamBatch.getId();// 当前批次目录
		File f2 = new File(dir);
		if (!f2.exists()) {
			request().setAttribute("js", String.format(m, "批次"));
			return "message";
		}
		String zip = dir + "/zip";// 临时目录用于存放压缩后文件目录
		String srctemp = dir + "/srctemp";// 临时目录用于存放要压缩文件的目录
		String provid = request().getParameter("prov");
		if (StringUtils.isEmpty(provid)) {
			request().setAttribute("js", "alert('请先选择省份!');");
			return "message";
		}
		dir = dir + "/" + provid;// 省份
		File f3 = new File(dir);
		if (!f3.exists()) {
			request().setAttribute("js", String.format(m, "省份"));
			return "message";
		}
		File f4 = new File(zip);
		if (!f4.exists()) {
			f4.mkdir();
		}
		String enterpriseid = request().getParameter("enterprise");
		FileManage filemanage = FileManageFactory.creat();
		try {
			if (StringUtils.isNotEmpty(enterpriseid) && !"-1".equals(enterpriseid)) {// 如果选择了一级工作单位
				DetachedCriteria score = DetachedCriteria.forClass(PeBzzExamScore.class);
				DetachedCriteria student = score.createCriteria("peBzzStudent", "peBzzStudent");
				DetachedCriteria pe = student.createCriteria("peEnterprise", "peEnterprise");
				student.add(Restrictions.or(Restrictions.eq("peBzzStudent.peEnterprise.id", enterpriseid), Restrictions.eq("peEnterprise.peEnterprise.id", enterpriseid)));
				score.createCriteria("enumConstByFlagExamScoreStatus", "enumConstByFlagExamScoreStatus");
				score.add(Restrictions.eq("enumConstByFlagExamScoreStatus.id", "402880a9aaadc115061dadfcf26b0003"));// 已审核
				String enterpriseid2 = request().getParameter("enterprise2");
				if (StringUtils.isNotEmpty(enterpriseid2) && !"-1".equals(enterpriseid2)) {// 如果选择了二级工作单位
					pe.add(Restrictions.eq("peEnterprise.id", enterpriseid2));
				}
				List<PeBzzExamScore> scores = this.getGeneralService().getDetachList(score);
				if (scores != null && scores.size() == 0) {
					request().setAttribute("js", "alert('当前条件下没有论述题');");
					return "message";
				}
				File f5 = new File(srctemp);
				if (!f5.exists()) {
					f5.mkdir();
				}
				dir = srctemp;
				for (PeBzzExamScore s : scores) {
					String path = s.getArticlePath();
					if (StringUtils.isNotEmpty(path)) {
						int index = path.indexOf("/article");
						if (index > 0) {
							String str = path.substring(index);
							filemanage.copyFile(upload + str, srctemp);// 复制文件
						}
					}
				}
			}
			String targetFile = zip + "/" + provid + ".zip";
			if (filemanage.isExist(targetFile)) {
				filemanage.delete(targetFile);
			}
			if (!filemanage.getSize(dir).equals("0B")) {
				filemanage.zip(dir, targetFile);// 压缩至指定文件夹
				String basePath = request().getContextPath();
				basePath = request().getScheme() + "://" + request().getServerName() + ":" + request().getServerPort() + basePath + "/";
				int index = targetFile.indexOf("upload/");
				if (index > 0) {
					String str = targetFile.substring(index);
					// request().setAttribute("js",
					// String.format("window.open('%s');", basePath+str));
					request().setAttribute("msg", "下载页面");
					request().setAttribute("js", String.format("window.location.href='%s';", basePath + str));
					return "message";
				}
			} else {
				request().setAttribute("js", "alert('当前条件下没有论述题');");
				return "message";
			}
		} catch (Exception e) {
			request().setAttribute("msg", "导出失败!");
			e.printStackTrace();
		}
		return "message";