mybatis,mybatis-generator,mybatis-plus手记
mybatis
doc:https://mybatis.org/mybatis-3/zh/java-api.html#directoryStructure
使用Mybatis进行连表查询、left join:https://blog.csdn.net/jinzhencs/article/details/51980518?_t_t_t=0.008867029254340464
mybatis-generator
使用Mybatis-Generator自动生成Dao、model和mapper.xml相关文件:https://blog.csdn.net/u014639561/article/details/52608582
使用mybatis-generator生成自动生成mapper.java和mapper.xml等文件:https://bbs.csdn.net/topics/392320271?page=1
mybatis-plus
项目源码:https://gitee.com/baomidou/mybatis-plus
https://github.com/baomidou/mybatis-plus
文档:https://mybatis.plus/guide/
使用入门:https://www.jianshu.com/p/ceb1df475021
问题处理:
1.查询数据库中Date类型自动转化为时间戳
解决方式:在实体类中的属性上加上注解@JSONField
@JSONField(format ="yyyy-MM-dd HH:mm:ss") private Date gmtModified;
2.selectList in BaseMapper cannot be applied to
List<User> smsTpls = userMapper.selectList( new EntityWrapper<User>() .eq("gender",0));
由于mybatis-plus新版本改用QueryWrapper查询生成器对象
所以改为
List<User> smsTpls = userMapper.selectList( new QueryWrapper<User>() .eq("gender",0));
github解答:https://github.com/baomidou/mybatis-plus/issues/1007 https://github.com/baomidou/mybatis-plus/issues/1659