AnnotationConfigApplicationContext applicationContext
    = new AnnotationConfigApplicationContext(AppConfig.class);

public AnnotationConfigApplicationContext(Class<?>... annotatedClasses) {
    this();
    //根據(jù)注解配置類注冊(cè)Bean
    register(annotatedClasses);
    //刷新容器
    refresh();
}

public AnnotationConfigApplicationContext(String... basePackages) {
    this();
    //根據(jù)包路徑配置掃描Bean
    scan(basePackages);
    //刷新容器
    refresh();
}

public void register(Class<?>... annotatedClasses) {
    Assert.notEmpty(annotatedClasses, "At least one annotated class must be specified");
    this.reader.register(annotatedClasses);
}

<T> void doRegisterBean(...) {
    //將注解配置類信息轉(zhuǎn)換成一種BeanDefinition
    AnnotatedGenericBeanDefinition abd = new
    AnnotatedGenericBeanDefinition(annotatedClass);
    …
    //獲取Bean的作用域元數(shù)據(jù)，解析Bean作用域
    ScopeMetadata scopeMetadata =
    this.scopeMetadataResolver.resolveScopeMetadata(abd);

    //將Bean的作用域?qū)懟谺eanDefinition
    abd.setScope(scopeMetadata.getScopeName());

    //生成beanName
    String beanName = (name != null ? name :
    this.beanNameGenerator.generateBeanName(abd, this.registry));

    //解析AnnotatedBeanDefinitionReader中的@Lazy、@Primary等注解
    AnnotationConfigUtils.processCommonDefinitionAnnotations(abd);

    //處理@Qualifier注解
    if (qualifiers != null) {
        for (Class<? extends Annotation> qualifier : qualifiers) {
            if (Primary.class == qualifier) {
                // 如果設(shè)置了@Primary注解，則設(shè)置當(dāng)前Bean為首選Bean
                abd.setPrimary(true);
            }
            else if (Lazy.class == qualifier) {
                //如果設(shè)置了@Lazy注解，則設(shè)置當(dāng)前Bean為延遲加載模式
                abd.setLazyInit(true);
            }
            else {
                //其他注解，則添加到BeanDefinition中
                abd.addQualifier(new AutowireCandidateQualifier(qualifier));
            }
        }
    }
    …
    //注冊(cè)Bean對(duì)象
    BeanDefinitionReaderUtils.registerBeanDefinition(definitionHolder, this.registry);
}