Spring MVC：无法以JSON格式提交表单数据

Question

在执行此操作时出现以下异常。

HandlerMethod details: 
Controller [application.entry.controller.UserController] 
Method [public java.lang.String application.entry.controller.UserController.handleSave(java.util.List<java.util.Map<java.lang.String, java.lang.String>>)] 

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded' not supported 
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:124)[org.springframework.web.servlet-3.1.1.RELEASE.jar:3.1.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:91)[org.springframework.web.servlet-3.1.1.RELEASE.jar:3.1.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:71)[org.springframework.web.servlet-3.1.1.RELEASE.jar:3.1.1.RELEASE] 

控制器类：

@RequestMapping(value="/save", method=RequestMethod.POST) 
@ResponseBody public String handleSave(@RequestBody List<Map<String, String>> client) 
    { 
     Map<String, String> formInputs = new HashMap<String, String>(); 

     for (Map<String, String> formInput : client) { 
      formInputs.put(formInput.get("name"), formInput.get("value")); 
     } 

我曾尝试与@RequestMapping(value="/save", method=RequestMethod.POST, headers = "Accept=application/json")也不过错误是一样的。

为spring-servlet.xml

<bean id="jacksonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean> 
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> 
    <property name="messageConverters"> 
     <list> 
     <ref bean="jacksonMessageConverter"/> 
     </list> 
    </property> 
    </bean> 

jQuery的提交：

$('form').submit(function() { 
        alert(); 
        $.ajax({ 
         url: $(this).attr('action'), 
         type: 'POST', 
         data: JSON.stringify($(this).serializeArray()), 
         contentType: 'application/json', 
         success: function (data) { 
          alert('data') 
         }, 
         error: function (jqXHR, textStatus, errorThrown) { 
          alert('An error has occured!! :-(') 
         } 
        }) 

        return false 
       }) 

Answer 1

尝试调整@RequestMapping接受JSON。

@RequestMapping(
    value="/save", 
    method=RequestMethod.POST, 
    consumes="application/json")