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org.springframework.http.converter.HttpMessageNotReadableException when sending a POST request

There are two problems in your code:

You try to convert the JSON into an object inside the controller. This is already done by Spring. It receives the body of the request and tries to convert it into the Java class of the according parameter in the controller method. Your controller method expects a single string: @RequestBody String requestBody

And you are sending an object with two properties:

{ “phonenumber”: “9123456789”, “password”: “password” }

Solution:

Create a class for the values you need to login :

public class Login { public String phonenumber; public String password; // you need a zero argument constructor // maybe you have to add getter and setters }

Change your controller method so it expects an object of this type

[Solved] org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot

09:06:12.163 [http-nio-9207-exec-6] ERROR c.s.p.c.GlobalExceptionHandler – [exceptionHandler,90] – 发生其他异常，原因是；{} org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token at [Source: (PushbackInputStream); line: 1, column: 2] (through reference chain: java.lang.Object[][0]) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:285) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:243) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:205) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:158) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:131) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) 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 com.signature.pc.config.HttpServletRequestReplacedFilter.doFilter(HttpServletRequestReplacedFilter.java:35) 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.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 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.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 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:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 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:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token at [Source: (PushbackInputStream); line: 1, column: 2] (through reference chain: java.lang.Object[][0]) at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59) at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1468) at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1242) at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1148) at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseString(StdDeserializer.java:615) at com.fasterxml.jackson.databind.deser.std.StringArrayDeserializer.deserialize(StringArrayDeserializer.java:157) at com.fasterxml.jackson.databind.deser.std.StringArrayDeserializer.deserialize(StringArrayDeserializer.java:21) at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4526) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3521) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:274) … 58 common frames omitted

Interface input parameter format:

Front end parameter transfer format

[{“id”:”26a0eac8-edb1-43be-9869-4f7c45c0693a”}, {“id”:”E3ECF542585749B996EC0C13907E7D94″}]

.

.

.

the problem is obvious. The format of the value passed by the front end is incorrect. What we need is an array of string type, while the data passed by the front end is object type data.

The front-end transmission parameter is changed to:

[ “30lkbc2b-1c80-46c3-857e-e934e9842c08”, “E3ECF542585749B996EC0C13907E7D94” ]

That’s it

Java Examples for org.springframework.http.converter.HttpMessageNotReadableException

/** * If the incoming message is an {@link ActionMessage}, indicating a standard Flex Remoting or Messaging * request, invokes Spring BlazeDS’s {@link ExceptionTranslator}s with the {@link AuthenticationException} and * sends the resulting {@link MessageException} as an AMF response to the client. * *

If the request is unabled to be deserialized to AMF, if the resulting deserialized object is not an * ActionMessage, or if no appropriate ExceptionTranslator is found, will simply * delegate to the parent class to return a 403 response. */ public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException { if (CollectionUtils.isEmpty(this.exceptionTranslators)) { exceptionTranslators = Collections.singleton(DEFAULT_TRANSLATOR); } HttpInputMessage inputMessage = new ServletServerHttpRequest(request); HttpOutputMessage outputMessage = new ServletServerHttpResponse(response); if (!converter.canRead(Object.class, inputMessage.getHeaders().getContentType())) { super.commence(request, response, authException); return; } ActionMessage deserializedInput = null; try { deserializedInput = (ActionMessage) this.converter.read(ActionMessage.class, inputMessage); } catch ( HttpMessageNotReadableException ex) { log.info(“Authentication failure detected, but request could not be read as AMF.”, ex); super.commence(request, response, authException); return; } if (deserializedInput instanceof ActionMessage) { for (ExceptionTranslator translator : this.exceptionTranslators) { if (translator.handles(authException.getClass())) { MessageException result = translator.translate(authException); ErrorMessage err = result.createErrorMessage(); MessageBody body = (MessageBody) ((ActionMessage) deserializedInput).getBody(0); Message amfInputMessage = body.getDataAsMessage(); err.setCorrelationId(amfInputMessage.getMessageId()); err.setDestination(amfInputMessage.getDestination()); err.setClientId(amfInputMessage.getClientId()); ActionMessage responseMessage = new ActionMessage(); responseMessage.setVersion(((ActionMessage) deserializedInput).getVersion()); MessageBody responseBody = new MessageBody(); responseMessage.addBody(responseBody); responseBody.setData(err); responseBody.setTargetURI(body.getResponseURI()); responseBody.setReplyMethod(MessageIOConstants.STATUS_METHOD); converter.write(responseMessage, amfMediaType, outputMessage); response.flushBuffer(); return; } } } super.commence(request, response, authException); }

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