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

Question

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调用：

$.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;
    }

app config.Java

@豆

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;
}

请帮我解决这个问题。我正在使用Spring 4，jackson 2.3.0

如果我尝试POST请求它给出：org.springframework.web.HttpRequestMethodNotSupportedException：不支持请求方法'POST'

Answer 1

您不应该发送带有HTTP GET请求的请求正文。您应该修改addDepartment()以便它只支持POST，并将您的JSON POST到该端点。如果要获取有关某个部门的信息，您应该创建一个单独的控制器方法来执行该操作（并且不需要请求主体）。

此外，仔细检查您的端点定义，因为您在$.ajax调用中拼错了“reimbursement”。

Answer 2

我也有同样的问题。我使用“Postman”来获取JSON请求。代码本身没错。我只是将内容类型设置为JSON（application/json）并且它工作正常，如下图所示

Answer 3

我对你的代码进行了一些小的修改，并用我拥有的弹簧项目对它进行了测试，它的工作原理，如果我使用GET，逻辑只能用于POST，它会抛出一个带有无效请求的错误。同样在你的ajax调用中我注释掉了commit（true），标记了浏览器调试器并且没有定义它的错误。只需修改url以适合您的Spring项目架构。

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



@RequestMapping(value="/addDepartment", method=RequestMethod.POST)
  public AjaxResponse addDepartment(@RequestBody final AjaxResponse  departmentDTO)
  {
    System.out.println("addDepartment: >>>>>>> "+departmentDTO);
    AjaxResponse response=new AjaxResponse();
    response.setSuccess(departmentDTO.isSuccess());
    response.setMessage(departmentDTO.getMessage());
    return response;
  }

Answer 4

试试这个：

@RequestBody（required = false）String str

Answer 5

对不起伙计..实际上是因为我需要一个csrf令牌才能解决这个问题。我已经实现了spring security并启用了csrf。通过ajax调用，我需要传递csrf令牌。