通过resttemplate在spring rest服务上发送文件

Question

我有一个rest服务，接受正常参数和文件形式的多部分。

我想用resttemplate将数据和文件发送到上面的rest服务。

在我发送正常字符串数据之前，没有任何问题。一旦我添加了发送字节的代码，然后我开始得到400个坏的请求错误。

@RestController
@RequestMapping(value="/ticket")
public class UserTicketController {

 @RequestMapping(value="/createTicket.do",method={RequestMethod.POST},
        consumes = {MediaType.MULTIPART_FORM_DATA_VALUE},headers={"content-type="+MediaType.MULTIPART_FORM_DATA_VALUE})
public void createTicket(@ModelAttribute ServiceDeskRequest serviceDeskRequest, HttpServletRequest request,HttpServletResponse response) throws Exception{

 }

 }

 public class ServiceDeskRequest implements Serializable{


private String jsonData;
private MultipartFile attachment;
}

 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
</bean> 

客户端代码

RestTemplate restTemplate = new RestTemplate();
        MultiValueMap<String, Object> requestParamerterMap = new LinkedMultiValueMap<String, Object>();

        requestParamerterMap.add("jsonData", jsonData);
        MultipartFile attachment = userRequest.getAttachment();

        if(attachment!=null && attachment.getOriginalFilename()!=null) {
            ByteArrayResource byteArrayResource = new ByteArrayResource(attachment.getBytes(), attachment.getOriginalFilename());
            requestParamerterMap.add("attachment", byteArrayResource);
        }

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);

        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<MultiValueMap<String, Object>>(requestParamerterMap, headers);


        String response = restTemplate.postForObject(targetUrl, requestEntity, String.class);

Answer 1

我想出来了。这个拼图有两块。服务代码没有更改。

>

提供RestTemplate的右转换器。在默认转换列表中，spring没有添加FormHttpMessageConverter。

    FormHttpMessageConverter converter = new FormHttpMessageConverter();

    RestTemplate restTemplate = new RestTemplate();
    restTemplate.getMessageConverters().add(converter);

正在重写bytearrayresource类。请注意，您需要重写getFilename方法，以便在服务端接收文档名。

     public class MultipartByteArrayResource extends ByteArrayResource{

     private String fileName;

      public MultipartByteArrayResource(byte[] byteArray) {
             super(byteArray);
         }

      public String getFilename() { 
          return fileName; 
        }

      public void setFilename(String fileName) {
          this.fileName= fileName;
       }

   }

       FormHttpMessageConverter converter = new FormHttpMessageConverter();

        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getMessageConverters().add(converter);

        MultiValueMap<String, Object> requestParamerterMap = new LinkedMultiValueMap<String, Object>();

        requestParamerterMap.add("jsonData", jsonData);

        MultipartFile attachment = userRequest.getAttachment();

        if(attachment!=null && attachment.getOriginalFilename()!=null) {
            //ByteArrayResource byteArrayResource = new ByteArrayResource(attachment.getBytes(), attachment.getOriginalFilename());

            MultipartByteArrayResource resource = new MultipartByteArrayResource(attachment.getBytes());

           //pass file name sepratly 
           resource.setFilename(attachment.getOriginalFilename());

            requestParamerterMap.add("attachment", resource);
        }

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);

        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<MultiValueMap<String, Object>>(requestParamerterMap, headers);

        String response = restTemplate.postForObject(targetUrls.get("sdCreateTicketsUrl"), requestEntity, String.class);