javax.validation分组校验(简短版)

javax.validation注解校验:我们使用的实体,有时候需要全部校验它的字段,有时候其他地方使用只需要校验它的部分字段。

解决办法:使用分组校验。

public class Group {
    public interface AddGroup{}

    public interface UpdateGroup{}
}

 

/**
     * 用户名
     */
    @NotBlank(message = "用户名不能为空!",groups = Group.AddGroup.class)
    private String userName;

    /**
     * 密码
     */
    @NotBlank(message = "密码不能为空!")
    private String password;

1.新增的时候我需要全部校验字段(userName,password都校验):

@RequestBody @Validated({Default.class, Group.AddGroup.class}) UserEntity userEntity, BindingResult bindingResult

或者

private BaseResponse validateParam(UserEntity userEntity) {
        List<String> validateError = ValidationUtil.validate(userEntity, Default.class, Group.AddGroup.class);//Default.class, Group.AddGroup.class
        if (validateError != null && validateError.size() > 0) { // validateError.get(0)
            return BaseResponse.failedCustom(validateError.get(0)).build();
        }
        return BaseResponse.successCustom().build();
    }

 ValidationUtil:

import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import javax.xml.bind.ValidationException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
* @description: 校验工具类
* @author liuyachao
* @date 2021/9/18 16:38
*/
public class ValidationUtil {
    private static Validator validator;

    static {
       ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
       validator = vf.getValidator();
    }
    /**
      * javax.validation注解校验
      * @throws ValidationException
      * @throws ValidationException
      * @Description: 校验方法
      * @param t 将要校验的对象
      * @throws ValidationException
      * void
      * @throws
     */
    public static <T> List<String> validate(T t){
        return validate(t,null);
    }

    /**
     * javax.validation注解校验,分组校验
     * @param t 校验实体
     * @param groups 校验分组
     * @return java.util.List<java.lang.String>
     */
    public static <T> List<String> validate(T t, Class<?>... groups){
        Set<ConstraintViolation<T>> set;
        if(groups != null && groups.length > 0){
            set = validator.validate(t,groups);
        }else{
            set = validator.validate(t);
        }
        List<String> validateError = new ArrayList<>();
        if(set.size()>0){
            for(ConstraintViolation<T> val : set){
                validateError.add(val.getMessage());
            }
        }
        return validateError;
    }
}

 

2.其他地方使用我只需要校验部分字段(只校验password字段,属于默认分组Default):

@RequestBody @Validated({Default.class}) UserEntity userEntity, BindingResult bindingResult

或者

private BaseResponse validateParam(UserEntity userEntity) {
        List<String> validateError = ValidationUtil.validate(userEntity, Default.class);//Default.class, Group.AddGroup.class
        if (validateError != null && validateError.size() > 0) { // validateError.get(0)
            return BaseResponse.failedCustom(validateError.get(0)).build();
        }
        return BaseResponse.successCustom().build();
    }

3.只校验userName字段,属于分组AddGroup:

@RequestBody @Validated({Group.AddGroup.class}) UserEntity userEntity, BindingResult bindingResult

或者

private BaseResponse validateParam(UserEntity userEntity) {
        List<String> validateError = ValidationUtil.validate(userEntity,Group.AddGroup.class);//Default.class, Group.AddGroup.class
        if (validateError != null && validateError.size() > 0) { // validateError.get(0)
            return BaseResponse.failedCustom(validateError.get(0)).build();
        }
        return BaseResponse.successCustom().build();
    }

userName属于AddGroup分组,password属于Default默认分组(没有添加自定义分组的字段都默认为Default分组)。它们属于不同分组。校验的时候选择不同分组,只会校验选择的分组的字段。

详解版参考:https://www.cnblogs.com/super-chao/p/15314566.html

 

ValidationUtil
posted @ 2021-09-20 17:02  super超人  阅读(1586)  评论(4编辑  收藏  举报