RESTful文件上传与下载

文件上传

    @Test
    public void whenUploadSuccess() {
        try {
            String file = mockMvc.perform(MockMvcRequestBuilders.fileUpload("/file")
                    .file(new MockMultipartFile("file", "test.txt",
                            "multipart/form-data", "hello upload".getBytes("UTF-8"))))
                    .andExpect(MockMvcResultMatchers.status().isOk())
                    .andReturn().getResponse().getContentAsString();
            log.info("file:{}",file);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @PostMapping
    public FileInfo upload(MultipartFile file) {
        log.info(file.getName());
        log.info(file.getOriginalFilename());
        log.info(String.valueOf(file.getSize()));
        File localFile = new File(folder, new Date().getTime() + ".txt");
        try {
            file.transferTo(localFile);
            return new FileInfo(localFile.getAbsolutePath());
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

    }

文件下载

    @GetMapping("/{id}")
    public void download(@PathVariable String id, HttpServletRequest request, HttpServletResponse response) {
        try (InputStream ips = new FileInputStream(new File(folder, id + ".txt"));
             OutputStream ops = response.getOutputStream();) {
            response.setContentType("application/x-download");
            response.setHeader("Content-Disposition", "attachment;filename=test.txt");
            IOUtils.copy(ips, ops);
            ops.flush();
        }catch (IOException e){
            e.printStackTrace();
        }
    }