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

[java]
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';");
                }

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.replace

补充：软件开发 , Java ,