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，
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
body.add("circularAttachment", souqBean.getCircularAttachment()); // MultipartFile
body.add("circularEntryId", souqBean.getCircularEntryId());
body.add("circularTitle", souqBean.getCircularTitle());
HttpEntity<?> entity = new HttpEntity<MultiValueMap<String, Object>>(body, headers);
ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
status = response.getBody();
更多信息，请参考getCircularAttachment()方法：
public MultipartFile getCircularAttachment() {
return circularAttachment;
}
其中，MultipartFile是Spring中的一个类：org.springframework.web.multipart.MultipartFile
但是在这一行，
ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
status = response.getBody();
我收到以下错误：
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,
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, Object> body= new LinkedMultiValueMap<>();
body.add("circularAttachment", souqBean.getCircularAttachment()); //MultipartFile
body.add("circularEntryId", souqBean.getCircularEntryId());
body.add("circularTitle", souqBean.getCircularTitle());
HttpEntity<?> entity = new HttpEntity<MultiValueMap<String, Object>>(body,headers);
ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
status=response.getBody();
For more information, below is getCircularAttachment() method
public MultipartFile getCircularAttachment() {
return circularAttachment;
}
where MultipartFile is a class in Spring: org.springframework.web.multipart.MultipartFile
But on this line,
ResponseEntity<Boolean> response = restTemplate.postForEntity("http://localhost:8081/circular-save", entity, Boolean.class);
status=response.getBody();
I get the following error:
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"])
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:293)
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.writeInternal(AbstractGenericHttpMessageConverter.java:115)
at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227)
at org.springframework.http.converter.FormHttpMessageConverter.writePart(FormHttpMessageConverter.java:373)
at org.springframework.http.converter.FormHttpMessageConverter.writeParts(FormHttpMessageConverter.java:353)
at org.springframework.http.converter.FormHttpMessageConverter.writeMultipart(FormHttpMessageConverter.java:342)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:257)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:89)
at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:897)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:658)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:621)
at org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:415)
at ae.gov.adm.saeed.web.controller.util.CircularsControllerUtil.saveCircularView(CircularsControllerUtil.java:390)
at ae.gov.adm.saeed.web.controller.CircularsController.saveCircular(CircularsController.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at ae.gov.adm.saeed.web.security.AuthFilter.doFilter(AuthFilter.java:335)
at ae.gov.adm.saeed.web.security.AuthFilter.doFilter(AuthFilter.java:610)
at ae.gov.adm.common.web.filter.AbstractFilter.doFilter(AbstractFilter.java:47)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:417)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
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["fileItem"]->org.apache.commons.fileupload.disk.DiskFileItem["inputStream"])
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:59)
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:26)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:851)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:286)
... 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[]。
body.add("circularAttachment",
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.
body.add("circularAttachment",
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：
MultipartFile file = souqBean.getCircularAttachment();
body.add("circularAttachment", new ByteArrayResource(file.getBytes()));
英文:
Instead of adding direct multipart file, could you try adding
MultipartFile file = souqBean.getCircularAttachment();
body.add("circularAttachment", 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 
像这样：body.add("circularAttachment", 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 It was like in <br> body.add("circularAttachment", file.getBytes()); <br> I should mention, I'm using spring boot (v2.4.5)
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