mybatisplus填充公共字段MetaObjectHandler后不生效解决方式

news2025/10/31 0:38:42

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * 拦截处理公共字段
 */
@Primary
@Component
public class CommonColumnHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        if(metaObject.getOriginalObject() instanceof CommonBean){
            String userId = SessionUtil.currentUserId();
            CommonBean bean = (CommonBean) metaObject.getOriginalObject();
            bean.setCreateTime(new Date());
            bean.setUpdateTime(bean.getCreateTime());
            if(StringUtils.isNotBlank(userId)){
                bean.setCreateUser(userId);
                bean.setUpdateUser(userId);
            }
            if(StringUtils.isBlank(bean.getId())){
                bean.setId(StringTool.uuid());
            }
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        if(metaObject.getOriginalObject() instanceof CommonBean){
            CommonBean bean = (CommonBean) metaObject.getOriginalObject();
            bean.setUpdateTime(new Date());
            String userId = SessionUtil.currentUserId();
            if(StringUtils.isNotBlank(userId)){
                bean.setUpdateUser(userId);
            }
        }
    }
}

上述实现类，程序根本就没有进去，保存方法如下

整个上面的写法只更新了实体的两个属性，所以没有触发实现类的填充代码，下面是整个实体的更新，就能够进入实现类。