@Component和@Configuration都可以作為配置類但兩者是有區(qū)別的，上代碼

@Configuration
public class MyTestConfig {

    @Bean
    public People p(){
        People p= new People ();
        p.setCar(car());
        return p;
    }

    @Bean
    public Car car(){
        Car car = new Car();
        car.setId(1);
        car.setName("car");
        return car;
    }
}

測試代碼如下

@RunWith(SpringRunner.class)
@SpringBootTest
public class TestApplication {

    @Autowired
    private Car car;

    @Autowired
    private People p;

    @Test
    public void contextLoads() {
        boolean b= p.getCar() == car;
        System.out.println(result ? "同一個car" : "不同的car");
    }

}

打印結(jié)果如下：
同一個car

替換為Component后的打印結(jié)果：

不同的car