Java SpringMVC:ModelAndViewContainer:View为[null]；默认模型{Some Object}

我使用SpringMVC和ContentNegotingViewResolver来处理我的响应对象并解析为特定格式。当我从控制器返回对象时，作为响应，它添加我的响应对象，但也添加我用来映射请求参数的对象。我的控制器被用作rest控制器。因为我想使用spring和ContentNegotiatingViewResolver创建rest服务。调试后，我发现InvocableHandlerMethdod类中invokeForRequest方法包含以下参数：

public final Object invokeForRequest(NativeWebRequest request, ModelAndViewContainer mavContainer,
        Object... providedArgs) throws Exception {
  ...............................................

在ModelAndViewContainer参数中包含以下详细信息：

ModelAndViewContainer: View is [null]; default model {oauthClientDetail=com.netsol.entities.OauthClientDetail@9ac35e, org.springframework.validation.BindingResult.oauthClientDetail=org.springframework.validation.BeanPropertyBindingResult: 0 errors}

我无法理解为什么要在ModelAndViewContainer中设置OauthClientDetail对象，以及如何防止这种情况

以下是我的控制器代码：

@RequestMapping(value = "/changePassword", method = RequestMethod.POST)
public ApiResponse<UserDetail> changePassword(@Valid OauthClientDetail clientDetail,
        BindingResult bindingResult,
        @RequestParam(value = "password", required = true) String password) {
    logger.info("In changePassword Service...... ");

    if(bindingResult.hasErrors()){
        throw new InvalidRequestException("Error", bindingResult);
    }

    UserDetail detail = userService.changeUserPassword(password, clientDetail, encoder);
    ApiResponse<UserDetail> response = new ApiResponse<UserDetail>();
    if(detail != null){
        response.setErrorCode(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getValue());
        response.setErrorMessage(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getMessage());
        response.setResponse(detail);
    }else{
        response.setErrorCode(CommonUtility.API_RESPONSE_STATUS.FAIL.getValue());
        response.setErrorMessage(CommonUtility.API_RESPONSE_STATUS.FAIL.getMessage());
        response.setResponse(null);
    }
    return response; 
}

我的回应是：

{
"oauthClientDetail": {
    "userId": null,
    "clientId": "my-client-with-secret",
    "additionalInformation": null,
    "authorities": null,
    "authorizedGrantTypes": null,
    "autoapprove": null,
    "clientSecret": "12345678",
    "clientSecretConfirm": "12345678",
    "resourceIds": null,
    "scope": null,
    "webServerRedirectUri": null,
    "createdOn": null,
    "updatedOn": null,
    "active": null,
    "lastLogin": null
},
"apiResponse": {
    "errorCode": 0,
    "errorMessage": "Success",
    "response": {
        "userName": "my-client-with-secret",
        "dateCreated": null,
        "dateUpdated": null,
        "active": "true"
    }
}
}

---

作为响应，oauthClientDetail对象包含我随请求发送并映射到该对象中的值。由此，我假设在响应中设置了map对象。如何防止在响应中设置此对象

我从这个链接中找到了解决方案。需要在控制器中添加@ResponseBody注释，并设置products={application/json}。以下是我的新代码：

 @RequestMapping(value = "/changePassword", method = RequestMethod.POST, produces={"application/json"})
public @ResponseBody ApiResponse<UserDetail> changePassword(@Valid OauthClientDetail clientDetail,
        BindingResult bindingResult,
        @RequestParam(value = "password", required = true) String password) {
    logger.info("In changePassword Service...... ");

    if(bindingResult.hasErrors()){
        throw new InvalidRequestException("Error", bindingResult);
    }

    UserDetail detail = userService.changeUserPassword(password, clientDetail, encoder);
    ApiResponse<UserDetail> response = new ApiResponse<UserDetail>();
    if(detail != null){
        response.setSuccess(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getValue());
        response.setMessage(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getMessage());
        response.setResponse(detail);
    }else{
        response.setSuccess(CommonUtility.API_RESPONSE_STATUS.FAIL.getValue());
        response.setMessage(CommonUtility.API_RESPONSE_STATUS.FAIL.getMessage());
        response.setResponse(null);
    }
    return response; 
}

{
"oauthClientDetail": {
    "userId": null,
    "clientId": "my-client-with-secret",
    "additionalInformation": null,
    "authorities": null,
    "authorizedGrantTypes": null,
    "autoapprove": null,
    "clientSecret": "12345678",
    "clientSecretConfirm": "12345678",
    "resourceIds": null,
    "scope": null,
    "webServerRedirectUri": null,
    "createdOn": null,
    "updatedOn": null,
    "active": null,
    "lastLogin": null
},
"apiResponse": {
    "errorCode": 0,
    "errorMessage": "Success",
    "response": {
        "userName": "my-client-with-secret",
        "dateCreated": null,
        "dateUpdated": null,
        "active": "true"
    }
}
}

 @RequestMapping(value = "/changePassword", method = RequestMethod.POST, produces={"application/json"})
public @ResponseBody ApiResponse<UserDetail> changePassword(@Valid OauthClientDetail clientDetail,
        BindingResult bindingResult,
        @RequestParam(value = "password", required = true) String password) {
    logger.info("In changePassword Service...... ");

    if(bindingResult.hasErrors()){
        throw new InvalidRequestException("Error", bindingResult);
    }

    UserDetail detail = userService.changeUserPassword(password, clientDetail, encoder);
    ApiResponse<UserDetail> response = new ApiResponse<UserDetail>();
    if(detail != null){
        response.setSuccess(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getValue());
        response.setMessage(CommonUtility.API_RESPONSE_STATUS.SUCCESS.getMessage());
        response.setResponse(detail);
    }else{
        response.setSuccess(CommonUtility.API_RESPONSE_STATUS.FAIL.getValue());
        response.setMessage(CommonUtility.API_RESPONSE_STATUS.FAIL.getMessage());
        response.setResponse(null);
    }
    return response; 
}