SpringBoot底层注解超详细介绍

@Configuration(proxyBeanMethods = true) // 配置类 == 配置文件
public class MyConfig {
}

		// 配置类本身也是一个组件
        MyConfig bean = run.getBean(MyConfig.class);
        System.out.println(bean);
        run.getBean("user01", User.class);
        run.getBean("tom", Pet.class);
        System.out.println("用户的宠物是不是容器中的宠物" + (user01.getPet() == tom01));

    @Bean // 给容器中添加组件，方法名作为组件id, 返回类型是组件类型 , 返回的值是组件在容器中的实例
    public User user01(){
        User zangsan = new User("zangsan", 18);
        zangsan.setPet(tomcatPet());
        return zangsan;
    }

		ConfigurableApplicationContext run = SpringApplication.run(MainApplication.class, args);
        // 查看容器里的组件
        String[] names = run.getBeanDefinitionNames();
        for(String s: names){
            System.out.println(s);
        }

@Import({User.class, DBHelper.class}) // 给容器中自动创建出这两个类型的组件
@Configuration // 配置类 == 配置文件
public class MyConfig {
}

DBHelper bean1 = run.getBean(DBHelper.class);

    @ConditionalOnBean(name = "tom") // 表示有 tom 组件才能注册 user01 组件
    @Bean // 给容器中添加组件，方法名作为组件id, 返回类型是组件类型 , 返回的值是组件在容器中的实例
    public User user01(){
        User zangsan = new User("zangsan", 18);
        zangsan.setPet(tomcatPet());
        return zangsan;
    }

        System.out.println("容器中是否含有宠物组件" + run.containsBean("tom"));
        System.out.println("容器中是否含有用户组件" + run.containsBean("user01"));

@Component // 将组件加到容器中
@ConfigurationProperties(prefix = "mycar") // 配置属性名

// 功能一：开启Car的属性配置
// 功能二：把指定的组件导入容器中
@EnableConfigurationProperties(Car.class)

    @Autowired
    Car car;
    @RequestMapping("/car")
    public  Car car(){
        System.out.println(car);
        return  car;
    }

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration  // 当前是一个配置类
@EnableAutoConfiguration  
@ComponentScan( // 指定扫描那些Spring注解
    excludeFilters = {@Filter(
    type = FilterType.CUSTOM,
    classes = {TypeExcludeFilter.class}
), @Filter(
    type = FilterType.CUSTOM,
    classes = {AutoConfigurationExcludeFilter.class}
)}
)

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@AutoConfigurationPackage //——@Import({AutoConfigurationPackages.Registrar.class})
@Import({AutoConfigurationImportSelector.class})