mapper介面

@MapperScan
public interface PeopleMapper {

    @Select("SELECT * FROM people WHERE id = #{id}")
    People findById(@Param("id") int id);

    @Insert("INSERT INTO people(NAME, AGE) VALUES(#{name}, #{age})")
    int insert(People people);

}

pom

    <dependency>
        <groupId
 
>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.0.1</version>
    </dependency>

此時mapper是可以正常使用的
但是將mybatis-spring-boot-starter的版本改為1.1.1或者1.3.0之後，則會報錯

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘demo.repository.Dao’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

錯誤資訊詳見spring boot mybatis的問題(提的問題沒人回答。。後來自己回答了，然後在記錄一下)

然後某一天腦袋一抽，想到會不會是註解問題，然後更換註解為@Mapper
mapper介面

@Mapper
public interface PeopleMapper {

    @Select("SELECT * FROM people WHERE id = #{id}")
    People findById(@Param("id") int id);

    @Insert("INSERT INTO people(NAME, AGE) VALUES(#{name}, #{age})"
 
)
    int insert(People people);

}

pom

    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.1</version>
    </dependency>

發現更換註解後就可照常使用，同測版本1.1.1可用