ApplicationContext的事件机制是观察者设计模式的实现，通过ApplicationEvent类和ApplicationListerner接口来实现。
1. 创建EmailEvent
public class EmailEvent extends ApplicationEvent{ private String address; private String text; public EmailEvent(Object source) { super(source); } public EmailEvent(Object source, String address, String text) { super(source); this.address = address; this.text = text; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getText() { return text; } public void setText(String text) { this.text = text; } }
2. 创建EmailNotifier类
public class EmailNotifier implements ApplicationListener{ @Override public void onApplicationEvent(ApplicationEvent event) { if (event instanceof EmailEvent) { EmailEvent emailEvent = (EmailEvent)event; System.out.println("邮件接收地址:" + emailEvent.getAddress()); System.out.println("邮件正文: " + emailEvent.getText()); } } }
3. 创建容器配置文件 beans_mail.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> <bean id="emailNotifier" class="com.tutorialspoint.EmailNotifier"> </bean> </beans>
4. 测试
ApplicationContext context = new ClassPathXmlApplicationContext("beans_mail.xml"); EmailEvent emailEvent = new EmailEvent("hello","spring@163.com","this is test"); context.publishEvent(emailEvent);
5. 输出结果
六月 01, 2016 5:13:10 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@9b6220: startup date [Wed Jun 01 17:13:10 CST 2016]; root of context hierarchy 六月 01, 2016 5:13:10 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [beans_mail.xml] 邮件接收地址:spring@163.com 邮件正文: this is test
本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/p/5550386.html，如需转载请自行联系原作者
