一、文件上传

public UploadResult upload(MultipartFile file) {Assert.notNull(file, "Multipart file must not be null");// Get current time  获取当前时间Calendar current = Calendar.getInstance(optionService.getLocale());// Get month and day of month  获取当前年和月int year = current.get(Calendar.YEAR);int month = current.get(Calendar.MONTH) + 1;String monthString = month < 10 ? "0" + month : String.valueOf(month);// Build directory   构建上传文件存储目录String subDir = UPLOAD_SUB_DIR + year + FILE_SEPARATOR + monthString + FILE_SEPARATOR;//获取上传文件名String originalBasename = FilenameUtils.getBasename(Objects.requireNonNull(file.getOriginalFilename()));// Get basename  构建文件名String basename = originalBasename + '-' + HaloUtils.randomUUIDWithoutDash();// Get extension  构建文件类型String extension = FilenameUtils.getExtension(file.getOriginalFilename());log.debug("Base name: [{}], extension: [{}] of original filename: [{}]", basename, extension, file.getOriginalFilename());// Build sub file path  构建子文件路径String subFilePath = subDir + basename + '.' + extension;// Get upload path  构建上传文件存储目录路径Path uploadPath = Paths.get(workDir, subFilePath);log.info("Uploading file: [{}]to directory: [{}]", file.getOriginalFilename(), uploadPath.toString());try {// TODO Synchronize here// Create directory   创建目录，创建文件Files.createDirectories(uploadPath.getParent());Files.createFile(uploadPath);   // Upload this file   上传文件file.transferTo(uploadPath);// Build upload result   构建上传结果UploadResult uploadResult = new UploadResult();uploadResult.setFilename(originalBasename);uploadResult.setFilePath(subFilePath);uploadResult.setKey(subFilePath);uploadResult.setSuffix(extension);uploadResult.setMediaType(MediaType.valueOf(Objects.requireNonNull(file.getContentType())));uploadResult.setSize(file.getSize());// TODO refactor this: if image is svg ext. extensionboolean isSvg = "svg".equals(extension);// Check file type  检查文件类型if (FileHandler.isImageType(uploadResult.getMediaType()) && !isSvg) {lock.lock();try (InputStream uploadFileInputStream = new FileInputStream(uploadPath.toFile())) {// Upload a thumbnail   上传压缩图String thumbnailBasename = basename + THUMBNAIL_SUFFIX;String thumbnailSubFilePath = subDir + thumbnailBasename + '.' + extension;Path thumbnailPath = Paths.get(workDir + thumbnailSubFilePath);// Read as image   解读为图像BufferedImage originalImage = ImageUtils.getImageFromFile(uploadFileInputStream, extension);// Set width and heightuploadResult.setWidth(originalImage.getWidth());uploadResult.setHeight(originalImage.getHeight());// Generate thumbnail    生成缩略图boolean result = generateThumbnail(originalImage, thumbnailPath, extension);if (result) {// Set thumb path   设置缩略图路径uploadResult.setThumbPath(thumbnailSubFilePath);} else {// If generate erroruploadResult.setThumbPath(subFilePath);}} finally {lock.unlock();}} else {uploadResult.setThumbPath(subFilePath);}log.info("Uploaded file: [{}] to directory: [{}] successfully", file.getOriginalFilename(), uploadPath.toString());return uploadResult;} catch (IOException e) {throw new FileOperationException("上传附件失败").setErrorData(uploadPath);}}

//获取文件名  例如: houtai2.jpg  -->   houtai2
@NonNull
public static String getBasename(@NonNull String filename) {Assert.hasText(filename, "Filename must not be blank");// Find the last slashint separatorLastIndex = StringUtils.lastIndexOf(filename, File.separatorChar);if (separatorLastIndex == filename.length() - 1) {return StringUtils.EMPTY;}if (separatorLastIndex >= 0 && separatorLastIndex < filename.length() - 1) {filename = filename.substring(separatorLastIndex + 1);}// Find last dotint dotLastIndex = StringUtils.lastIndexOf(filename, '.');if (dotLastIndex < 0) {return filename;}return filename.substring(0, dotLastIndex);}

@NonNull    //  构建文件的类型  例如： houtai2.jpg  -- > jpg
public static String getExtension(@NonNull String filename) {Assert.hasText(filename, "Filename must not be blank");// Find the last slashint separatorLastIndex = StringUtils.lastIndexOf(filename, File.separatorChar);if (separatorLastIndex == filename.length() - 1) {return StringUtils.EMPTY;}if (separatorLastIndex >= 0 && separatorLastIndex < filename.length() - 1) {filename = filename.substring(separatorLastIndex + 1);}// Find last dotint dotLastIndex = StringUtils.lastIndexOf(filename, '.');if (dotLastIndex < 0) {return StringUtils.EMPTY;}return filename.substring(dotLastIndex + 1);}

//返回图像数据缓存区
public static BufferedImage getImageFromFile(InputStream is, String extension) throws IOException {log.debug("Current File type is : [{}]", extension);if (EXTENSION_ICO.equals(extension)) {return ICODecoder.read(is).get(0);} else {return ImageIO.read(is);}}

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一、文件上传

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