Java Code Examples for org.apache.commons.fileupload.FileItem#getFieldName()

/**
 *
 * @param request Servlet请求
 * @param params 一个预备的键值表储存非文件流的参数Map
 * @return 上传的文件流
 */
public static InputStream parseUpload(HttpServletRequest request, Map<String,String> params){
    InputStream is = null;
    try{
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        factory.setSizeThreshold(10*1024*1024);
        List<FileItem> items= upload.parseRequest(request);
        for (FileItem item : items) {
            if (!item.isFormField()) {
                is = item.getInputStream();
            } else {
                String paramName = item.getFieldName();
                String paramValue = item.getString();
                paramValue = new String(paramValue.getBytes("ISO-8859-1"), "UTF-8");
                params.put(paramName, paramValue);
            }
        }
    }catch (Exception e){
        e.printStackTrace();
    }
    return is;
}
 

private void handleMultipartForm(ActionRequest request, RequestContextIFace requestContext) throws Exception {
	SourceBean serviceRequest = requestContext.getServiceRequest();

	// Create a factory for disk-based file items
	FileItemFactory factory = new DiskFileItemFactory();

	// Create a new file upload handler
	PortletFileUpload upload = new PortletFileUpload(factory);

	// Parse the request
	List fileItems = upload.parseRequest(request);
	Iterator iter = fileItems.iterator();
	while (iter.hasNext()) {
		FileItem item = (FileItem) iter.next();

		if (item.isFormField()) {
			String name = item.getFieldName();
			String value = item.getString();
			serviceRequest.setAttribute(name, value);
		} else {
			processFileField(item, requestContext);
		}
	}
}
 

/**
 * Handle multipart form.
 * 
 * @param request        the request
 * @param requestContext the request context
 * 
 * @throws Exception the exception
 */
private void handleMultipartForm(HttpServletRequest request, RequestContextIFace requestContext) throws Exception {
	SourceBean serviceRequest = requestContext.getServiceRequest();

	// Create a factory for disk-based file items
	FileItemFactory factory = new DiskFileItemFactory();

	// Create a new file upload handler
	ServletFileUpload upload = new ServletFileUpload(factory);

	// Parse the request
	List fileItems = upload.parseRequest(request);
	Iterator iter = fileItems.iterator();
	while (iter.hasNext()) {
		FileItem item = (FileItem) iter.next();

		if (item.isFormField()) {
			String name = item.getFieldName();
			String value = item.getString(request.getCharacterEncoding());
			serviceRequest.setAttribute(name, value);
		} else {
			processFileField(item, requestContext);
		}
	}
}
 

/**
 * Handle multipart form.
 * 
 * @param request the request
 * @param requestContext the request context
 * 
 * @throws Exception the exception
 */
private void handleMultipartForm(ActionRequest request, RequestContextIFace requestContext) throws Exception {
	SourceBean serviceRequest = requestContext.getServiceRequest();
	
	// Create a factory for disk-based file items
	FileItemFactory factory = new DiskFileItemFactory();
	
    // Create a new file upload handler
	PortletFileUpload upload = new PortletFileUpload(factory);

    // Parse the request
    List fileItems = upload.parseRequest(request);
    Iterator iter = fileItems.iterator();
    while (iter.hasNext()) {
        FileItem item = (FileItem) iter.next();

        if (item.isFormField()) {
            String name = item.getFieldName();
            String value = item.getString();
            serviceRequest.setAttribute(name, value);
        } else {
            processFileField(item, requestContext);
        }
    }
}
 

private FileItem handleMultipartForm(HttpServletRequest request) throws Exception {

		// Create a factory for disk-based file items
		FileItemFactory factory = new DiskFileItemFactory();

		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);

		// Parse the request
		List fileItems = upload.parseRequest(request);
		Iterator iter = fileItems.iterator();

		while (iter.hasNext()) {
			FileItem item = (FileItem) iter.next();
			if (item.isFormField()) {
				String name = item.getFieldName();
				String value = item.getString();
			} else {
				return item;
			}
		}
		return null;
	}
 

/**
 * Handle multipart form.
 * 
 * @param request        the request
 * @param requestContext the request context
 * 
 * @throws Exception the exception
 */
private void handleMultipartForm(HttpServletRequest request, RequestContextIFace requestContext) throws Exception {
	SourceBean serviceRequest = requestContext.getServiceRequest();

	// Create a factory for disk-based file items
	FileItemFactory factory = new DiskFileItemFactory();

	// Create a new file upload handler
	ServletFileUpload upload = new ServletFileUpload(factory);

	// Parse the request
	List fileItems = upload.parseRequest(request);
	Iterator iter = fileItems.iterator();
	while (iter.hasNext()) {
		FileItem item = (FileItem) iter.next();

		if (item.isFormField()) {
			String name = item.getFieldName();
			String value = item.getString(request.getCharacterEncoding());
			serviceRequest.setAttribute(name, value);
		} else {
			processFileField(item, requestContext);
		}
	}
}
 

public void importExcelTemplate(HttpServletRequest req, HttpServletResponse resp) throws Exception {
	DiskFileItemFactory factory=new DiskFileItemFactory();
	ServletFileUpload upload = new ServletFileUpload(factory);
	List<FileItem> items = upload.parseRequest(req);
	Iterator<FileItem> itr = items.iterator();
	List<Map<String,Object>> mapData=null;
	while (itr.hasNext()) {
		FileItem item = (FileItem) itr.next();
		String name=item.getFieldName();
		if(!name.equals("file")){
			continue;
		}
		InputStream stream=item.getInputStream();
		mapData=parseExcel(stream);
		httpSessionKnowledgeCache.put(req, IMPORT_EXCEL_DATA, mapData);
		stream.close();
		break;
	}
	httpSessionKnowledgeCache.put(req, IMPORT_EXCEL_DATA, mapData);
	writeObjectToJson(resp, mapData);
}
 

private void handleFileUpload(PoseidonRequest request, HttpServletRequest httpRequest) throws IOException {
    // If uploaded file size is more than 10KB, will be stored in disk
    DiskFileItemFactory factory = new DiskFileItemFactory();
    File repository = new File(FILE_UPLOAD_TMP_DIR);
    if (repository.exists()) {
        factory.setRepository(repository);
    }

    // Currently we don't impose max file size at container layer. Apps can impose it by checking FileItem
    // Apps also have to delete tmp file explicitly (if at all it went to disk)
    ServletFileUpload upload = new ServletFileUpload(factory);
    List<FileItem> fileItems = null;
    try {
        fileItems = upload.parseRequest(httpRequest);
    } catch (FileUploadException e) {
        throw new IOException(e);
    }
    for (FileItem fileItem : fileItems) {
        String name = fileItem.getFieldName();
        if (fileItem.isFormField()) {
            request.setAttribute(name, new String[] { fileItem.getString() });
        } else {
            request.setAttribute(name, fileItem);
        }
    }
}
 

/**
 * 解析
 * @param exchange 请求对象
 * @param marsParams 参数
 * @param files 文件
 * @param contentType 内容类型
 * @return 参数和文件
 */
public static Map<String,Object> parsing(HttpExchange exchange, Map<String, List<String>> marsParams, Map<String, MarsFileUpLoad> files, String contentType) throws Exception {
    Map<String,Object> result = new HashMap<>();

    List<FileItem> fileItemList = getFileItem(exchange,contentType);

    for(FileItem item : fileItemList){
        if(item.isFormField()){
            String name = item.getFieldName();
            String value = item.getString(MarsConstant.ENCODING);
            List<String> params = marsParams.get(name);
            if(params == null){
                params = new ArrayList<>();
            }
            params.add(value);
            marsParams.put(name,params);
        } else {
            MarsFileUpLoad marsFileUpLoad = new MarsFileUpLoad();
            marsFileUpLoad.setName(item.getFieldName());
            marsFileUpLoad.setInputStream(item.getInputStream());
            marsFileUpLoad.setFileName(item.getName());
            files.put(marsFileUpLoad.getName(),marsFileUpLoad);
        }
    }

    result.put(PARAMS_KEY,marsParams);
    result.put(FILES_KEY,files);
    return result;
}
 

private String[] processUploadedFile(FileItem item, JobDeploymentDescriptor jobDeploymentDescriptor) throws ZipException, IOException, SpagoBIEngineException {
	String fieldName = item.getFieldName();
    String fileName = item.getName();
    String contentType = item.getContentType();
    boolean isInMemory = item.isInMemory();
    long sizeInBytes = item.getSize();
    
    if(fieldName.equalsIgnoreCase("deploymentDescriptor")) return null;
    
    RuntimeRepository runtimeRepository = TalendEngine.getRuntimeRepository();
    File jobsDir = new File(runtimeRepository.getRootDir(), jobDeploymentDescriptor.getLanguage().toLowerCase());
	File projectDir = new File(jobsDir, jobDeploymentDescriptor.getProject());
	File tmpDir = new File(projectDir, "tmp");
	if(!tmpDir.exists()) tmpDir.mkdirs();	   
     File uploadedFile = new File(tmpDir, fileName);
    
    try {
		item.write(uploadedFile);
	} catch (Exception e) {
		e.printStackTrace();
	}	
	
	String[] dirNames = ZipUtils.getDirectoryNameByLevel(new ZipFile(uploadedFile), 2);
	List dirNameList = new ArrayList();
	for(int i = 0; i < dirNames.length; i++) {
		if(!dirNames[i].equalsIgnoreCase("lib")) dirNameList.add(dirNames[i]);
	}
	String[] jobNames = (String[])dirNameList.toArray(new String[0]);
	
    runtimeRepository.deployJob(jobDeploymentDescriptor, new ZipFile(uploadedFile));
    uploadedFile.delete();	
    tmpDir.delete();
    
    return jobNames;
}
 

protected void addTextParameter(final HttpServletRequest request, final FileItem item) {
    final String name = item.getFieldName();
    final String encoding = request.getCharacterEncoding();
    String value = null;
    boolean haveValue = false;
    if (encoding != null) {
        try {
            value = item.getString(encoding);
            haveValue = true;
        } catch (final Exception e) {}
    }
    if (!haveValue) {
        try {
            value = item.getString("ISO-8859-1");
        } catch (final java.io.UnsupportedEncodingException uee) {
            value = item.getString();
        }
        haveValue = true;
    }
    if (request instanceof MultipartRequestWrapper) {
        final MultipartRequestWrapper wrapper = (MultipartRequestWrapper) request;
        wrapper.setParameter(name, value);
    }
    final String[] oldArray = elementsText.get(name);
    final String[] newArray;
    if (oldArray != null) {
        newArray = new String[oldArray.length + 1];
        System.arraycopy(oldArray, 0, newArray, 0, oldArray.length);
        newArray[oldArray.length] = value;
    } else {
        newArray = new String[] { value };
    }
    elementsText.put(name, newArray);
    elementsAll.put(name, newArray);
}
 

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
 *      response)
 */
protected void doPost(HttpServletRequest request,
		HttpServletResponse response) throws ServletException, IOException {
	// �ж��ϴ����Ƿ�����ļ�
	boolean isMultipart = ServletFileUpload.isMultipartContent(request);
	if (isMultipart) {
		// ��ȡ·��
		String realpath = request.getSession().getServletContext()
				.getRealPath("/files");
		System.out.println(realpath);

		File dir = new File(realpath);
		if (!dir.exists())
			dir.mkdirs();
		
		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		try {
			// ����������� ��ʵ���� form����ÿ��input�ڵ�
			List<FileItem> items = upload.parseRequest(request);
			for (FileItem item : items) {
				if (item.isFormField()) {
					// ����DZ� ����ÿ���� ��ӡ������̨
					String name1 = item.getFieldName();// �õ��������������
					String value = item.getString("UTF-8");// �õ�����ֵ
					System.out.println(name1 + "=" + value);
				} else {
					// ���ļ�д����ǰservlet����Ӧ��·��
					item.write(new File(dir, System.currentTimeMillis()
							+ item.getName().substring(
									item.getName().lastIndexOf("."))));
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
 

/**
	 * Creates a BufferedInputStream to get ready to upload file selected. Used
	 * by Add Podcast and Revise Podcast pages.
	 * 
	 * @param event
	 *            ValueChangeEvent object generated by selecting a file to
	 *            upload.
	 *            
	 * @throws AbortProcessingException
	 * 			Internal processing error attempting to set up BufferedInputStream
	 */
	public void processFileUpload(ValueChangeEvent event)
			throws AbortProcessingException {
		UIComponent component = event.getComponent();

		Object newValue = event.getNewValue();
		Object oldValue = event.getOldValue();
		PhaseId phaseId = event.getPhaseId();
		Object source = event.getSource();
//		log.info("processFileUpload() event: " + event
//				+ " component: " + component + " newValue: " + newValue
//				+ " oldValue: " + oldValue + " phaseId: " + phaseId
//				+ " source: " + source);

		if (newValue instanceof String)
			return;
		if (newValue == null)
			return;

		FileItem item = (FileItem) event.getNewValue();
		String fieldName = item.getFieldName();
		filename = FilenameUtils.getName(item.getName());
		fileSize = item.getSize();
		fileContentType = item.getContentType();
//		log.info("processFileUpload(): item: " + item
//				+ " fieldname: " + fieldName + " filename: " + filename
//				+ " length: " + fileSize);

		// Read the file as a stream (may be more memory-efficient)
		try {
			fileAsStream = new BufferedInputStream(item.getInputStream());
			
		} 
		catch (IOException e) {
			log.warn("IOException while attempting to set BufferedInputStream to upload "
							+ filename + " from site " + podcastService.getSiteId() + ". "
									 + e.getMessage(), e);
			setErrorMessage(INTERNAL_ERROR_ALERT);

		}

	}
 

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_HTML)
@GenerateLink(rel = Constants.LINK_REL_CREATE_PAIR)
public Response createPair(Iterator<FileItem> formData)
    throws BadRequestException, ServerException, ConflictException {
  String service = null;
  String name = null;
  String privateKey = null;
  String publicKey = null;

  while (formData.hasNext()) {
    FileItem item = formData.next();
    String fieldName = item.getFieldName();
    switch (fieldName) {
      case "service":
        service = item.getString();
        break;
      case "name":
        name = item.getString();
        break;
      case "privateKey":
        privateKey = item.getString();
        break;
      case "publicKey":
        publicKey = item.getString();
        break;
      default:
        // do nothing
    }
  }

  requiredNotNull(service, "Service name required");
  requiredNotNull(name, "Name required");
  if (privateKey == null && publicKey == null) {
    throw new BadRequestException("Key content was not provided.");
  }

  sshManager.createPair(
      new SshPairImpl(getCurrentUserId(), service, name, publicKey, privateKey));

  // We should send 200 response code and body with empty line
  // through specific of html form that doesn't invoke complete submit handler
  return Response.ok("", MediaType.TEXT_HTML).build();
}
 

/**
 * 处理上传内容
 * 
 * @param request
 * @param maxSize
 * @return
 */
@SuppressWarnings("unchecked")
private Map<String, Object> initFields(HttpServletRequest request) {

	// 存储表单字段和非表单字段
	Map<String, Object> map = new HashMap<String, Object>();

	// 第一步：判断request
	boolean isMultipart = ServletFileUpload.isMultipartContent(request);
	// 第二步：解析request
	if (isMultipart) {
		// Create a factory for disk-based file items
		DiskFileItemFactory factory = new DiskFileItemFactory();

		// 阀值,超过这个值才会写到临时目录,否则在内存中
		factory.setSizeThreshold(1024 * 1024 * 10);
		factory.setRepository(new File(tempPath));

		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);

		upload.setHeaderEncoding("UTF-8");

		// 最大上传限制
		upload.setSizeMax(maxSize);

		/* FileItem */
		List<FileItem> items = null;
		// Parse the request
		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 第3步：处理uploaded items
		if (items != null && items.size() > 0) {
			Iterator<FileItem> iter = items.iterator();
			// 文件域对象
			List<FileItem> list = new ArrayList<FileItem>();
			// 表单字段
			Map<String, String> fields = new HashMap<String, String>();
			while (iter.hasNext()) {
				FileItem item = iter.next();
				// 处理所有表单元素和文件域表单元素
				if (item.isFormField()) { // 表单元素
					String name = item.getFieldName();
					String value = item.getString();
					fields.put(name, value);
				} else { // 文件域表单元素
					list.add(item);
				}
			}
			map.put(FORM_FIELDS, fields);
			map.put(FILE_FIELDS, list);
		}
	}
	return map;
}
 

@RequestMapping("uploadAll.htm")
public ModelAndView uploadAll(HttpServletRequest request, HttpServletResponse response) throws Exception {
    User user = (User) request.getSession().getAttribute("user");

    String courseIntro = null, lessonNum = null, courseTitle = null, message = null, courseId = null;
    if (ServletFileUpload.isMultipartContent(request)) {
        DiskFileItemFactory disk = new DiskFileItemFactory();
        disk.setSizeThreshold(20 * 1024);
        disk.setRepository(disk.getRepository());
        ServletFileUpload up = new ServletFileUpload(disk);
        int maxsize = 1000 * 1024 * 1024;
        List list = up.parseRequest(request);
        Iterator i = list.iterator();
        String resourceUrl = "";
        String postfix = "";
        while (i.hasNext()) {
            FileItem fm = (FileItem) i.next();
            if (!fm.isFormField()) {

                String filePath = fm.getName();
                String fileName = "";
                int startIndex = filePath.lastIndexOf("\\");
                if (startIndex != -1) {
                    fileName = filePath.substring(startIndex + 1);
                } else {
                    fileName = filePath;
                }
                resourceUrl = fileName;

                if (fm.getSize() > maxsize) {
                    message = "文件太大，不超过1000M";
                    break;
                }
                String filepath = "D:\\GitHub\\TinyMooc\\src\\main\\webapp\\resource\\video";
                postfix = resourceUrl.substring(resourceUrl.lastIndexOf(".") + 1, resourceUrl.length());
                File uploadPath = new File(filepath);
                File saveFile = new File(uploadPath, fileName);
                fm.write(saveFile);
                message = "文件上传成功！";
            } else {
                String formName = fm.getFieldName();
                String con = fm.getString("utf-8");
                if (formName.equals("courseIntro")) {
                    courseIntro = con;
                } else if (formName.equals("lessonNum")) {
                    lessonNum = con;
                } else if (formName.equals("courseTitle")) {
                    courseTitle = con;
                } else if (formName.equals("courseId")) {
                    courseId = con;
                }
            }
        }
        Course course = new Course();
        course.setCourseId(UUIDGenerator.randomUUID());
        course.setApplyDate(new Date());
        course.setCourse(uploadService.findById(Course.class, courseId));
        course.setCourseIntro(courseIntro);
        course.setCourseState("申请中");
        course.setCourseTitle(courseTitle);
        course.setLessonNum(Integer.parseInt(lessonNum));
        course.setScanNum(0);
        uploadService.save(course);

        UserCourse uC = new UserCourse();
        uC.setCourse(course);
        uC.setUserCourseId(UUIDGenerator.randomUUID());
        uC.setUserPosition("创建者");
        uC.setUser(user);
        uploadService.save(uC);

        Resource resource = new Resource();
        resource.setResourceId(UUIDGenerator.randomUUID());
        resource.setResourceObject(course.getCourseId());
        resource.setType("video");
        uploadService.save(resource);

        Video video = new Video();

        video.setResourceId(resource.getResourceId());
        video.setResource(resource);
        video.setVideoUrl(resourceUrl);

        uploadService.save(video);
        return new ModelAndView("redirect:courseDetailPage.htm?courseId=" + courseId);

    }
    return new ModelAndView("redirect:courseDetailPage.htm?courseId=" + courseId);
}
 

public static final HashMap UploadFile(HttpServletRequest request, HttpServletResponse response, String filepaths) throws Exception {
    HashMap params = new HashMap();
    String pathType = "images";
    if (!(filepaths.equals("")))
        pathType = filepaths;
    String readPath = "";
    String contextPath = "";
    if ((readPath == null) || (readPath.equals("")))
        readPath = request.getSession().getServletContext().getRealPath("");

    if ((contextPath == null) || (contextPath.equals("")))
        contextPath = request.getContextPath();

    String savePhotoPath = mkdirFile(readPath, pathType, true);
    if (ServletFileUpload.isMultipartContent(request)) {
        DiskFileItemFactory dff = new DiskFileItemFactory();
        dff.setSizeThreshold(1024000);
        ServletFileUpload sfu = new ServletFileUpload(dff);
        List fileItems = sfu.parseRequest(request);
        sfu.setFileSizeMax(5000000L);
        sfu.setSizeMax(10000000L);
        sfu.setHeaderEncoding("UTF-8");
        Iterator iter = fileItems.iterator();

        while (iter.hasNext()) {
            FileItem item = (FileItem) iter.next();
            if (item.isFormField()) {
                String name = item.getFieldName();
                String value = new String(item.getString().getBytes(
                        "ISO8859-1"), "utf-8");
                params.put(name, value);
            } else if ((item.getSize() > 0L) &&
                    (item.getName() != null)) {
                File fullFile = new File(item.getName());
                File fileOnServer = new File(savePhotoPath,
                        fullFile.getName());
                item.write(fileOnServer);
                String fileName2 = fileOnServer.getName();
                String fileType = fileName2.substring(fileName2
                        .lastIndexOf("."));
                String filepath = savePhotoPath + "/" +
                        new Date().getTime() + fileType;
                File newFile = new File(filepath);
                fileOnServer.renameTo(newFile);
                String returnString = filepath.substring(readPath
                        .length());
                params.put(item.getFieldName(), request.getRequestURL().toString().replace(request.getRequestURI(), "") + contextPath +
                        returnString);
            }
        }
    }

    return params;
}
 

/**
	 * 处理上传内容
	 * 
	 * @param request
	 * @param maxSize
	 * @return
	 */
//	@SuppressWarnings("unchecked")
	private Map<String, Object> initFields(HttpServletRequest request) {

		// 存储表单字段和非表单字段
		Map<String, Object> map = new HashMap<String, Object>();

		// 第一步：判断request
		boolean isMultipart = ServletFileUpload.isMultipartContent(request);
		// 第二步：解析request
		if (isMultipart) {
			// Create a factory for disk-based file items
			DiskFileItemFactory factory = new DiskFileItemFactory();

			// 阀值,超过这个值才会写到临时目录,否则在内存中
			factory.setSizeThreshold(1024 * 1024 * 10);
			factory.setRepository(new File(tempPath));

			// Create a new file upload handler
			ServletFileUpload upload = new ServletFileUpload(factory);

			upload.setHeaderEncoding("UTF-8");

			// 最大上传限制
			upload.setSizeMax(maxSize);

			/* FileItem */
			List<FileItem> items = null;
			// Parse the request
			try {
				items = upload.parseRequest(request);
			} catch (FileUploadException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			// 第3步：处理uploaded items
			if (items != null && items.size() > 0) {
				Iterator<FileItem> iter = items.iterator();
				// 文件域对象
				List<FileItem> list = new ArrayList<FileItem>();
				// 表单字段
				Map<String, String> fields = new HashMap<String, String>();
				while (iter.hasNext()) {
					FileItem item = iter.next();
					// 处理所有表单元素和文件域表单元素
					if (item.isFormField()) { // 表单元素
						String name = item.getFieldName();
						String value = item.getString();
						fields.put(name, value);
					} else { // 文件域表单元素
						list.add(item);
					}
				}
				map.put(FORM_FIELDS, fields);
				map.put(FILE_FIELDS, list);
			}
		}
		return map;
	}
 

/**
 * 处理上传内容
 * 
 * @param request
 * @param maxSize
 * @return
 */
@SuppressWarnings("unchecked")
private Map<String, Object> initFields(HttpServletRequest request) {

	// 存储表单字段和非表单字段
	Map<String, Object> map = new HashMap<String, Object>();

	// 第一步：判断request
	boolean isMultipart = ServletFileUpload.isMultipartContent(request);
	// 第二步：解析request
	if (isMultipart) {
		// Create a factory for disk-based file items
		DiskFileItemFactory factory = new DiskFileItemFactory();

		// 阀值,超过这个值才会写到临时目录,否则在内存中
		factory.setSizeThreshold(1024 * 1024 * 10);
		factory.setRepository(new File(tempPath));

		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);

		upload.setHeaderEncoding("UTF-8");

		// 最大上传限制
		upload.setSizeMax(maxSize);

		/* FileItem */
		List<FileItem> items = null;
		// Parse the request
		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 第3步：处理uploaded items
		if (items != null && items.size() > 0) {
			Iterator<FileItem> iter = items.iterator();
			// 文件域对象
			List<FileItem> list = new ArrayList<FileItem>();
			// 表单字段
			Map<String, String> fields = new HashMap<String, String>();
			while (iter.hasNext()) {
				FileItem item = iter.next();
				// 处理所有表单元素和文件域表单元素
				if (item.isFormField()) { // 表单元素
					String name = item.getFieldName();
					String value = item.getString();
					fields.put(name, value);
				} else { // 文件域表单元素
					list.add(item);
				}
			}
			map.put(FORM_FIELDS, fields);
			map.put(FILE_FIELDS, list);
		}
	}
	return map;
}
 

/**
 * 创建 multipart 请求参数列表
 */
public static List<Object> createMultipartParamList(HttpServletRequest request) throws Exception {
    // 定义参数列表
    List<Object> paramList = new ArrayList<Object>();
    // 创建两个对象，分别对应 普通字段 与 文件字段
    Map<String, Object> fieldMap = new HashMap<String, Object>();
    List<Multipart> multipartList = new ArrayList<Multipart>();
    // 获取并遍历表单项
    List<FileItem> fileItemList;
    try {
        fileItemList = fileUpload.parseRequest(request);
    } catch (FileUploadBase.FileSizeLimitExceededException e) {
        // 异常转换（抛出自定义异常）
        throw new UploadException(e);
    }
    for (FileItem fileItem : fileItemList) {
        // 分两种情况处理表单项
        String fieldName = fileItem.getFieldName();
        if (fileItem.isFormField()) {
            // 处理普通字段
            String fieldValue = fileItem.getString(FrameworkConstant.UTF_8);
            fieldMap.put(fieldName, fieldValue);
        } else {
            // 处理文件字段
            String fileName = FileUtil.getRealFileName(fileItem.getName());
            if (StringUtil.isNotEmpty(fileName)) {
                long fileSize = fileItem.getSize();
                String contentType = fileItem.getContentType();
                InputStream inputSteam = fileItem.getInputStream();
                // 创建 Multipart 对象，并将其添加到 multipartList 中
                Multipart multipart = new Multipart(fieldName, fileName, fileSize, contentType, inputSteam);
                multipartList.add(multipart);
            }
        }
    }
    // 初始化参数列表
    paramList.add(new Params(fieldMap));
    paramList.add(new Multiparts(multipartList));
    // 返回参数列表
    return paramList;
}