springboot+mybatis的实现以及 Property ‘sqlSessionFactory’ or ‘sqlSessionTemplate’ are required问题的解决

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废话不多说，直接上步骤
前期准备
建表：

 CREATE TABLE book(id int primary key auto_increment ,bookId bigint,bookName varchar(200))

插入数据：

 insert into book values(32165489,springboot_base);

1、先用idea创建一个springboot项目，创建步骤如下

**

这个步骤一定要注意了，我就是在这里被坑了大发了，这里如果勾选了mybatis，那么按照正常的配置写完后，运行会报错：Property ‘sqlSessionFactory’ or ‘sqlSessionTemplate’ are required，切记不能勾选

**

2、pom.xml添加如下依赖

 <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.0</version>
        </dependency>

3、编写mapper，此处可以用@Mapper，也可以在 application处全局配置，比如下面一个步骤

//@Mapper
@Repository
public interface BookMapper {

    @Select("select * from book where bookId=#{bookId}")
    Book findBookById(@Param("bookId") Long bookId);

}

4、application添加@MapperScan注解，路径为mapper接口所在的包路径

@SpringBootApplication
@MapperScan(basePackages = "com.mybatis1.demo.dao")
public class DemoApplication {

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

5、新建application.yml文件，配置数据源

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/springbootdb
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver

6、编写book的model类

public class Book {
    private Integer id;
    private Long bookId;
    private String bookName;
    set,get方法就不贴了
}

7、编写test类

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

    @Test
    public void contextLoads() {
    }

    @Autowired
    private BookMapper bookMapper;
    @Test
    public void getBookById(){
        System.out.println(bookMapper.findBookById(654645L));
    }
}

然后run这getBookById的方法，成功运行