Spring注解系列二十二：自动装配-Aware接口

曾经终败给现在 2022-01-23 04:45 255阅读 0赞

自定义组件想要使用Spring容器底层的一些组件（ApplicationContext，BeanFactory，xxx）；自定义组件实现xxxAware；在创建对象的时候，会调用接口规定的方法注入相关组件；Aware；把Spring底层一些组件注入到自定义的Bean中。  
xxxAware：功能使用xxxProcessor；如：ApplicationContextAware==》ApplicationContextAwareProcessor

@Component
    public class Red implements ApplicationContextAware,BeanNameAware,EmbeddedValueResolverAware {
    
        private ApplicationContext applicationContext;
    
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            // TODO Auto-generated method stub
            System.out.println("传入的ioc："+applicationContext);
            this.applicationContext = applicationContext;
        }
    
        @Override
        public void setBeanName(String name) {
            // TODO Auto-generated method stub
            System.out.println("当前bean的名字："+name);
        }
    
        @Override
        public void setEmbeddedValueResolver(StringValueResolver resolver) {
            // TODO Auto-generated method stub
            String resolveStringValue = resolver.resolveStringValue("你好 ${os.name} 我是 #{20*18}");
            System.out.println("解析的字符串："+resolveStringValue);
        }
    
    }

测试：

@Test
    public void test01(){
    	AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConifgOfAutowired.class);
    	System.out.println(applicationContext);
    }

![在这里插入图片描述][2019060214143335.png]

[2019060214143335.png]: /images/20220123/870eb2f7865c4b41b6385cc5428a50c9.png