サーバーへのファイルアップロード機能を実現するJSP＋サーブレット

String extendedName = picturePath.substring(picturePath.lastIndexOf(". "),// Truncate the substring from the last '.' to the end of the string.
 picturePath.length());
 // Rename the file name to a globally unique file name
 String uniqueName = UUID.randomUUID().toString();
 saveFileName = uniqueName + extendedName;// splice pathname

 // increase
 public void add(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {
 System.out.println("add method was called");
 // Get the data
 int id = 0;
 String username = null;
 String password = null;
 String sex = null;
 Date birthday = null;
 String address = null;
 String saveFileName = null;
 String picturePath = null;
 // Get if the form is submitted with enctype="multipart/form-data"
 boolean isMulti = ServletFileUpload.isMultipartContent(request);
 if (isMulti) {
 // Get the file upload object via FileItemFactory
 FileItemFactory fif = new DiskFileItemFactory();
 ServletFileUpload upload = new ServletFileUpload(fif);
 
 try {
 List<FileItem> items = upload.parseRequest(request);
 for (FileItem item : items) {
 // Determine if it is a normal form control or a file upload form control
 boolean isForm = item.isFormField();
 if (isForm) {// is a normal form control
 String name = item.getFieldName();
 if ("id".equals(name)) {
 id = Integer.parseInt(item.getString("utf-8"));
 System.out.println(id);
 }
 if ("sex".equals(name)) {
 sex = item.getString("utf-8");
 System.out.println(sex);
 }
 if ("username".equals(name)) {
 username = item.getString("utf-8");
 System.out.println(username);
 }
 if ("password".equals(name)) {
 password = item.getString("utf-8");
 System.out.println(password);
 }
 if ("birthday".equals(name)) {
 String birthdayStr = item.getString("utf-8");
 SimpleDateFormat sdf = new SimpleDateFormat(
  "yyyy-MM-dd");
 try {
 birthday = sdf.parse(birthdayStr);
 } catch (ParseException e) {
 e.printStackTrace();
 }
 System.out.println(birthday);
 }
 if ("address".equals(name)) {
 address = item.getString("utf-8");
 System.out.println(address);
 }
 if ("picturePath".equals(name)) {
 picturePath = item.getString("utf-8");
 System.out.println(picturePath);
 }
 } else {// is a file upload form control
 // get the file name xxx.jpg
 String sourceFileName = item.getName();
 // get the extension of the file name: .jpg
 String extendedName = sourceFileName.substring(
 sourceFileName.lastIndexOf(". "),
 sourceFileName.length());
 // Rename the file name to a globally unique file name
 String uniqueName = UUID.randomUUID().toString();
 saveFileName = uniqueName + extendedName;
 // Get the path to the file uploaded to the server
 // C:\\apache-tomcat-7.0.47\\webapps\\\taobaoServlet4\\\\upload\\\xx.jpg
 String uploadFilePath = request.getSession()
 .getServletContext().getRealPath("upload/");
 File saveFile = new File(uploadFilePath, saveFileName);
 // Write out the saved file to the server's hard drive
 try {
 item.write(saveFile);
 } catch (Exception e) {
 e.printStackTrace();
 }
 }
 }
 } catch (NumberFormatException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (FileUploadException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 // 2. Wrapping data
 User user = new User(id, username, password, sex, birthday, address,
 saveFileName);
 // 3. Call the logic layer API
 IUserService iUserService = new UserServiceImpl();
 // 4. Control jumping
 HttpSession session = request.getSession();
 if (iUserService.save(user) > 0) {
 System.out.println("Added new user successfully! ");
 List<User> users = new ArrayList<User>();
 users = iUserService.listAll();
 session.setAttribute("users", users);
 response.sendRedirect("UserServlet?action=getPage");
 } else {
 System.out.println("Failed to add new user! ");
 PrintWriter out = response.getWriter();
 out.print("<script type='text/javascript'>");
 out.print("alert('Failed to add new user! Please try again!') ;");
 out.print("</script>");
 }
 }

 // change
 public void update(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {
 System.out.println("update method was called");
 HttpSession session = request.getSession();
 // Get the data
 int id = (int)session.getAttribute("id");
 String username = null;
 String password = null;
 String sex = null;
 Date birthday = null;
 String address = null;
 String saveFileName = null;
 String picturePath = null;
 IUserService iUserService = new UserServiceImpl();
 // Get whether the form is submitted with enctype="multipart/form-data"
 boolean isMulti = ServletFileUpload.isMultipartContent(request);
 if (isMulti) {
 // Get the file upload object via FileItemFactory
 FileItemFactory fif = new DiskFileItemFactory();
 ServletFileUpload upload = new ServletFileUpload(fif);
 try {
 List<FileItem> items = upload.pa