<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.0.17.Final</version>
</dependency>
<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
</dependency>

@Data
public class Person {

    @NotBlank(message = "username must not be null")
    private String username;

    @Min(value = 1, message = "age must be >= 1")
    @Max(value = 150, message = "age must be < 150")
    private Integer age;
}

    /**
     * 對象驗證器
     */
    public Validator validator() {
        ValidatorFactory validatorFactory =
                Validation
                        .byProvider(HibernateValidator.class)
                        .configure()
                        // 驗證屬性時，如果有一個驗證不通過就返回，不需要驗證所有屬性
                        .addProperty("hibernate.validator.fail_fast", "true")
                        .buildValidatorFactory();
        return validatorFactory.getValidator();
    }

    @Test
    public void test() throws Exception {
        Person person = new Person();
        Set<ConstraintViolation<Person>> validate = validator().validate(person);
        validate.forEach(errorParam -> {
            System.out.println(errorParam.getMessage());
        });
    }

username must not be null

public interface ValidatorPattern {

    /**
     * 正則表達式：驗證用戶名
     * 1.長度在5-17
     * 2.由大寫小寫字母構(gòu)成
     */
    String REGEX_USERNAME = "^[a-zA-Z]\w{5,17}$";

    /**
     * 正則表達式：驗證密碼
     * 密碼只能為 6 - 12位數(shù)字，字母及常用符號組成。
     */
    String REGEX_PASSWORD = "^(?=.*[a-zA-Z])(?=.*[0-9])[A-Za-z0-9._~!@#$^&*]{6,12}$";

    /**
     * 正則表達式：驗證手機號
     */
    String REGEX_MOBILE = "^[1][34578]\d{9}$";

    /**
     * 正則表達式：驗證郵箱
     */
    String REGEX_EMAIL = "^.+@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\.)+[a-zA-Z]{2,}$";

    /**
     * 正則表達式：驗證漢字
     */
    String REGEX_CHINESE = "^[\u4e00-\u9fa5],*$";

    /**
     * 正則表達式：驗證身份證
     */
    String REGEX_ID_CARD = "(^\d{18}$)|(^\d{15}$)";

    /**
     * 正則表達式：驗證URL
     */
    String REGEX_URL = "http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?";

    /**
     * 正則表達式：驗證IP地址
     */
    String REGEX_IP_ADDR = "(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)";

    /**
     * 車牌號正則
     */
    String LICENSE_NO = "^[京津滬渝冀豫云遼黑湘皖魯新蘇浙贛鄂桂甘晉蒙陜吉閩貴粵青藏川寧瓊使領(lǐng)A-Z][A-Z][A-Z0-9]{4,5}[A-Z0-9掛學警港澳]$";

    /**
     * 姓名校驗
     * 1~15位
     * 姓名支持空格和中文的點
     */
    String NAME = "[\u4e00-\u9fa5\u00b7\sA-Za-z]{1,15}$";

    /**
     * 表情正則
     */
    String EMOJI = "[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]";

    /**
     * 數(shù)字正則
     */
    String NUMBER = "^[0-9]*$";

    /**
     * n位的數(shù)字
     */
    String N_NUMS = "^\d{n}$";

}

    @Bean
    @Primary
    public Validator validator() {
        ValidatorFactory validatorFactory =
                Validation
                        .byProvider(HibernateValidator.class)
                        .configure()
                        .addProperty("hibernate.validator.fail_fast", "true")
                        .buildValidatorFactory();
        return validatorFactory.getValidator();
    }

@Slf4j
@RestControllerAdvice
public class BaseExceptionHandler {
    /**
     * spring validation 自動校驗的參數(shù)異常
     *
     * @param e BindException
     * @return R<Void>
     */
    @ResponseStatus(org.springframework.http.HttpStatus.PAYMENT_REQUIRED)
    @ExceptionHandler(BindException.class)
    public R<Void> handler(BindException e) {
        String defaultMsg = e.getBindingResult().getAllErrors()
                .stream()
                .map(ObjectError::getDefaultMessage)
                .collect(Collectors.joining(":"));
        log.warn(defaultMsg);
        return R.of(IRespCode.PARAMETERS_ANOMALIES.getCode(), e.getMessage());
    }
}

    @PostMapping("register")
    public R<Void> register(@Valid @RequestBody Person person) {
        // todo 
        return R.ok();
    }

public @interface Valid {
}
public @interface Validated {
    Class<?>[] value() default {};
}

public interface RegisterGroup {
}

@Data
public class Person {

    @NotBlank(message = "username must not be null")
    private String username;

    @Min(value = 1, message = "age must be >= 1")
    @Max(value = 150, message = "age must be < 150")
    @NotNull(message = "age must not be null", groups = RegisterGroup.class)
    private Integer age;

    @Email(message = "email format error")
    @NotBlank(message = "email must not be null",groups = RegisterGroup.class)
    private String email;
}

    @PostMapping("register")
    public R<Void> register(@Validated(value = RegisterGroup.class) @RequestBody Person person) {
        // todo
        return R.ok();
    }