自动装配Aware注入Spring底层组件&原理

Z时代
2024-01-10
分类：综合

23、自动装配-Aware注入Spring底层组件&原理

Aware 接口，提供了类似回调函数的功能

自定义组件想要使用Spring 容器底层的一些组件（Application Context，Bean Factory）;自定义组件需要实现xxxAware接口；在创建对象的时候，会调用接口规定的方法注入相关组件

package org.springframework.beans.factory;
public interface Aware {}

23.1 ApplicationContextAware 自动注入IOC容器

package org.springframework.context;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.Aware;
public interface ApplicationContextAware extends Aware {
    void setApplicationContext(ApplicationContext applicationContext) throws BeansException;
}

23.2 ApplicationEventPublisherAware 注入事件派发器

package org.springframework.context;
import org.springframework.beans.factory.Aware;
public interface ApplicationEventPublisherAware extends Aware {
    void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher);}

23.3 BeanClassLoaderAware 类加载器

package org.springframework.beans.factory;
public interface BeanClassLoaderAware extends Aware {
    void setBeanClassLoader(ClassLoader classLoader);}

23.4 BeanFactoryAware Bean工厂

package org.springframework.beans.factory;
import org.springframework.beans.BeansException;
public interface BeanFactoryAware extends Aware {
    void setBeanFactory(BeanFactory beanFactory) throws BeansException;}

23.5 BeanNameAware Bean名字

package org.springframework.beans.factory;
public interface BeanNameAware extends Aware {
    void setBeanName(String name);}

23.6 EmbeddedValueResolverAware Embedded值解析器

package org.springframework.context;
import org.springframework.beans.factory.Aware;
import org.springframework.util.StringValueResolver;
public interface EmbeddedValueResolverAware extends Aware {
    void setEmbeddedValueResolver(StringValueResolver resolver);}

23.7 EnvironmentAware 环境

package org.springframework.context;
import org.springframework.beans.factory.Aware;
import org.springframework.core.env.Environment;
public interface EnvironmentAware extends Aware {
    void setEnvironment(Environment environment);
}

23.8 ImportAware 导入相关的

package org.springframework.context.annotation;
import org.springframework.beans.factory.Aware;
import org.springframework.core.type.AnnotationMetadata;
public interface ImportAware extends Aware {
    void setImportMetadata(AnnotationMetadata importMetadata);
}

23.9 LoadTimeWeaverAware 导入相关的

package org.springframework.context.weaving;
import org.springframework.beans.factory.Aware;
import org.springframework.instrument.classloading.LoadTimeWeaver;
public interface LoadTimeWeaverAware extends Aware {
    void setLoadTimeWeaver(LoadTimeWeaver loadTimeWeaver);
}

23.10 MessageSourceAware 国际化

package org.springframework.context;
import org.springframework.beans.factory.Aware;
public interface MessageSourceAware extends Aware {
    void setMessageSource(MessageSource messageSource);
}

23.11 NotificationPublisherAware 发送通知的支持

package org.springframework.jmx.export.notification;
import org.springframework.beans.factory.Aware;
public interface NotificationPublisherAware extends Aware {
    void setNotificationPublisher(NotificationPublisher notificationPublisher);
}

23.12 ResourceLoaderAware 资源加载器

package org.springframework.context;
import org.springframework.beans.factory.Aware;
import org.springframework.core.io.ResourceLoader;
public interface ResourceLoaderAware extends Aware {
    void setResourceLoader(ResourceLoader resourceLoader);
}

23.13 测试用例

package com.hw.springannotation.beans;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.EmbeddedValueResolverAware;
import org.springframework.stereotype.Component;
import org.springframework.util.StringValueResolver;
/**
 * @Description TODO
 * @Author hw
 * @Date 2018/11/28 15:44
 * @Version 1.0
 */
@Component
public class Red implements ApplicationContextAware, BeanNameAware, EmbeddedValueResolverAware {
    private ApplicationContext applicationContext;
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        System.out.println("传入的IOC " + applicationContext);
        this.applicationContext = applicationContext;
    }
    public void setBeanName(String name) {
        System.out.println("当前bean的名字" + name);
    }
    public void setEmbeddedValueResolver(StringValueResolver resolver) {
        String value = resolver.resolveStringValue("你好${os.name} 我是#{20*20}");
        System.out.println("解析的字符串：" + value);
    }
}