我有一个相当模糊的问题，经过几天的调试后我无法弄清楚。问题是我们的PUT REST API之一开始在生产中抛出Unsupported Media type。以下是方法的定义：
@RequestMapping(value = "/v1/put/user/profile", method = RequestMethod.PUT)
public String updateProfile(@RequestBody UserAndroid user, ModelMap model,
HttpServletRequest request, HttpServletResponse response) {
}
在PUT请求中，我们只是按如下方式传递手机号码：
{ "mobile": "9999559848"}
这是UserAndroid实体：
https://gist.github.com/madhur/eb0d9d006f4e4da706d7
现在，最令人惊讶的部分。在追踪github提交之后，我们将错误追溯到User中的新引入的字段（不是UserAndroid。它们是不同但相关的）实体（https://gist.github.com/madhur/06bbcfe11c0e751ab4df）：
@OneToOne(mappedBy="user", fetch=FetchType.LAZY)
private FullContactDetails fullContactDetails;
如果我们删除此字段，API将正常运行。任何人都可以告诉我为什么会这样？
更新：以下是执行请求时的Spring MVC日志：
https://gist.github.com/madhur/ef357f614b18c6ed42cb
使用Spring 3.2.2。是的，我们在classpath中同时拥有gson-2.2.4.jar和jackson。
24 Mar 2015 20:15:14 > org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter - Opening JPA EntityManager in OpenEntityManagerInViewFilter
24 Mar 2015 20:15:14 > org.springframework.transaction.support.TransactionSynchronizationManager - Bound value [org.springframework.orm.jpa.EntityManagerHolder@6427300a] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@47672d99] to thread [http-bio-8080-exec-3]
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Bound request context to thread: org.apache.struts2.dispatcher.StrutsRequestWrapper@5927198c
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - DispatcherServlet with name 'mvc' processing PUT request for [/mobileapp/v1/put/user/profile.json]
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Testing handler map [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping@3bf55f38] in DispatcherServlet with name 'mvc'
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Looking up handler method for path /mobileapp/v1/put/user/profile.json
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Found 1 matching mapping(s) for [/mobileapp/v1/put/user/profile.json] : [{[/mobileapp/v1/put/user/profile.*],methods=[PUT],params=[],headers=[],consumes=[],produces=[],custom=[]}]
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Returning handler method [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]
24 Mar 2015 20:15:14 > org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'mobileAppServiceController'
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Testing handler adapter [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter@439ee876]
24 Mar 2015 20:15:14 > org.springframework.transaction.support.TransactionSynchronizationManager - Retrieved value [org.springframework.orm.jpa.EntityManagerHolder@6427300a] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@47672d99] bound to thread [http-bio-8080-exec-3]
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Connecting to database for operation 'prepareStatement'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'isClosed'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'getAutoCommit'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'isClosed'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'getWarnings'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'clearWarnings'
24 Mar 2015 20:15:14 > org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy - Using existing database connection for operation 'close'
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.method.annotation.RequestParamMethodArgumentResolver@18d649bf] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.method.annotation.RequestParamMapMethodArgumentResolver@3d9c4ab3] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.PathVariableMethodArgumentResolver@5fec4d5e] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.PathVariableMapMethodArgumentResolver@7bd9d9bd] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.MatrixVariableMethodArgumentResolver@1b6646d1] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.MatrixVariableMapMethodArgumentResolver@426f839b] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor@27295730] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.support.HandlerMethodArgumentResolverComposite - Testing if argument resolver [org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor@b1b2466] supports [class com.lsa.akosha.entity.UserAndroid]
24 Mar 2015 20:15:14 > org.springframework.web.method.HandlerMethod - Error resolving argument [0] [type=com.lsa.akosha.entity.UserAndroid]
HandlerMethod details:
Controller [com.lsa.akosha.webservices.MobileAppServiceController]
Method [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:149)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:180)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:95)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:123)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:849)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:649)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:180)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver - Resolving exception from handler [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver - Resolving exception from handler [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver - Resolving exception from handler [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver - Resolving exception from handler [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
24 Mar 2015 20:15:14 > org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver - Resolving exception from handler [public java.lang.String com.lsa.akosha.webservices.MobileAppServiceController.updateProfile(com.lsa.akosha.entity.UserAndroid,org.springframework.ui.ModelMap,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'mvc': assuming HandlerAdapter completed request handling
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Cleared thread-bound request context: org.apache.struts2.dispatcher.StrutsRequestWrapper@5927198c
24 Mar 2015 20:15:14 > org.springframework.web.servlet.DispatcherServlet - Successfully completed request
24 Mar 2015 20:15:14 > org.springframework.web.context.support.XmlWebApplicationContext - Publishing event in WebApplicationContext for namespace 'mvc-servlet': ServletRequestHandledEvent: url=[/mobileapp/v1/put/user/profile.json]; client=[127.0.0.1]; method=[PUT]; servlet=[mvc]; session=[null]; user=[null]; time=[352ms]; status=[OK]
24 Mar 2015 20:15:14 > org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.context.annotation.internalScheduledAnnotationProcessor'
24 Mar 2015 20:15:14 > org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'incomingListener'
24 Mar 2015 20:15:14 > org.springframework.web.context.support.XmlWebApplicationContext - Publishing event in Root WebApplicationContext: ServletRequestHandledEvent: url=[/mobileapp/v1/put/user/profile.json]; client=[127.0.0.1]; method=[PUT]; servlet=[mvc]; session=[null]; user=[null]; time=[352ms]; status=[OK]
24 Mar 2015 20:15:14 > org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'incomingListener'
24 Mar 2015 20:15:14 > org.springframework.transaction.support.TransactionSynchronizationManager - Removed value [org.springframework.orm.jpa.EntityManagerHolder@6427300a] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@47672d99] from thread [http-bio-8080-exec-3]
24 Mar 2015 20:15:14 > org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter - Closing JPA EntityManager in OpenEntityManagerInViewFilter
24 Mar 2015 20:15:14 > org.springframework.orm.jpa.EntityManagerFactoryUtils - Closing JPA EntityManager
答案 0 :(得分：2)
请检查您已定义内容协商视图解析程序的XML配置，您应该已经定义了json类型媒体类型的映射。在更新这些更改后查看它是否有效
这并没有直接解决问题，但内部很少的依赖关系解决了json的内容类型的映射以及尝试是否有效