spring中ApplicationListener的用法

1、实现ApplicationListener接口，并重写onApplicationEvent方法

@Component
public class RSAKeyInitListener implements ApplicationListener<ContextRefreshedEvent> {

	@Autowired
	BaseAppConfigDao baseAppConfigDao;

	@Override
	public void onApplicationEvent(ContextRefreshedEvent event) {
		//具体操作
        }
}

2、创建spring的应用上下文（ApplicationContext.xml），并配置注解扫描

<context:component-scan base-package="com.xxx.xxx.facex.listener" />

3、配置web.xml

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

<!-- 也可以与context-param标签一起使用 -->

　　 <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:spring.xml
        </param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>