526互联

Bean无法注入问题 NoSuchBeanDefinitionException: No qualifying bean of type 'Service.UserService' available: expected at least 1 bean which qualifies as autowire candidate

发布时间 2024-01-02 10:58:13作者: 老白_White

运行@Test时 UserService 无法完成注入

@SpringBootTest//自动创建Spring上下文环境
class MybatisPlusApplicationTests {
    @Resource
    private UserService userService;

    @Test
    void userServiceTest() {
        int count = userService.count();
        System.out.println("总记录数：" + count);
    }
}

发现是由于 @ComponentScan("Service")注解遗漏导致扫描不到Bean对象
@SpringBootApplication
@MapperScan("Mapper") //填要搜索的包名
@ComponentScan("Service")
public class MybatisPlusApplication {

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

}