spring-boot项目bug总结

1、项目启动的时候，找不到mapper文件

Description:

Field stuMapper in com.zb.service.impl.StuServiceImpl required a bean of type 'com.zb.mapper.StuMapper' 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.zb.mapper.StuMapper' in your configuration.

原因是：mapper没有注入到容器中

解决办法是：在启动文件里，添加@MapperScan(basePackages = "com.zb.mapper")，basePackages 是mapper所在的文件夹

@SpringBootApplication
@MapperScan(basePackages = "com.zb.mapper")
public class Application {

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

 2、

@Autowired
private StuMapper stuMapper; 会出现红色的下划线
解决办法：