深入浅出Spring事件机制
转载
事件实现依赖ApplicationEvent抽象类和ApplicationListener接口,applicationContext发布（publishEvent）了事件以后，ApplicationListener的onApplicationEvent监听之：
Java代码如下：
01 | package com.uqee.spring.applicationContext; |
03 | import org.apache.commons.logging.Log; |
04 | import org.apache.commons.logging.LogFactory; |
05 | import org.springframework.context.ApplicationEvent; |
07 | public class EmailEvent extends ApplicationEvent |
09 | private String address; |
10 | private String text; |
11 | private String email; |
12 | public String getEmail() |
14 | return email; |
17 | public void setEmail(String email) |
19 | this.email = email; |
22 | private Log logger = LogFactory.getLog(EmailEvent.class); |
24 | public EmailEvent(Object source) |
26 | super(source); |
27 | // TODO Auto-generated constructor stub |
30 | public EmailEvent(String email,String address,String text) |
32 | super(email); |
33 | this.email = email; |
34 | this.address = address; |
35 | this.text = text; |
38 | public void printInfo() |
40 | // System.out.println("Send this Email, address:"+address+" text:"); |
41 | logger.info("Send this Email, address:"+address+" text:"+text); |
47 | private static final long serialVersionUID = 1667085258090884727L; |
01 | package com.uqee.spring.applicationContext; |
03 | import org.springframework.context.ApplicationEvent; |
04 | import org.springframework.context.ApplicationListener; |
06 | public class EmailNotifier implements ApplicationListener |
09 | private String notificationAddress; |
12 | public String getNotificationAddress() |
14 | return notificationAddress; |
18 | public void setNotificationAddress(String notificationAddress) |
20 | this.notificationAddress = notificationAddress; |
25 | public void onApplicationEvent(ApplicationEvent event) |
27 | // TODO Auto-generated method stub |
28 | if(event instanceof EmailEvent) |
30 | //notifier apppriate person |
31 | EmailEvent emailEvent = (EmailEvent)event; |
32 | System.out.println("我已收到通知："+emailEvent.getEmail()+"要发邮件了。。"); |
01 | package com.uqee.spring.applicationContext; |
03 | import java.util.List; |
05 | import org.springframework.beans.BeansException; |
06 | import org.springframework.context.ApplicationContext; |
07 | import org.springframework.context.ApplicationContextAware; |
09 | public class EmailBean implements ApplicationContextAware |
12 | private ApplicationContext ctx = null; |
13 | public ApplicationContext getCtx() |
15 | return ctx; |
18 | private List backList; |
20 | public List getBackList() |
22 | return backList; |
25 | public void setBackList(List backList) |
27 | this.backList = backList; |
31 | public void setApplicationContext(ApplicationContext applicationContext) |
32 | throws BeansException |
34 | // TODO Auto-generated method stub |
35 | this.ctx = applicationContext; |
38 | public void sendEmail(String email,String title,String text) |
40 | if(backList.contains(email)) |
42 | EmailEvent evt = new EmailEvent(email,title, text); |
43 | ctx.publishEvent(evt); |
xml配置如下：
01 | <bean id="emailer" class="com.uqee.spring.applicationContext.EmailBean"> |
02 | <property name="backList"> |
04 | <value>ncg2.0@163.com</value> |
05 | <value>niechanggang@gmail.com</value> |
06 | <value>373045912@qq.com</value> |
07 | </list> |
08 | </property> |
09 | </bean> |
11 | <bean id="emailNotifier" class="com.uqee.spring.applicationContext.EmailNotifier"> |
12 | <property name="notificationAddress"> |
13 | <value>qingwa@163.com</value> |
14 | </property> |
15 | </bean> |
测试类如下：
view source
print?
1 | ApplicationContext applicationContext = newClassPathXmlApplicationContext("applicationContext5.xml"); |
2 | EmailBean emailer = (EmailBean)applicationContext.getBean("emailer"); |
3 | emailer.sendEmail("373045912@qq.com", "邮件头", "邮件正文"); |
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