Fix：Skipping MapperFactoryBean with name ‘xxxMapper' mapperInterface

解决Spring Boot应用整合Mybatis启动输出警告日志：

[main] o.m.s.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'channelMapper' and 'io.github.yidasanqian.dao.ChannelMapper' mapperInterface. Bean already defined with the same name! 

这是由于mybatis-spring-boot-starter 依赖的自动配置导致的：

    org.mybatis.spring.boot
    mybatis-spring-boot-starter
    1.3.2

只需要在应用启动类加上注解 @MapperScan 即可，

@MapperScan({"io.github.yidasanqian.dao"})
public class ChannelApplication extends ProcessorApplication {
    public static void main(String[] args) {
        SpringApplication.run(ChannelApplication.class, args);
    }
}

重要的是要指定扫描的mapper接口包路径，上面表示扫描包为io.github.yidasanqian.dao下的所有mapper接口定义。