import lombok.Data;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import java.util.List;
/**
 * @Description TODO
 * @Author liqinglong
 * @DateTime 2024-04-30 11:02
 * @Version 1.0
 */
@Data
public class User {
    @NotBlank(message = "姓名不為空")
    private String userName;
    @NotNull(message = "年齡不能為空")
    private Integer age;
    @NotEmpty(message = "權(quán)限列表不能空")
    private List<String> rolerList;
}

import com.ruoyi.common.exception.ServiceException;
import org.apache.commons.collections.CollectionUtils;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
/**
 * @Description TODO
 * @Author liqinglong
 * @DateTime 2024-04-30 11:07
 * @Version 1.0
 */
public class ValidTest {
    public static void main(String[] args) {
        // Bean 驗(yàn)證器
        ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
        Validator validator = vf.getValidator();
        User user = new User();
        //姓名為空格或制表符
        user.setUserName("                      ");
        //年齡為null
        user.setAge(null);
        //權(quán)限集合的長(zhǎng)度為0
        List<String> roles = new ArrayList<>();
        user.setRolerList(roles);
        // 校驗(yàn)的業(yè)務(wù)對(duì)象：user，Bean 類(lèi)型：User
        Set<ConstraintViolation<User>> checkSet = validator.validate(user);
        if (CollectionUtils.isNotEmpty(checkSet)) {
            // Bean驗(yàn)證不通過(guò)
            throw new ServiceException(checkSet.stream().map(ConstraintViolation::getMessage).collect(Collectors.joining("，")));
        }
    }
}