Mybatis学习demo02-注解开发

爱被打了一巴掌 2022-11-28 00:43 146阅读 0赞

## 新建普通maven项目 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center]

## 把demo01的内容拷贝过来 ##

[Mybatis学习demo01-入门案例][Mybatis_demo01-]

## 删除主文件com ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center 1]

package com.wan.dao;
    
    import com.wan.mybatis.User;
    import org.apache.ibatis.annotations.Select;
    
    import java.util.List;
    
    public interface IUserDao {
        
    //    查询所有操作
    //    使用注解方式查询
        @Select("select * from user")
        List<User> findAll();
    }

修改配置文件中的resource为class

<mappers>
            <mapper class="com.wan.dao.IUserDao"/>
        </mappers>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center 2]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center]: /images/20221124/bfb28fc6947d45808568bbc44ffc4e86.png
[Mybatis_demo01-]: https://blog.csdn.net/weixin_46047285/article/details/108038194
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221124/390eb674c8a945f1afb70c55f3037472.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjA0NzI4NQ_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221124/db93b39e1bbf41e7a046198a216ad506.png