P1-6：修改springboot启动类

打开启动类：

添加注解：

第8行为新增注解

package com.dszh.demo2;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.dszh.demo2.mapper")
public class Demo2Application {

    public static void main(String[] args) {
        SpringApplication.run(Demo2Application.class, args);
    }

}