spring boot 使用hibernate validator 验证service

不在controller中验证，而是在service中验证。

spring boot 默认使用的就是hibernate validator，存在于pom的spring-boot-starter-web中。

1、Validators

import java.util.List;
import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Validator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
/**
 * 通用验证方法
 */
@Service
public class Validators {
    @Autowired
    private Validator validator;
    
    public <T> String valid(T obj) {
        return this.valid(obj,null);
    }
    public <T> String valid(T obj,Class group) {
        Set<ConstraintViolation<T>> violations = null;
        if (group == null) {
            violations = validator.validate(obj);
        } else {
            violations = validator.validate(obj,group);
        }
        if (!violations.isEmpty()) {
            StringBuilder sb = new StringBuilder();
            for (ConstraintViolation<T> constraintViolation : violations) {
                sb.append("[").append(constraintViolation.getPropertyPath().toString()).append("=");
                sb.append(constraintViolation.getInvalidValue());
                sb.append(",");
                sb.append(constraintViolation.getMessage());
                sb.append("]");
            }
            return sb.toString();
        } else {
            return null;
        }
    }
    public <T> String validList(List<T> objList) {
        return validList(objList,null);
    }
    public <T> String validList(List<T> objList,Class group) {
        if (CollUtil.isEmpty(objList) || objList.size()<=0) {
            return "对象空";
        }
        StringBuilder sb = new StringBuilder();
        String result = "";
        for (int i = 0; i < objList.size(); i++) {
            if (group == null) {
                result = this.valid(objList.get(i));
            } else {
                result = this.valid(objList.get(i),group);
            }
            if (!StrUtil.isBlank(result)) {
                sb.append(result);
            }
        }
        if (!StrUtil.isBlankIfStr(sb)) {
            return sb.toString();
        } else {
            return null;
        }
    }
}

2、entity注解

public class PrjDto extends BaseDtoAndApi {
    @JSONField(name = "name", ordinal = 11)
    @NotBlank(groups = PrjAddInfoReqChecker.class)
    private String name;
        
    @JSONField(name = "mem_list", ordinal = 24)
    @NotEmpty
    List<PrjMemberDto> memList;
}

3、PrjAddInfoReqChecker

public interface PrjAddInfoReqChecker {
}

4、service

    @Autowired
    private Validators validators;
    
    @Transactional(readOnly=false)
    public ReMsg addPrj(PrjAddInfoReq prjAddInfoReq) {
        log.info("接收：{}",JSONObject.toJSONString(prjAddInfoReq,true));
        ReMsg reMsg = null;
        Integer rs = null;
        
        String validResult = validators.valid(prjAddInfoReq,PrjAddInfoReqChecker.class);
        if (!StrUtil.isBlankIfStr(validResult)) {
            reMsg = new ReMsg("999",validResult);
            return reMsg;
        }
        //验证集合中的对象
        String validListResult1 = validators.validList(prjAddInfoReq.getMemList(),PrjAddInfoReqChecker.class);
        if (!StrUtil.isBlankIfStr(validListResult1)) {
            reMsg = new ReMsg("999",validResult);
            return reMsg;
        }
......
}