Spring boot 方法参数验证

Spring boot 自动配置与注入 MethodValidationPostProcessor

只需要在需要验证的类上注解 @Validated

并通过捕获 ConstraintViolationException 异常，处理后续提示消息等

@RestController
@Validated
public class UserApi {

	@GetMapping("/get")
	MarketCat get(@NotNull(message="缺少参数uid") String uid) {
		return userSvc.getUser(uid);
	}

	@Resource
	private UserSvc userSvc;

}

异常处理

@ControllerAdvice
public class GlobalExceptionHandler {

	@ResponseBody
	@ExceptionHandler(ConstraintViolationException.class)
	public String handleApiConstraintViolationException(ConstraintViolationException ex) {
		String message = "";
		Set> violations = ex.getConstraintViolations();
		for (ConstraintViolation violation : violations) {
			message += violation.getMessage() + ", ";
		}
		return message;
	}

}