注意两个地方：

1.启动类注解 @ComponentScan(basePackages =“com.qjxs”)

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@ComponentScan(basePackages =“com.qjxs”)
@EnableJpaRepositories(“com.qjxs.repository”)
@EntityScan(“com.qjxs.domain”)
public class QjxsApplication {
public static void main(String[] args) {
SpringApplication.run(QjxsApplication.class, args);
}
}

2.pom引入包为service实现类，而非service