在yml中配置了mybatis，但是却报错找不到mapper，如下图?

Question

问题

按网上的搜索，配置@Mapper依然报错

Description:

Field tagMapper in com.example.demo.service.TagService required a bean of type 'com.example.demo.mapper.TagMapper' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.example.demo.mapper.TagMapper' in your configuration.


Process finished with exit code 1

代码

github

相关信息

报错信息

controller和service

bean和mapper

Answer 1

一般得加MapperScann告诉容器去扫描哪个包，但是新版本的springboot已经做了默认配置，不加就是扫描启动类所在包以及子路径，代码地址在哪，给你看看

Answer 2

在运行类上添加@MapperScan注解 @MapperScan("com.example.demo.mapper")

@MapperScan("com.example.demo.mapper")
@SpringBootApplication
public class DemoApplication {

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

}

并且在你的Mapper的@Mapper基础上再加上一个@Repository注解

@Repository
@Mapper
public interface TagMapper{
}

这样来把它定义为一个bean注入到Service里