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

 

posted @ 2019-10-30 14:38  程序生(Codey)  阅读(375)  评论(0编辑  收藏  举报