关于Spring3 MVC的 HttpMediaTypeNotSupportedException

使用框架：Spring3 MVC + dojo1.8

前提：配置spring MVC以JSON数据形式响应请求

使用场景：dojo向Spring MVC发送ajax请求

异常信息：

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org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported  

    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:124)  

    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:91)  

    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:71)  

    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:75)  

    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:156)  

    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:117)  

    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)  

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)  

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)  

    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)  

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)  

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)  

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)  

    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:790)  

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)  

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)  

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)  

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)  

    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)  

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)  

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)  

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)  

    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:89)  

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)  

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)  

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)  

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)  

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)  

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:463)  

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)  

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)  

    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:564)  

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:120)  

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399)  

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:317)  

    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:204)  

    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:311)  

    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)  

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:909)  

    at java.lang.Thread.run(Thread.java:619)  

原因：dojo1.8默认发送的ajax请求类型为'application/x-www-form-urlencoded;charset=UTF-8'，但是Spring MVC使用的是‘application/json’，所以需要在dojo的ajax请求中改成'Content-Type' : 'application/json;charset=utf-8'，如下代码headers块：

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require([ "dojo/request/xhr", "dojo/json" ], function(xhr) {  

            var userInfo = {  

                "userName" : user.value,  

                "password" : passwd.value  

            };  

            xhr.post("/SpringMVCRestful/login", {  

                data : JSON.stringify(userInfo),  

                //query: JSON.stringify(userInfo), //加这个会在url显示参数  

                sync : true,  

                handleAs : "json",  

                timeout : 200000,  

                headers : {  

                    'Content-Type' : 'application/json;charset=utf-8'  

                }  

            }).then(function(response) {  

                alert(response);  

            }, function(err) {  

                alert("err:" + err);  

            });  

        });  

问题解决。

参考：stackover