public class FileUtil { private String filePath; private SimpleDateFormat sdf; public FileUtil() { sdf = new SimpleDateFormat(“yyyy-MM-dd”); filePath = “C:” + File.separator + “files” + File.separator + sdf.format(System.currentTimeMillis()); } public List<AttachFile> fileSave(Collection<Part> parts) { File f = new File(filePath); List<AttachFile> attachFileList = new ArrayList<>(); if (!f.exists()) { f.mkdirs(); } for (Part part : parts) { […]