ConstraintValidator类如何实现自定义注解校验前端传参

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import javax.validation.Constraint;
import javax.validation.Payload;
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Constraint(
        validatedBy = {IllegalNumberValidator.class}
)
public @interface IllegalNumber {
    /**
     * 允许前端取的几个值
     * 
     */
    int[] acceptValues();
    /**
     * 标识此字段是否为必选项
     * 
     */
    boolean required() default true;
 
    /**
     * 标识此字段是否为必选项
     * 
     */
    String message() default "数字不合法,不在要求的取值范围之内";
 
    /**
     * 标识要校验的值所属组，这个后面详细解释
     * 
     */
    Class<?>[] groups() default {};
    
    /**
     * 这个字段一般不需要我们关注
     * 
     */
    Class<? extends Payload>[] payload() default {};
}

import com.google.common.collect.Lists;
import org.springframework.util.StringUtils;
import java.util.List;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class IllegalNumberValidator implements ConstraintValidator<IllegalNumber, Integer> {
    private final List<Integer> valueList = Lists.newArrayList();
    private boolean require = false;
    @Override
    public void initialize(IllegalNumber constraintAnnotation) {
        require = constraintAnnotation.required();
        int[] ints = constraintAnnotation.acceptValues();
        for (int anInt : ints) {
            valueList.add(anInt);
        }
    }
    @Override
    public boolean isValid(Integer number, ConstraintValidatorContext constraintValidatorContext) {
        // 如果是必选的话,假设为我们传递的参数为空那肯定不行
        if (require) {
            if (number == null) {
                return false;
            }
            return valueList.contains(number);
        } else {
            // 如果不为必选参数，为空返回true，不为空还是得校验
            if (StringUtils.isEmpty(number)) {
                return true;
            } else {
                return valueList.contains(number);
            }
        }
    }
}

import lombok.Data;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.NotNull;
@Data
public class TestVO {
    @NotNull
    @IllegalNumber(acceptValues = {0, 1,2},required = true,message = "请正确取值")
    private Integer number;
    @NotNull
    @Length(min = 1)
    private String password;
}

    /**
     * 测试自定义注解
     *
     * @param vo json将会映射的实体
     * @return 默认信息
     */
    @PostMapping(value = "/v1.0/test2", name = "测试自定义注解")
    public String test2(@Valid @RequestBody TestVO vo) {
        log.info("get vo success , detail message is:{}", vo);
        return RETURN_MESSAGE;
    }

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import java.util.Objects;
import javax.validation.ConstraintViolationException;
@ControllerAdvice
public class RestResponseEntityExceptionHandler {
    private static final Logger LOG = LoggerFactory.getLogger(RestResponseEntityExceptionHandler.class);
    @Autowired
    private ApplicationContext applicationContext;
    @ExceptionHandler({ConstraintViolationException.class})
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ResponseBody
    public String handleConstraintViolationException(ConstraintViolationException e) {
        LOG.info("ConstraintViolationException intercept success:{}", e.getMessage());
        return e.getMessage();
    }
    @ExceptionHandler({MethodArgumentNotValidException.class})
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ResponseBody
    public String handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
        LOG.info("MethodArgumentNotValidException intercept success:{}", e.getMessage());
        return Objects.requireNonNull(e.getBindingResult().getFieldError()).getDefaultMessage();
    }
}

public interface Group1 {
}

public interface Group2 {
}

@Data
public class TestVO {
    @NotNull
    @IllegalNumber(acceptValues = {0, 1,2},required = true,message = "请正确取值",groups = Group1.class)
    private Integer number;
    @NotNull
    @IllegalNumber(acceptValues = {0, 1,2},required = true,message = "请正确取值ha",groups = Group2.class)
    private Integer number2;
    @NotNull
    @Length(min = 1)
    private String password; 
}