public File doAttachment(HttpServletRequest request)
throws ServletException, IOException {
File file = null;
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
try {
List<?> items = upload.parseRequest(request);
Iterator<?> itr = items.iterator();
while (itr.hasNext()) {
FileItem item = (FileItem) itr.next();
if (item.isFormField()) {
parameters
.put(item.getFieldName(), item.getString("UTF-8"));
} else {
File tempFile = new File(item.getName());
file = new File(sc.getRealPath("/") + savePath, tempFile
.getName());
item.write(file);
}
}
} catch (Exception e) {
Logger logger = Logger.getLogger(SendAttachmentMailServlet.class);
logger.error("邮件发送出了异常", e);
}
return file;
}
@Override
public int compareTo(FileItem another) {
if (another.isDir()) {
return -1;
} else {
return this.getName().compareTo(another.getName());
}
}
/**
* Add listener to fileItem which is going to be automatically destroyed when the servlet is
* destroyed
*
* @param pipelineContext PipelineContext
* @param fileItem FileItem
*/
public static void deleteFileOnContextDestroyed(
PipelineContext pipelineContext, final FileItem fileItem) {
// Try to delete the file on exit and on session termination
final ExternalContext externalContext =
(ExternalContext) pipelineContext.getAttribute(PipelineContext.EXTERNAL_CONTEXT);
ExternalContext.Application application = externalContext.getApplication();
if (application != null) {
application.addListener(
new ExternalContext.Application.ApplicationListener() {
public void servletDestroyed() {
deleteFileItem(fileItem, APPLICATION_SCOPE);
}
});
} else {
logger.debug(
"No application object found so cannot register temporary file deletion upon session destruction: "
+ fileItem.getName());
}
}
/**
* Add listener to fileItem which is going to be automatically destroyed on session destruction
*
* @param pipelineContext PipelineContext
* @param fileItem FileItem
*/
public static void deleteFileOnSessionTermination(
PipelineContext pipelineContext, final FileItem fileItem) {
// Try to delete the file on exit and on session termination
final ExternalContext externalContext =
(ExternalContext) pipelineContext.getAttribute(PipelineContext.EXTERNAL_CONTEXT);
final ExternalContext.Session session = externalContext.getSession(false);
if (session != null) {
session.addListener(
new ExternalContext.Session.SessionListener() {
public void sessionDestroyed() {
deleteFileItem(fileItem, SESSION_SCOPE);
}
});
} else {
logger.debug(
"No existing session found so cannot register temporary file deletion upon session destruction: "
+ fileItem.getName());
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
for (FileItem item : items) {
if (item.isFormField()) {
// Process regular form field (input type="text|radio|checkbox|etc", select, etc).
String fieldname = item.getFieldName();
String fieldvalue = item.getString();
// ... (do your job here)
} else {
// Process form file field (input type="file").
String fieldname = item.getFieldName();
String filename = FilenameUtils.getName(item.getName());
InputStream filecontent = item.getInputStream();
// ... (do your job here)
}
}
} catch (FileUploadException e) {
throw new ServletException("Cannot parse multipart request.", e);
}
// ...
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String id_book = "", len = "";
// Imposto il content type della risposta e prendo l'output
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
// La dimensione massima di ogni singolo file su system
int dimensioneMassimaDelFileScrivibieSulFileSystemInByte = 10 * 1024 * 1024; // 10 MB
// Dimensione massima della request
int dimensioneMassimaDellaRequestInByte = 20 * 1024 * 1024; // 20 MB
// Cartella temporanea
File cartellaTemporanea = new File("C:\\tempo");
try {
// Creo un factory per l'accesso al filesystem
DiskFileItemFactory factory = new DiskFileItemFactory();
// Setto la dimensione massima di ogni file, opzionale
factory.setSizeThreshold(dimensioneMassimaDelFileScrivibieSulFileSystemInByte);
// Setto la cartella temporanea, Opzionale
factory.setRepository(cartellaTemporanea);
// Istanzio la classe per l'upload
ServletFileUpload upload = new ServletFileUpload(factory);
// Setto la dimensione massima della request, opzionale
upload.setSizeMax(dimensioneMassimaDellaRequestInByte);
// Parso la riquest della servlet, mi viene ritornata una lista di FileItem con
// tutti i field sia di tipo file che gli altri
List<FileItem> items = upload.parseRequest(request);
/*
*
* Giro per tutti i campi inviati
*/
for (int i = 0; i < items.size(); i++) {
FileItem item = items.get(i);
// Controllo se si tratta di un campo di input normale
if (item.isFormField()) {
// Prendo solo il nome e il valore
String name = item.getFieldName();
String value = item.getString();
if (name.equals("id_book")) {
id_book = value;
}
if (name.equals("len")) {
len = value;
}
}
// Se si stratta invece di un file ho varie possibilità
else {
// Dopo aver ripreso tutti i dati disponibili
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
// scrivo direttamente su filesystem
File uploadedFile =
new File("/Users/Babol/Desktop/dVruhero/aMuseWebsite/web/userPhoto/" + fileName);
// Solo se veramente ho inviato qualcosa
if (item.getSize() > 0) {
item.write(uploadedFile);
DBconnection.EditCoverBook(fileName, Integer.parseInt(id_book));
}
}
}
// out.println("</body>");
// out.println("</html>");
} catch (Exception ex) {
System.out.println("Errore: " + ex.getMessage());
} finally {
if (len.equals("ita")) response.sendRedirect("modify_book.jsp?id_book=" + id_book);
else response.sendRedirect("modify_book_eng.jsp?id_book=" + id_book);
}
}
/**
* 文件的上传服务
*
* @param request
* @return
* @throws FileUploadException
* @throws IOException
*/
public FileRepository uploadFile(HttpServletRequest request)
throws FileUploadException, IOException {
boolean isMultipartContent = ServletFileUpload.isMultipartContent(request);
FileRepository fileRepository = null;
if (isMultipartContent) {
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List<FileItem> items = upload.parseRequest(request);
for (Iterator<FileItem> iterator = items.iterator(); iterator.hasNext(); ) {
FileItem item = iterator.next();
InputStream inputStream = item.getInputStream();
// 获得文件名
String fileName = item.getName();
String fileExtension = FileUtil.getFileExtension(fileName);
// 获得文件的Extension类型
MimeTypeExtension mimeTypeExtension =
mimeTypeExtensionService.findByMimeTypeExtensionName(fileExtension);
fileRepository = new FileRepository();
FixEntityUtil.fixEntity(fileRepository);
String fileRepoId = fileRepository.getId();
fileRepository.setMimeTypeExtensionName(fileExtension);
if (mimeTypeExtension.getMimeType() != null) {
fileRepository.setMimeTypeName(mimeTypeExtension.getMimeType().getMimeTypeName());
}
fileRepository.setFileName(fileName);
String datePath = new SimpleDateFormat("yyyy/MM/dd").format(new Date());
String saveFilePath = Config.UPLOAD_FILE_PATH + "/" + datePath + "/";
File file = new File(saveFilePath);
if (!file.exists()) {
file.mkdirs();
}
file = new File(saveFilePath + fileRepoId + ".xzsoft");
ByteArrayOutputStream out = new ByteArrayOutputStream();
int byteRead = 0;
byte[] buffer = new byte[8192];
while ((byteRead = inputStream.read(buffer, 0, 8192)) != -1) {
out.write(buffer, 0, byteRead);
}
inputStream.close();
// 将上传的文件变Base64加密过的字符串
String content = Base64.encode(out.toByteArray());
out.close();
// 将加密过后的数据存储到硬盘中
FileWriter fileWriter = new FileWriter(file);
BufferedWriter bw = new BufferedWriter(fileWriter);
bw.write(content);
bw.flush();
fileWriter.flush();
bw.close();
fileWriter.close();
}
} else {
throw new NotMultipartRequestException("上传的文件里面没有Multipart内容");
}
return fileRepository;
}
