时间:2021-05-19
一、pom文件依赖的添加
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> </dependencies>二、controller层
@Controllerpublic class FileUploadController { private final StorageService storageService; @Autowired public FileUploadController(StorageService storageService) { this.storageService = storageService; } //展示上传过的文件 @GetMapping("/") public String listUploadedFiles(Model model) throws IOException { model.addAttribute("files", storageService.loadAll().map(path -> MvcUriComponentsBuilder.fromMethodName(FileUploadController.class, "serveFile", path.getFileName().toString()) .build().toString()) .collect(Collectors.toList())); return "uploadForm"; } //下载选定的上传的文件 @GetMapping("/files/{filename:.+}") @ResponseBody public ResponseEntity<Resource> serveFile(@PathVariable String filename) { Resource file = storageService.loadAsResource(filename); return ResponseEntity .ok() .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\""+file.getFilename()+"\"") .body(file); } //上传文件 @PostMapping("/") public String handleFileUpload(@RequestParam("file") MultipartFile file, RedirectAttributes redirectAttributes) { storageService.store(file); redirectAttributes.addFlashAttribute("message", "You successfully uploaded " + file.getOriginalFilename() + "!"); return "redirect:/"; } @ExceptionHandler(StorageFileNotFoundException.class) public ResponseEntity<?> handleStorageFileNotFound(StorageFileNotFoundException exc) { return ResponseEntity.notFound().build(); }}三、实现的service层
@Servicepublic class FileSystemStorageService implements StorageService { private final Path rootLocation; @Autowired public FileSystemStorageService(StorageProperties properties) { this.rootLocation = Paths.get(properties.getLocation()); } @Override public void store(MultipartFile file) { try { if (file.isEmpty()) { throw new StorageException("Failed to store empty file " + file.getOriginalFilename()); } Files.copy(file.getInputStream(), this.rootLocation.resolve(file.getOriginalFilename())); } catch (IOException e) { throw new StorageException("Failed to store file " + file.getOriginalFilename(), e); } } @Override public Stream<Path> loadAll() { try { return Files.walk(this.rootLocation, 1) .filter(path -> !path.equals(this.rootLocation)) .map(path -> this.rootLocation.relativize(path)); } catch (IOException e) { throw new StorageException("Failed to read stored files", e); } } @Override public Path load(String filename) { return rootLocation.resolve(filename); } @Override public Resource loadAsResource(String filename) { try { Path file = load(filename); Resource resource = new UrlResource(file.toUri()); if(resource.exists() || resource.isReadable()) { return resource; } else { throw new StorageFileNotFoundException("Could not read file: " + filename); } } catch (MalformedURLException e) { throw new StorageFileNotFoundException("Could not read file: " + filename, e); } } @Override public void deleteAll() { FileSystemUtils.deleteRecursively(rootLocation.toFile()); } @Override public void init() { try { Files.createDirectory(rootLocation); } catch (IOException e) { throw new StorageException("Could not initialize storage", e); } }}四、在application.properties文件上配置上传的属性
spring.http.multipart.max-file-size=128KB
spring.http.multipart.max-request-size=128KB
五、服务启动时的处理
六、测试成功的结果
以上这篇基于SpringBoot上传任意文件功能的实现就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。
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