Spring中ApplicationContextAware接口用法
加载Spring配置文件时，如果Spring配置文件中所定义的Bean类，如果该类实现了ApplicationContextAware接口，那么在加载Spring配置文件时，会自动调用ApplicationContextAware接口中的
public void setApplicationContext(ApplicationContext context) throws BeansException
方法，并且自动可获得ApplicationContext 对象。前提必须在Spring配置文件中指定改类。
一个Demo程序如下：
Spring配置文件中配置：
<bean id="springContext" class="com.shine.spring.SpringContextHelper"></bean>
/**
* ApplicationContext的帮助类
* 自动装载ApplicationContext
*
* @author ChenST
* @create 2010-6-24
*
*/
public class SpringContextHelper implements ApplicationContextAware {
private static ApplicationContext context ;
/*
* 注入ApplicationContext
*/
@Override
public void setApplicationContext(ApplicationContext context)
throws BeansException {
//在加载Spring时自动获得context
SpringContextHelper.context = context;
System.out.println(SpringContextHelper.context);
}
public static Object getBean(String beanName){
return context.getBean(beanName);
}
}
2022年9月26日 05:40
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