一、引入pom
1.引入jdbc-starter,mybatis-starter,mysql-connector
![](https://img-blog.csdnimg.cn/20200430192023816.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
二、改yml
yml的配置如下:千万注意那块儿mapper的映射路径的后缀必须是Mapper.xml
![](https://img-blog.csdnimg.cn/20200430192035286.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
三、写业务代码
1.在springboot的启动类的上边添加扫描mapper的注解
![](https://img-blog.csdnimg.cn/20200430192048736.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
2.Mapper层------classpath:mapping/*Mapper.xml
![](https://img-blog.csdnimg.cn/20200430192116742.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
3.Dao层---------com.example.demo.mapper.UserMapper
![](https://img-blog.csdnimg.cn/20200430192140126.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
4.service层
![](https://img-blog.csdnimg.cn/20200430192200409.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
5.controller层
![](https://img-blog.csdnimg.cn/20200430192212816.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXh3MQ==,size_16,color_FFFFFF,t_70)
四、测试
![](https://img-blog.csdnimg.cn/20200430192233130.png)
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