小编J.C*_*ory的帖子

我有一个 DTO，它在控制器层使用 BeanValidation (javax.validation) 和自定义验证器 (org.springframework.validation.Validator) 的组合进行验证。这样我可以检查提供的输入是否有效，然后将 DTO 转换为实体并将其转发到服务层。

    @Data
    public class UserDTO {

            @NotBlank
            @Size(max = 25)
            private String name;

            @NotNull
            private Date birthday;

            @NotNull
            private Date startDate;

            private Date endDate;

            private Long count;

    }

    public class UserDTOValidator implements Validator {
        private static final String START_DATE= "startDate";
        private static final String END_DATE= "endDate";
        private static final String COUNT= "count";

        @Override
        public boolean supports(Class<?> clazz) {
            return UserDTO.class.isAssignableFrom(clazz);
        }
        @Override
        public void validate(Object target, Errors errors) {

            UserDTO vm = …