java - “缺少必需的请求正文 : public org. springframework.http.ResponseEntity<?>

Question

我正在学习 Spring-Boot 功能，并使用 Postman 来了解它们。但是当我运行代码时，我在 Postman 上收到 400 Bad Request Error，如下所示: “缺少必需的请求正文:public org.springframework.http.ResponseEntity”。我是否错过了某个属性或者编码完全错误？

 @RestController
 @RequestMapping("/api/board")
 @CrossOrigin
public class ProjectTaskController {

@Autowired
private ProjectTaskService projectTaskService;

@PostMapping("")
public ResponseEntity<?> addPTToBoard( @Valid @RequestBody ProjectTask projectTask, BindingResult result){
    if(result.hasErrors()) {
        Map<String, String> errorMap= new HashMap<>();

        for(FieldError error: result.getFieldErrors()) {
            errorMap.put(error.getField(), error.getDefaultMessage());
        }
         return new ResponseEntity<Map<String, String>>(errorMap, HttpStatus.BAD_REQUEST);
    }

    ProjectTask newPT= projectTaskService.saveOrUpdateProjectTask(projectTask);
    return new ResponseEntity<ProjectTask>(newPT, HttpStatus.CREATED);
}

projectTask 代码，它也有 getter 和 setter。

@Entity
public class ProjectTask {

@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
private long id;

@NotBlank(message = "summary cannot be blank")
private String summary;
private String acceptanceCriteria;
private String status;

public ProjectTask() {

}

Postman request这里

Answer 1

Redi 这是一个示例请求:

curl -X POST \
  'http://>>>> your endpoint url' \
  -H 'Content-Type: application/json' \
  -d '{
"summary" : "sample summary",
"acceptanceCriteria" : "blabla",
"status" : "fake status"
}'