下面列出了javax.servlet.http.Part#getSize() 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* 用于上传照片
* @param obj 照片的所有者，比如一个user或room
* @name uploadPhoto
* @notice none
* @author <a href="mailto:[email protected]">黄钰朝</a>
* @date 2019/4/20
*/
public static void uploadPhoto(HttpServletRequest req, Object obj) {
String photo = null;
try {
Part part = req.getPart("photo");
if (part == null) {
photo="default.jpg";
} else if (part.getSize() > 0) {
photo = upload(part);
}
} catch (IOException | ServletException |
NullPointerException e) {
e.printStackTrace();
throw new ServiceException("无法上传照片" + e);
}
if (obj instanceof User) {
User user = (User) obj;
user.setPhoto(photo);
}
if (obj instanceof Room) {
Room room = (Room) obj;
room.setPhoto(photo);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Part image = request.getPart("foodPhoto");
InputStream imageInputStream = null;
if (image.getSize() != 0)
imageInputStream = image.getInputStream();
SellerService service = new SellerServiceImpl();
boolean success = service.addFood(request, imageInputStream);
if (success) {
response.sendRedirect(request.getContextPath() + "/pages/profiles/seller_behind.jsp");
} else {
response.getWriter().print("添加失败！请稍后再试...");
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Part image = request.getPart("image");
InputStream imageInputStream = null;
if(image.getSize() != 0)
imageInputStream = image.getInputStream();
SellerService service = new SellerServiceImpl();
boolean success = service.modifyFoodInfo(request, imageInputStream);
if(success){
response.sendRedirect(request.getContextPath() + "/pages/profiles/seller_behind.jsp");
}else{
response.setCharacterEncoding("utf-8");
response.getWriter().print("修改失败！请稍后再试...");
}
}
@SuppressWarnings("unchecked")
private <T> T parse(Class<T> type) throws IOException, ServletException
{
T providedObject;
final ObjectMapper mapper = new ObjectMapper();
if (_headers.containsKey("Content-Type") && _request.getHeader("Content-Type")
.startsWith("multipart/form-data"))
{
Map<String, Object> items = new LinkedHashMap<>();
Map<String, String> fileUploads = new HashMap<>();
Collection<Part> parts = _request.getParts();
for (Part part : parts)
{
if ("data".equals(part.getName()) && "application/json".equals(part.getContentType()))
{
items = mapper.readValue(part.getInputStream(), LinkedHashMap.class);
}
else
{
byte[] data = new byte[(int) part.getSize()];
try (InputStream inputStream = part.getInputStream())
{
inputStream.read(data);
}
fileUploads.put(part.getName(), DataUrlUtils.getDataUrlForBytes(data));
}
}
items.putAll(fileUploads);
providedObject = (T) items;
}
else
{
providedObject = mapper.readValue(_request.getInputStream(), type);
}
return providedObject;
}
HttpUploadReader(Part part, Map<String, String> map) throws IOException {
this.part = part;
name = part.getName();
fileName = part.getSubmittedFileName();
contentType = part.getContentType();
size = part.getSize();
inputStream = part.getInputStream();
this.map = map;
}
@Override
public void upload(HttpServletRequest request, HttpServletResponse response, String uploader) {
cors.set(request, response);
if (cors.is(request, response))
return;
try {
OutputStream outputStream = serviceHelper.setContext(request, response, uploader);
List<UploadReader> readers = new ArrayList<>();
Map<String, String> map = new HashMap<>();
request.getParameterMap().forEach((name, value) -> map.put(name, converter.toString(value)));
for (Part part : request.getParts())
if (!map.containsKey(part.getName()) && !validator.isEmpty(part.getSubmittedFileName()) && part.getSize() <= maxFileSize)
readers.add(new HttpUploadReader(part, map));
if (readers.isEmpty())
return;
response.setCharacterEncoding(context.getCharset(null));
outputStream.write(uploaders.get(uploader).upload(readers));
outputStream.flush();
outputStream.close();
} catch (Throwable e) {
logger.warn(e, "处理文件上传时发生异常！");
} finally {
closables.close();
}
}
public PartContentStream(Part part ) {
this.part = part;
contentType = part.getContentType();
name = part.getName();
sourceInfo = part.getSubmittedFileName();
size = part.getSize();
}
public static boolean isEmpty(Part file) {
if(file==null){
return true;
}
return !(file.getSize()>0);
}
@Override
public ActionResult execute() {
try {
Part image = req.getPart("studentprofilephoto");
if (image == null) {
throw new InvalidHttpRequestBodyException(Const.StatusMessages.STUDENT_PROFILE_NO_PICTURE_GIVEN);
}
if (image.getSize() > Const.SystemParams.MAX_PROFILE_PIC_SIZE) {
throw new InvalidHttpRequestBodyException(Const.StatusMessages.STUDENT_PROFILE_PIC_TOO_LARGE);
}
if (!image.getContentType().startsWith("image/")) {
throw new InvalidHttpRequestBodyException(Const.StatusMessages.STUDENT_PROFILE_NOT_A_PICTURE);
}
byte[] imageData = new byte[(int) image.getSize()];
try (InputStream is = image.getInputStream()) {
is.read(imageData);
}
String pictureKey = GoogleCloudStorageHelper.writeImageDataToGcs(userInfo.id, imageData, image.getContentType());
logic.updateOrCreateStudentProfile(
StudentProfileAttributes.updateOptionsBuilder(userInfo.id)
.withPictureKey(pictureKey)
.build());
StudentProfilePictureResults dataFormat =
new StudentProfilePictureResults(pictureKey);
return new JsonResult(dataFormat);
} catch (InvalidParametersException ipe) {
throw new InvalidHttpRequestBodyException(ipe.getMessage(), ipe);
} catch (ServletException | IOException e) {
return new JsonResult(e.getMessage(), HttpStatus.SC_INTERNAL_SERVER_ERROR);
}
}
@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setStatus(HttpServletResponse.SC_OK);
request.setAttribute(Request.MULTIPART_CONFIG_ELEMENT, MULTI_PART_CONFIG);
StringBuilder content = new StringBuilder();
for (Part part : request.getParts()) {
if (part.getName().equalsIgnoreCase("upload")) {
byte[] buffer = new byte[(int) part.getSize()];
try (InputStream in = part.getInputStream()) {
in.read(buffer, 0, (int) part.getSize());
content.append(new String(buffer, StandardCharsets.UTF_8));
}
}
}
// Slow down the upload so we can verify WebDriver waits.
try {
Thread.sleep(2500);
} catch (InterruptedException ignored) {
}
response.getWriter().write(content.toString());
response.getWriter().write(
"<script>window.top.window.onUploadDone();</script>");
response.setStatus(HttpServletResponse.SC_OK);
}
@Override
public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
Part part = (Part) value;
if(part.getSize()>1024){
throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "file is too large", "file is too large"));
}
}
/**
* 上传多个图片
*
* @param request
* @return
*/
public boolean uploadImages(HttpServletRequest request) {
boolean success = false;
int count = -1;
ArrayList<Part> images;
try {
images = (ArrayList<Part>) request.getParts();
count = images.size();
for (Part image : images) {
System.out.println(image.getName());
InputStream imageInputStream = null;
if (image != null && image.getSize() != 0) {
try {
imageInputStream = image.getInputStream();
if (imageInputStream != null) {
String imagedir = request.getServletContext()
.getInitParameter("imagedir")
+ File.separator
+ "avatars"
+ File.separator;
// 图片名格式：20161123204206613375.jpg。
// 代表 2016-11-23 20:42:06.613 + 3 位 0 - 9 间随机数字
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmssSSS");
StringBuilder imageName = new StringBuilder(
dateFormat.format(new Date()));
Random random = new Random();
for (int i = 0; i < 3; ++i) {
imageName.append(random.nextInt(10));
}
imageName.append(".jpg");
String targetFile = imagedir + imageName;
System.out.println(targetFile);
try {
FileUtils.copyInputStreamToFile(imageInputStream,
new File(targetFile));
count--;
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (IOException e1) {
e1.printStackTrace();
} finally {
imageInputStream.close();
}
}
}
} catch (IOException | ServletException e3) {
e3.printStackTrace();
}
if (count == 0) {
success = true;
} else {
success = false;
}
return success;
}
public boolean addGoodsImage(HttpServletRequest request, int goodsId) {
boolean flag = false;
int count = -1;
ArrayList<Part> images;
try {
images = (ArrayList<Part>) request.getParts();
count = images.size();
for (Part image : images) {
if (image.getContentType() == null) {
continue;
}
// System.out.println(image.getContentType());
InputStream imageInputStream = null;
if (image != null && image.getSize() != 0) {
try {
imageInputStream = image.getInputStream();
if (imageInputStream != null) {
String imagedir = request.getServletContext()
.getInitParameter("imagedir")
+ File.separator;
// 图片名格式：20161123204206613375.jpg。
// 代表 2016-11-23 20:42:06.613 + 3 位 0 - 9 间随机数字
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmssSSS");
StringBuilder imageName = new StringBuilder(
dateFormat.format(new Date()));
Random random = new Random();
for (int i = 0; i < 3; ++i) {
imageName.append(random.nextInt(10));
}
imageName.append(".jpg");
String targetFile = imagedir + imageName;
try {
FileUtils.copyInputStreamToFile(imageInputStream,
new File(targetFile));
count--;
dao.addGoodsImage("/images/goods/" + imageName, goodsId); // 更新数据库
// System.out.println(imagedir);
// System.out.println(imageName);
// System.out.println(count);
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (IOException e1) {
e1.printStackTrace();
} finally {
imageInputStream.close();
}
}
}
} catch (IOException | ServletException e3) {
e3.printStackTrace();
}
if (count == 0) {
flag = true;
} else {
flag = false;
}
return flag;
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
// gets absolute path of the web application
String applicationPath = request.getServletContext().getRealPath("");
// constructs path of the directory to save uploaded file
String uploadFilePath = applicationPath + File.separator + UPLOAD_DIR;
// creates upload folder if it does not exists
File uploadFolder = new File(uploadFilePath);
if (!uploadFolder.exists()) {
uploadFolder.mkdirs();
}
PrintWriter writer = response.getWriter();
// write all files in upload folder
for (Part part : request.getParts()) {
if (part != null && part.getSize() > 0) {
String fileName = part.getSubmittedFileName();
String contentType = part.getContentType();
// allows only JPEG files to be uploaded
if (!contentType.equalsIgnoreCase("image/jpeg")) {
continue;
}
part.write(uploadFilePath + File.separator + fileName);
writer.append("File successfully uploaded to "
+ uploadFolder.getAbsolutePath()
+ File.separator
+ fileName
+ "<br>\r\n");
}
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
InputStream is = null;
OutputStream os = null;
try {
Part part = null;
try {
part = request.getPart("file");
} catch (Exception e) {
}
String contentType = null;
int contentLength = -1;
if (part == null) {
is = request.getInputStream();
contentType = request.getContentType();
contentLength = request.getContentLength();
} else {
is = part.getInputStream();
contentType = part.getContentType();
contentLength = (int) part.getSize();
}
response.addHeader("Access-Control-Allow-Origin", "*");
if (contentType != null) {
response.setContentType(contentType);
}
if (contentLength > 0) {
response.setContentLength(contentLength);
}
os = response.getOutputStream();
byte data[] = new byte[4096];
int len = 0;
while ((len = is.read(data, 0, data.length)) > 0) {
os.write(data, 0, len);
}
os.flush();
} finally {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PageStats.page(request);
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
LoginBean loginBean = (LoginBean)request.getSession().getAttribute("loginBean");
if (loginBean == null) {
response.sendRedirect("index.jsp");
return;
}
BotBean botBean = loginBean.getBotBean();
MemoryBean bean = loginBean.getBean(MemoryBean.class);
try {
String postToken = (String)request.getParameter("postToken");
loginBean.verifyPostToken(postToken);
String instance = (String)request.getParameter("instance");
if (instance != null) {
if (botBean.getInstance() == null || !String.valueOf(botBean.getInstanceId()).equals(instance)) {
botBean.validateInstance(instance);
}
}
if (!botBean.isConnected()) {
request.getRequestDispatcher("memory.jsp").forward(request, response);
return;
}
botBean.checkAdmin();
String importFormat = (String)request.getParameter("import-format");
String encoding = (String)request.getParameter("import-encoding");
String pin = (String)request.getParameter("pin");
Part filePart = request.getPart("file");
if ((filePart != null) && (filePart.getSize() > 0)) {
if (filePart.getContentType() != null && filePart.getContentType().equals("csv")) {
importFormat = "csv";
}
String fileName = getFileName(filePart);
InputStream stream = filePart.getInputStream();
bean.importFile(fileName, stream, importFormat, encoding, "on".equals(pin));
} else {
throw new BotException("Missing file");
}
request.getRequestDispatcher("memory.jsp").forward(request, response);
} catch (Exception failed) {
botBean.error(failed);
request.getRequestDispatcher("memory.jsp").forward(request, response);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("application/json");
/* 1. read parameter */
String uid = (String) request.getSession().getAttribute("usreId");
Part image = request.getPart("image");
/* 2. invoke service */
InputStream imageIS = null;
if (image != null && image.getSize() != 0)
imageIS = image.getInputStream();
String newAvatarAddr = UserService.updateAvatar(uid, request.getServletContext(), imageIS);
/* 3. set session */
request.getSession().setAttribute("userAvatarAddr", newAvatarAddr);
/* 4. return JSON */
Gson gson = new Gson();
JsonObject result = new JsonObject();
result.addProperty("avatar", newAvatarAddr);
}