Spring 中 Bean 中通过实现 Aware 接口的方式可以自动注入哪些资源

╰+攻爆jí腚メ 2022-03-20 11:26 152阅读 0赞

package sping.analysis.aware;
    
    import java.util.Locale;
    
    import org.springframework.beans.BeansException;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.context.ApplicationEventPublisher;
    import org.springframework.context.ApplicationEventPublisherAware;
    import org.springframework.context.EmbeddedValueResolverAware;
    import org.springframework.context.EnvironmentAware;
    import org.springframework.context.MessageSource;
    import org.springframework.context.MessageSourceAware;
    import org.springframework.context.ResourceLoaderAware;
    import org.springframework.core.env.Environment;
    import org.springframework.core.io.ResourceLoader;
    import org.springframework.stereotype.Component;
    import org.springframework.util.StringValueResolver;
    
    /** * Spring 中 Bean 中可以自动注入哪些资源，通过实现 Aware 接口的方式实现的 * * @author slHuang * @since 2019-02-08 */
    @Component
    public class MyBeanAwareByImpl implements ApplicationContextAware, EnvironmentAware, EmbeddedValueResolverAware,
    	ResourceLoaderAware, ApplicationEventPublisherAware, MessageSourceAware{ 
    
    	private ApplicationContext applicationContext;
    	private Environment environment;
    	private StringValueResolver resolver;
    	private ResourceLoader resourceLoader;
    	private ApplicationEventPublisher applicationEventPublisher;
    	private MessageSource messageSource;
    	
    	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { 
    		this.applicationContext = applicationContext;
    	}
    
    	public void useApplicationContext() { 
    		System.out.println(this.applicationContext.containsBean("myBeanAwareByImpl"));
    	}
    
    	public void setEnvironment(Environment environment) { 
    		this.environment = environment;
    	}
    	
    	public void useEnvironment() { 
    		System.out.println(this.environment.getProperty("java.home"));
    	}
    
    	public void setEmbeddedValueResolver(StringValueResolver resolver) { 
    		this.resolver = resolver;
    	}
    	
    	public void useResolver() { 
    		System.out.println(this.resolver.resolveStringValue("${java.runtime.version}"));
    	}
    
    	public void setResourceLoader(ResourceLoader resourceLoader) { 
    		this.resourceLoader = resourceLoader;
    	}
    	
    	public void useResourceLoader() { 
    		System.out.println(this.resourceLoader.getResource("classpath:src/main/resources/application.xml"));
    	}
    
    	public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) { 
    		this.applicationEventPublisher = applicationEventPublisher;
    	}
    	
    	public void useApplicationEventPublisher() { 
    		System.out.println(this.applicationEventPublisher);
    	}
    
    	public void setMessageSource(MessageSource messageSource) { 
    		this.messageSource = messageSource;
    	}
    	
    	public void useMessageSource() { 
    		System.out.println(this.messageSource.getMessage("Message", null, "not exist", Locale.JAPAN));
    	}
    }