<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.1.2</version>
</dependency>
②在mybatis-config.xml文件中配置插件
<plugins>
<plugin interceptor="tk.mybatis.mapper.mapperhelper.MapperInterceptor">
<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
</plugin>
</plugins>
③定义mapper继承Mpaaer类，然后UserMapper就有基本的CRUD方法，如下：
public interface UserMapper extends Mapper<User> {}
