How to solve the error "No serializer found for class java.io.ByteArrayInputStream " when passing MultipartFile using RestTemplate?

huangapple
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英文:

How to solve the error "No serializer found for class java.io.ByteArrayInputStream " when passing MultipartFile using RestTemplate?

问题

我正试图从我的应用程序传递一个Spring MultipartFile到一个微服务，并使用RestTemplate，如下所示，

  1. HttpHeaders headers = new HttpHeaders();
  2. headers.setContentType(MediaType.MULTIPART_FORM_DATA);
  4. MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
  5. body.add("circularAttachment", souqBean.getCircularAttachment()); // MultipartFile
  6. body.add("circularEntryId", souqBean.getCircularEntryId());
  7. body.add("circularTitle", souqBean.getCircularTitle());
  9. HttpEntity<?> entity = new HttpEntity<MultiValueMap<String, Object>>(body, headers);
  11. ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
  12. status = response.getBody();

更多信息，请参考getCircularAttachment()方法：

  1. public MultipartFile getCircularAttachment() {
  2.     return circularAttachment;
  3. }

其中，MultipartFile是Spring中的一个类：org.springframework.web.multipart.MultipartFile

但是在这一行，

  1. ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
  2. status = response.getBody();

我收到以下错误：

  1. org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.springframework.web.multipart.commons.CommonsMultipartFile["fileItem"]->org.apache.commons.fileupload.disk.DiskFileItem["inputStream"])

如何解决？谢谢。

英文:

I am trying to pass a spring MultipartFile from my application to a microservice, and using RestTemplate, as the following,

  1.     HttpHeaders headers = new HttpHeaders();
  2.     headers.setContentType(MediaType.MULTIPART_FORM_DATA);
  4.     MultiValueMap&lt;String, Object&gt; body= new LinkedMultiValueMap&lt;&gt;(); 
  5.     body.add(&quot;circularAttachment&quot;, souqBean.getCircularAttachment()); //MultipartFile 
  6.     body.add(&quot;circularEntryId&quot;, souqBean.getCircularEntryId());
  7.     body.add(&quot;circularTitle&quot;, souqBean.getCircularTitle());
  9. 	
  10.     HttpEntity&lt;?&gt; entity = new HttpEntity&lt;MultiValueMap&lt;String, Object&gt;&gt;(body,headers);	
  11.     
  12.     
  13.      ResponseEntity&lt;Boolean&gt; response =    restTemplate.postForEntity(&quot;http://localhost:8081/circular-save&quot;, entity, Boolean.class);
  14.      status=response.getBody();

For more information, below is getCircularAttachment() method

  1. public MultipartFile getCircularAttachment() {
  2. 		return circularAttachment;
  3. 	}

where MultipartFile is a class in Spring: org.springframework.web.multipart.MultipartFile

But on this line,

  1. ResponseEntity&lt;Boolean&gt; response =    restTemplate.postForEntity(&quot;http://localhost:8081/circular-save&quot;, entity, Boolean.class);
  2.  status=response.getBody();

I get the following error:

  1. org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.springframework.web.multipart.commons.CommonsMultipartFile[&quot;fileItem&quot;]-&gt;org.apache.commons.fileupload.disk.DiskFileItem[&quot;inputStream&quot;])
  2. at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:293)
  3. at org.springframework.http.converter.AbstractGenericHttpMessageConverter.writeInternal(AbstractGenericHttpMessageConverter.java:115)
  4. at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227)
  5. at org.springframework.http.converter.FormHttpMessageConverter.writePart(FormHttpMessageConverter.java:373)
  6. at org.springframework.http.converter.FormHttpMessageConverter.writeParts(FormHttpMessageConverter.java:353)
  7. at org.springframework.http.converter.FormHttpMessageConverter.writeMultipart(FormHttpMessageConverter.java:342)
  8. at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:257)
  9. at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:89)
  10. at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:897)
  11. at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:658)
  12. at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:621)
  13. at org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:415)
  14. at ae.gov.adm.saeed.web.controller.util.CircularsControllerUtil.saveCircularView(CircularsControllerUtil.java:390)
  15. at ae.gov.adm.saeed.web.controller.CircularsController.saveCircular(CircularsController.java:87)
  16. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  17. at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  18. at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  19. at java.lang.reflect.Method.invoke(Method.java:498)
  20. at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
  21. at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
  22. at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
  23. at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
  24. at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
  25. at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
  26. at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
  27. at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
  28. at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
  29. at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
  30. at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
  31. at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
  32. at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
  33. at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
  34. at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  35. at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
  36. at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  37. at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  38. at ae.gov.adm.saeed.web.security.AuthFilter.doFilter(AuthFilter.java:335)
  39. at ae.gov.adm.saeed.web.security.AuthFilter.doFilter(AuthFilter.java:610)
  40. at ae.gov.adm.common.web.filter.AbstractFilter.doFilter(AbstractFilter.java:47)
  41. at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  42. at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  43. at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
  44. at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
  45. at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  46. at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  47. at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
  48. at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
  49. at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
  50. at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
  51. at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
  52. at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
  53. at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
  54. at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
  55. at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:417)
  56. at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
  57. at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
  58. at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
  59. at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
  60. at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  61. at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  62. at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  63. at java.lang.Thread.run(Thread.java:748)
  64. Caused by: com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.springframework.web.multipart.commons.CommonsMultipartFile[&quot;fileItem&quot;]-&gt;org.apache.commons.fileupload.disk.DiskFileItem[&quot;inputStream&quot;])
  65. at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:59)
  66. at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:26)
  67. at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575)
  68. at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663)
  69. at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156)
  70. at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575)
  71. at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663)
  72. at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156)
  73. at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129)
  74. at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:851)
  75. at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:286)
  76. ... 61 more

How to solve? Thanks.

答案1

得分: 7

这项服务的签名需要 byte[]，因此，即使 ByteInputStream 是可序列化的，它仍然不是正确的发送内容。只需发送那些 byte[]。

  1. body.add("circularAttachment",
  2.          new ByteArrayResource(souqBean.getCircularAttachment().getBytes()));
英文:

The signature of the service is expecting byte[]'s, so even if a ByteInputStream was serializable it would still not be the correct thing to send.
Just send those byte[]'s.

  1. body.add(&quot;circularAttachment&quot;, 
  2. new ByteArrayResource(souqBean.getCircularAttachment().getBytes()));

答案2

得分: 1

代替直接添加多部分文件，您可以尝试添加以下内容：

  1. MultipartFile file = souqBean.getCircularAttachment();
  3. body.add("circularAttachment", new ByteArrayResource(file.getBytes()));
英文:

Instead of adding direct multipart file, could you try adding

  1. MultipartFile file  = souqBean.getCircularAttachment();
  2. body.add(&quot;circularAttachment&quot;, new ByteArrayResource(file.getBytes()));

答案3

得分: 1

根据上面的答案（在Eklavya和Datta Diware的回答中），不允许以_MultipartFile_类型的格式发送我们的文件。但是当我以_byte[]_类型而不是_ByteArrayResource_类型发送文件时，它对我起作用 How to solve the error "No serializer found for class java.io.ByteArrayInputStream " when passing MultipartFile using RestTemplate? 像这样：body.add(&quot;circularAttachment&quot;, file.getBytes()); 我应该提到，我正在使用Spring Boot（v2.4.5）。

英文:

According to above answers(in Eklavya's and Datta Diware's) it's not allowed to send our file in MultipartFile type format. But it worked for me when I send the file in byte[] type not in ByteArrayResource type How to solve the error "No serializer found for class java.io.ByteArrayInputStream " when passing MultipartFile using RestTemplate? It was like in <br> body.add(&quot;circularAttachment&quot;, file.getBytes()); <br> I should mention, I'm using spring boot (v2.4.5)

huangapple
  • 本文由 发表于 2020年4月7日 17:06:58
  • 转载请务必保留本文链接：https://go.coder-hub.com/61076443.html
  • java
  • microservices
  • multipartform-data
  • post
  • resttemplate
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