Spring---Spring Aware
1、概述
1.1、Spring中的 所有Bean 对Spring容器的存在 是没有意识的(即你可以将容器换成别的容器,这样使用容器与Bean之间的耦合度很低);
但在实际项目中,不可避免的要用到Spring容器本身的功能资源,这时Bean必须意识到Spring容器的存在,才能调用Spring提供的资源,这就是Spring Aware;
(Spring Aware本身就是Spring设计用来框架内部使用的,若使用了Spring Aware,你的Bean将会与Spring框架耦合)
1.2、案例
package com.an.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; /** * @description: * @author: anpeiyong * @date: Created in 2019/11/19 17:27 * @since: */ @Configuration @ComponentScan(value = "com.an") public class AwareConfig { }
package com.an.aware; import org.apache.commons.io.IOUtils; import org.springframework.beans.factory.BeanNameAware; import org.springframework.context.ResourceLoaderAware; import org.springframework.core.io.Resource; import org.springframework.core.io.ResourceLoader; import org.springframework.stereotype.Component; /** * @description: 实现BeanNameAware,ResourceLoaderAware接口,获得Bean名称服务、资源加载服务 * @author: anpeiyong * @date: Created in 2019/11/19 17:20 * @since: */ @Component public class AwareService implements BeanNameAware, ResourceLoaderAware { private String beanName; private ResourceLoader resourceLoader; @Override public void setBeanName(String beanName) { this.beanName=beanName; } @Override public void setResourceLoader(ResourceLoader resourceLoader) { this.resourceLoader=resourceLoader; } public void outputResult(){ System.out.println("BeanName:"+beanName); Resource resource =resourceLoader.getResource("classpath:test.properties"); try { System.out.println("ResourceLoader加载的文件内容:"); System.out.println(IOUtils.toString(resource.getInputStream())); }catch (Exception e){ e.printStackTrace(); } } }
package com.an.main; import com.an.aware.AwareService; import com.an.config.AwareConfig; import org.springframework.context.annotation.AnnotationConfigApplicationContext; /** * @description: * @author: anpeiyong * @date: Created in 2019/11/19 17:28 * @since: */ public class AwareMainTest { public static void main(String[] args) { AnnotationConfigApplicationContext annotationConfigApplicationContext=new AnnotationConfigApplicationContext(AwareConfig.class); AwareService awareService=annotationConfigApplicationContext.getBean(AwareService.class); awareService.outputResult(); annotationConfigApplicationContext.close(); } }
结果:
ResourceLoader加载的文件内容:
book.name=jackson
book.author=rose