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1 package sanglp.servlet; 2 3 import javax.servlet.ServletContext; 4 import javax.servlet.ServletContextAttributeEvent; 5 import javax.servlet.ServletContextAttributeListener; 6 import javax.servlet.annotation.WebListener; 7 8 /** 9 * Created by Administrator on 2016/10/5. 10 * 监听ServletContext范围内属性改变的Listener 11 */ 12 @WebListener 13 public class MyServletContextAttributeListener implements ServletContextAttributeListener { 14 15 @Override 16 public void attributeAdded(ServletContextAttributeEvent servletContextAttributeEvent) { 17 ServletContext application=servletContextAttributeEvent.getServletContext(); 18 //获取添加的属性名和属性值 19 String name=servletContextAttributeEvent.getName(); 20 Object value=servletContextAttributeEvent.getValue(); 21 System.out.println(application+"范围内添加了"+name+"值为"+value+"的属性"); 22 23 24 } 25 26 @Override 27 public void attributeRemoved(ServletContextAttributeEvent servletContextAttributeEvent) { 28 ServletContext application=servletContextAttributeEvent.getServletContext(); 29 //获取添加的属性名和属性值 30 String name=servletContextAttributeEvent.getName(); 31 Object value=servletContextAttributeEvent.getValue(); 32 System.out.println(application+"范围内删除了"+name+"值为"+value+"的属性"); 33 } 34 35 36 @Override 37 public void attributeReplaced(ServletContextAttributeEvent servletContextAttributeEvent) { 38 ServletContext application=servletContextAttributeEvent.getServletContext(); 39 //获取添加的属性名和属性值 40 String name=servletContextAttributeEvent.getName(); 41 Object value=servletContextAttributeEvent.getValue(); 42 System.out.println(application+"范围内替换了"+name+"值为"+value+"的属性"); 43 44 } 45 }
【JavaEE企业应用实战学习记录】MyGetAttributeListener
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原文地址:http://www.cnblogs.com/dream-to-pku/p/5933220.html