Spring returns 使用 MethodValidationPostProcessor 时为 404

Question

我的测试有问题Spring 启动应用程序。它工作得很好，但是当我通过添加依赖项等并添加 @Configuration:

启用 Spring 验证时

@Configuration
public class TestConfiguration {

  @Bean
  public MethodValidationPostProcessor methodValidationPostProcessor() {
    return new MethodValidationPostProcessor();
  }
}

我的测试端点得到 404。

{
    "timestamp": 1601507037178,
    "status": 404,
    "error": "Not Found",
    "message": "No message available",
    "path": "/test"
}

我已经从类似的问题（例如 here or ）中应用了一些 solutions/proposals，但没有成功。

这是我的代码： https://github.com/zolv/error-handling-test

API接口：

@Validated
public interface TestApi {

  @PostMapping(
      value = "/test",
      produces = {"application/json"},
      consumes = {"application/json"})
  @ResponseBody
  ResponseEntity<TestEntity> getTest(@Valid @RequestBody(required = false) TestEntity request);
}

TestEntity 只是送东西:

@Data
public class TestEntity {
  @JsonProperty("test")
  @NotNull
  private String test;
}

控制器实现：

@RestController
@RequiredArgsConstructor
@Validated
public class TestController implements TestApi {
  @Override
  @ResponseBody
  public ResponseEntity<TestEntity> getTest(@Valid @RequestBody TestEntity request) {
    return ResponseEntity.ok(request);
  }
}

我的控制器建议：

@ControllerAdvice
public class DefaultErrorHandlerAdvice extends ResponseEntityExceptionHandler {

  @ExceptionHandler(value = {ConstraintViolationException.class})
  @ResponseStatus(value = HttpStatus.BAD_REQUEST)
  @ResponseBody
  public ResponseEntity<String> handleValidationFailure(ConstraintViolationException ex) {
    StringBuilder messages = new StringBuilder();

    for (ConstraintViolation<?> violation : ex.getConstraintViolations()) {
      messages.append(violation.getMessage());
    }

    return ResponseEntity.badRequest().body(messages.toString());
  }

  @Override
  @ResponseBody
  @ResponseStatus(HttpStatus.BAD_REQUEST)
  protected ResponseEntity<Object> handleMethodArgumentNotValid(
      MethodArgumentNotValidException ex,
      HttpHeaders headers,
      HttpStatus status,
      WebRequest request) {
    return ResponseEntity.status(HttpStatus.BAD_REQUEST)
        .contentType(MediaType.APPLICATION_PROBLEM_JSON)
        .body("problem");
  }
}

申请：

@SpringBootApplication
@EnableWebMvc
@ComponentScan(basePackages = "com.test")
public class TestApplication {

  public static void main(String[] args) {
    SpringApplication.run(TestApplication.class, args);
  }
}

我使用的测试，但使用 Postman 也失败了：

@SpringJUnitConfig
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class TestControllerTest {

  @Autowired protected TestRestTemplate restTemplate;

  @Test
  void registrationHappyPath() throws Exception {
    /*
     * Given
     */
    final TestEntity request = new TestEntity();

    /*
     * When/
     */
    final ResponseEntity<String> response =
        restTemplate.postForEntity("/test", request, String.class);

    /*
     * Then
     */
    Assertions.assertEquals(HttpStatus.BAD_REQUEST, response.getStatusCode());

    final String body = response.getBody();
    Assertions.assertNotNull(body);
  }
}

如果我注释掉 TestConfiguration 那么一切正常。预先感谢您的帮助。

Answer 1

您应该设置 MethodValidationPostProcessor#setProxyTargetClass(true)，因为默认情况下 MethodValidationPostProcessor 使用 JDK 代理，这会导致您的控制器在 Spring 上下文中丢失。

当 AbstractHandlerMethodMapping#processCandidateBean 被调用时 isHandler(Class<?> beanType) 将 return false 因为 JDK 代理不包含 @RestController 注释。

  public MethodValidationPostProcessor methodValidationPostProcessor() {
    MethodValidationPostProcessor mvProcessor = new MethodValidationPostProcessor();
    mvProcessor.setProxyTargetClass(true);
    return mvProcessor;
  }

Spring returns 使用 MethodValidationPostProcessor 时为 404

Spring returns 404 when using MethodValidationPostProcessor

java

validation

http-status-code-404

spring-boot