缺少必需的请求正文内容：org.springframework.web.method.HandlerMethod$HandlerMethodParameter

将 JSON 数据从 JSP 传递到 ResponseBody 中的控制器时出错。

07:13:53.919 DEBUG o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver - Resolving exception from handler [public com.chaitanya.ajax.AjaxResponse com.chaitanya.web.controller.DepartmentController.addDepartment(com.chaitanya.ajax.AjaxResponse)]: 

org.springframework.http.converter.HttpMessageNotReadableException: Required request body content is missing: org.springframework.web.method.HandlerMethod$HandlerMethodParameter@98d8d36c
07:13:54.106 DEBUG o.s.w.s.m.a.ResponseStatusExceptionResolver - Resolving exception from handler [public com.chaitanya.ajax.AjaxResponse com.chaitanya.web.controller.DepartmentController.addDepartment(com.chaitanya.ajax.AjaxResponse)]: org.springframework.http.converter.HttpMessageNotReadableException: Required request body content is missing: org.springframework.web.method.HandlerMethod$HandlerMethodParameter@98d8d36c
07:13:54.125 DEBUG o.s.w.s.m.s.DefaultHandlerExceptionResolver - Resolving exception from handler [public com.chaitanya.ajax.AjaxResponse com.chaitanya.web.controller.DepartmentController.addDepartment(com.chaitanya.ajax.AjaxResponse)]: org.springframework.http.converter.HttpMessageNotReadableException: Required request body content is missing: org.springframework.web.method.HandlerMethod$HandlerMethodParameter@98d8d36c
07:1

Ajax Call：

$.ajax({ 
                        url: "/BusinessReimbursment/addDepartment", 
                        method: 'POST', 
                        dataType: 'json', 
                        data: "{\"message\":\"abc\",\"success\":true}",
                        contentType: 'application/json',
                        mimeType: 'application/json',
                        success: function(data) { 
                            alert(data.id + " " + data.name);
                            commit(true);
                        },
                        error:function(data,status,er) { 
                            alert("error: "+data+" status: "+status+" er:"+er);
                        }
                    });

控制器：

@RestController
public class DepartmentController {

    @Autowired 
    @Qualifier("departmentService")
    private DepartmentService departmentService;

    @RequestMapping(value="/addDepartment", method={RequestMethod.POST})
    public @ResponseBody AjaxResponse addDepartment(@RequestBody AjaxResponse  departmentDTO){
        AjaxResponse response=new AjaxResponse();
        return response;
    }

应用配置.java

@Bean

public RequestMappingHandlerAdapter  annotationMethodHandlerAdapter()
{
    final RequestMappingHandlerAdapter annotationMethodHandlerAdapter = new RequestMappingHandlerAdapter();
    final MappingJackson2HttpMessageConverter mappingJacksonHttpMessageConverter = new MappingJackson2HttpMessageConverter();

    List<HttpMessageConverter<?>> httpMessageConverter = new ArrayList<HttpMessageConverter<?>>();
    httpMessageConverter.add(mappingJacksonHttpMessageConverter);

    String[] supportedHttpMethods = { "POST", "GET", "HEAD" };

    annotationMethodHandlerAdapter.setMessageConverters(httpMessageConverter);
    annotationMethodHandlerAdapter.setSupportedMethods(supportedHttpMethods);

    return annotationMethodHandlerAdapter;
}

请帮我摆脱这种困境。我正在使用Spring 4，jakson 2.3.0

如果我尝试POST请求，它给：org.springframework.web.HttpRequestMethodNotSupportedException：请求方法'POST'不受支持