@ResponseBody  @RequestMapping(value = "/upload.do", method = RequestMethod.POST)  public String upload(String fileName, MultipartFile jarFile) {      // 下面是测试代码      System.out.println(fileName);      String originalFilename = jarFile.getOriginalFilename();      System.out.println(originalFilename);      try {          String string = new String(jarFile.getBytes(), "UTF-8");          System.out.println(string);      } catch (UnsupportedEncodingException e) {          e.printStackTrace();      } catch (IOException e) {          e.printStackTrace();      }      // TODO 处理文件内容...      return "OK";  }

@Test  public void testUpload() throws Exception {      String url = "http://127.0.0.1:8080/test/upload.do";      String filePath = "C:\\Users\\MikanMu\\Desktop\\test.txt";        RestTemplate rest = new RestTemplate();      FileSystemResource resource = new FileSystemResource(new File(filePath));      MultiValueMap
     
       param = new LinkedMultiValueMap<>();      param.add("jarFile", resource);      param.add("fileName", "test.txt");        String string = rest.postForObject(url, param, String.class);      System.out.println(string);  }
     

String string = rest.postForObject(url, param, String.class);  可以换成以下方式HttpEntity
     
      
       > httpEntity = new HttpEntity
       
        
         >(param);  ResponseEntity
         
           responseEntity = rest.exchange(url, HttpMethod.POST, httpEntity, String.class);  System.out.println(responseEntity.getBody());
         
        
       
      
     

 

@PostMapping(value = "/uploadFile")    @ResponseBody    @ApiOperation(value = "上传附件", notes = "返回结果,SUCCESS:200,FAILED:500", httpMethod = "POST")    public String upload(@ApiParam MultipartFile importFile) throws Exception {        String suffix = importFile.getOriginalFilename().substring(importFile.getOriginalFilename().lastIndexOf("."));        String showUrl = aLiYunOssService.upload(importFile.getBytes(), suffix);        return showUrl;    }

 

MultiValueMap
     
       parts = new LinkedMultiValueMap
      
       ();ByteArrayResource arrayResource = new ByteArrayResource(getBytes(),"test.jpg");  parts.add("importFile", arrayResource); HttpEntity
       
        
         > httpEntity2 = new HttpEntity
         
          
           >(parts); ResponseEntity
           
             responseEntity2 = rest.exchange(url, HttpMethod.POST, httpEntity2, String.class); System.out.println("返回地址1==="+responseEntity2.getBody());