求求你别在用IF ELSE校验参数了

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
 <!-- 解析html片段-->
<dependency>
  <groupId>org.jsoup</groupId>
  <artifactId>jsoup</artifactId>
  <version>1.8.3</version>
</dependency>

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

@Data
public class User {
    //注解对静态变量不生效
    @NotBlank(message = "性别不能为空")
    private static String sex;
    
    @NotBlank(message = "姓名不能为空")
    @Size(min = 2,max = 5,message = "姓名长度不规范")
    private String name;
    
    @NotNull(message = "年龄不能为空")
    @Max(value = 30,message = "年龄超过最大值30")
    @Range(min=30,max=60)
    private Integer age;
    
    @DecimalMax(value = "108.88",message = "超过最大108.88",inclusive = false)
    private Double price;
    
    @Past(message = "生日不能大于当前日期")
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime birthday;
    
    @Email(message = "电子邮箱格式不正确")
    private String email;
    
    @SafeHtml(message = "非法请求参数")
    private String content;
}

 //单个对象校验
    @PostMapping("user")
    //校验参数后边跟BindingResult,spring不会抛出异常,将校验结果封装在这个对象中
    public String person(@Valid User user,BindingResult bindingResult){
        System.out.println(user);
        StringBuilder sb = new StringBuilder();
        if(bindingResult.hasErrors()){
            List<ObjectError> allErrors = bindingResult.getAllErrors();
            for(ObjectError error:allErrors){
                sb.append(error.getDefaultMessage()+",");
            }
        }
        return sb.toString();
    }

@RestControllerAdvice
@Slfj
@AutoConfigurationPackage
public class GlobalExceptionHandler {
    //spring-context包里面的异常
    //实体对象前不加@RequestBody注解,单个对象内属性校验未通过抛出的异常类型
    @ExceptionHandler(BindingException.class)
    public ResponseEntity<ExceptionResponseVO> methodArguments(BindingException e){
        log.warn("throw BindingException,{}",e);
        return ResponseEntity.status(HttpStatus.BAD_REQUEST)
                .body(ExceptionResponseVO.error(NEError.INVALID_PARAMETER, e.getBindingResult().getFieldError().getDefaultMessage()));
    }
    
    //实体对象前不加@RequestBody注解,校验方法参数或方法返回值时,未校验通过时抛出的异常
    //Validation-api包里面的异常
    @ExceptionHandler(ValidationException.class)
    public ResponseEntity<ExceptionResponseVO> methodArguments(ValidationException e){
        log.warn("throw ValidationException,{}",e);
       return ResponseEntity.status(HttpStatus.BAD_REQUEST)            .body(ExceptionResponseVO.error(NEError.INVALID_PARAMETER,e.getCause().getMessage()));
    }
    
    //spring-context包里面的异常,实体对象前加@RequestBody注解,抛出的异常为该类异常
    //方法参数如果带有@RequestBody注解，那么spring mvc会使用RequestResponseBodyMethodProcessor   //对参数进行序列化,并对参数做校验
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ExceptionResponseVO> methodArguments(MethodArgumentNotValidException e){
        log.warn("throw MethodArgumentNotValidException,{}",e);
       return ResponseEntity.status(HttpStatus.BAD_REQUEST)
                .body(ExceptionResponseVO.error(NEError.INVALID_PARAMETER,             e.getBindingResult().getFieldError().getDefaultMessage()));
    }
    
    @ExceptionHandler(Exception.class)
    public ResponseEntity methodArguments(Exception e){
        log.warn("throw exception,{}",e);
        return ResponseEntity.badRequest().body(e.getMessage());
    }
}

@Data
public class User2 {
    @NotBlank(message = "姓名不能为空")
    private String name;
    @Max(value = 50,message = "年龄不能为空")
    private Integer age;
    @Valid
    @NotNull(message = "商品不能为空")
    private Goods goods;
}

@Data
public class Goods{
    @NotBlank(message = "商品名称不能为空")
    private String goodsName;
    @NotNull(message = "商品价格不能为空")
    private Double goodsPrice;
}

//级联校验
 @PostMapping("cascade")
public String cascade(@Valid @RequestBody User2 user2){
     return "OK";
 }

@Data
public class User3 {
    @NotBlank(message = "姓名不能为空")
    private String name;
    @Max(value = 50,message = "年龄不能为空")
    private Integer age;
    
    @Valid
    @NotEmpty(message = "商品列表不能为空")
    private List<@NotNull(message = "商品不能为空") Goods> goodsList;
}

//容器元素校验
@PostMapping("container")
public String container(@Valid @RequestBody User3 user3){
    return "OK";
}

@RestController
@RequestMapping("validator")
@Validated
public class ValidatorController {
 @GetMapping("demo1")
    public String test1(@Range(min = 1,max = 999,message = "起始笔数超过区间范围")@RequestParam int pageIndex, @Range(min = 1,max = 999,message = "查询笔数超过区间范围"）@RequestParam int pageSize){
        return "ok";
    }
}

@Service
@Validated
public class UserService {
 //校验方法参数
    public String queryUserName(@NotNull(message = "用户参数不能为空") User user){
        return user.getName();
    }
    
    //校验方法返回值
    @NotNull(message = "用户信息不存在")
    public User queryUser(User user){
        return null;
    }
}

@Data
public class UserGroup {
    @NotNull(message = "id不能为空",groups = UpdateUser.class)
    private Integer id;
    @NotBlank(message = "姓名不能为空",groups = AddUser.class)
    private String name;
    @NotNull(message = "年龄不能为空",groups = AddUser.class)
    private Integer age;

    public interface AddUser{}
    public interface UpdateUser{}
}

 //分组校验:添加用户
    @PostMapping("addUser")
    public String addUser(@Validated(UserGroup.AddUser.class) UserGroup userGroup){
        return "OK";
    }

 //分组校验:修改用户
    @PostMapping("updateUser")
    public String updateUser(@Validated(UserGroup.UpdateUser.class) UserGroup userGroup){
        return "OK";
    }

@Data
public class UserDTO {
    @NotNull(message = "id不能为空",groups = {UpdateUser.class})
    private Integer id;
    @NotBlank(message = "姓名不能为空",groups = {AddUser.class})
    private String name;
    @NotNull(message = "年龄不能为空",groups = {AddUser.class})
    private Integer age;
    @NotNull(message = "版本不能为空")//不配置goups，默认就是Default分组
    private Integer version;

 @GroupSequence({AddUser.class, UpdateUser.class, Default.class})
    public interface AddUpdateGroup{}
    public interface AddUser{}
    public interface UpdateUser{}
}

@PostMapping("user")
public String saveUser(@Validated(UserDTO.AddUpdateGroup.class) UserDTO userDTO){
 userMapper.addUser(userDTO);
    return "ok";
}

@Target({ ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = SexConstraintValidator.class)
public @interface Sex {

    String message() default "性别参数有误";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default { };
}

public class SexConstraintValidator
        implements ConstraintValidator<Sex,String> {
    /**
     * 性别约束逻辑
     * @param value
     * @param constraintValidatorContext
     * @return
     */
    @Override
    public boolean isValid(String value, ConstraintValidatorContext constraintValidatorContext) {
        //如果value为null,那么该校验规则不生效;可搭配@NotNull注解使用,更加灵活
        if(value == null){
            return true;
        }
        return "男".equals(value) || "女".equals(value);
    }
}

@Data
public class UserDTO {
    @NotNull(message = "id不能为空")
    private Integer id;
    @NotBlank(message = "姓名不能为空")
    private String name;
    @NotNull(message = "年龄不能为空")
    private Integer age;
    @NotNull(message = "版本不能为空")
    private Integer version;
    @Sex
    private String sex;
}