带有批注的Spring Boot验证

Question

我正在尝试使用@Valid验证RequestBody。这是我阅读的有关此文章：https://dimitr.im/validating-the-input-of-your-rest-api-with-spring。这是我的代码：

 @PutMapping("/update")
    public ResponseEntity<?> update(@RequestBody @Valid ProfileDTO medicationDTO) {
        try {
            profileService.update(medicationDTO);
        } catch (Exception e) {
            return ResponseEntity
                    .badRequest()
                    .body(new MessageResponseDTO("Error: User not found!"));
        }
        return ResponseEntity.ok(new MessageResponseDTO("User updated successfully!"));
    }

@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class ProfileDTO {

    private Integer userId;
    private String username;
    private String email;

    @NotBlank(message = "First name cannot be empty.")
    @Min(1)
    private String firstName;

    @NotBlank(message = "Last name cannot be empty.")
    @Min(1)
    private String lastName;

    @NotBlank(message = "Registration plate cannot be empty.")
    @Min(1)
    private String registrationPlate;
}

但是，当我尝试从邮递员状态200发送此邮件时：

{
    "userId": "2",
    "firstName": "",
    "lastName": "Smith",
    "registrationPlate": "AB20CDE"
}

为什么验证无效？

Answer 1

您在药DTO之后立即缺少BindingResult，例如：

    public ResponseEntity<?> update(@RequestBody @Valid ProfileDTO medicationDTO, BindingResult bindingResult) 

并且您需要检查bindingResult.hasErrors()是否为真，然后引发所需的异常。