web.xml文件中:
- <listener>
<listener-class>com.listeners.MyContextListener</listener-class>
</listener>
- <listener>
////////////////////////
package com.listeners;import javax.servlet.ServletContext;
import javax.servlet.ServletContextAttributeEvent;
//import javax.servlet.ServletContextAttributesListener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;public final class MyContextListener
implements ServletContextListener { private ServletContext context = null; public MyContextListener() {} //This method is invoked when the Web Application
//has been removed and is no longer able to accept
//requests public void contextDestroyed(ServletContextEvent event)
{ //Output a simple message to the server's console
System.out.println("The Simple Web App. Has Been Removed");
this.context = null; }
//This method is invoked when the Web Application
//is ready to service requests
//这样你就可以在下面的方法里面检查系统的环境了,肯定是在servlet初始
//化之前的
public void contextInitialized(ServletContextEvent event)
{
this.context = event.getServletContext(); //Output a simple message to the server's console
System.out.println("The Simple Web App. Is Ready"); }
}
- <listener>
<listener-class>com.listeners.MyContextListener</listener-class>
</listener>
- <listener>
////////////////////////
package com.listeners;import javax.servlet.ServletContext;
import javax.servlet.ServletContextAttributeEvent;
//import javax.servlet.ServletContextAttributesListener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;public final class MyContextListener
implements ServletContextListener { private ServletContext context = null; public MyContextListener() {} //This method is invoked when the Web Application
//has been removed and is no longer able to accept
//requests public void contextDestroyed(ServletContextEvent event)
{ //Output a simple message to the server's console
System.out.println("The Simple Web App. Has Been Removed");
this.context = null; }
//This method is invoked when the Web Application
//is ready to service requests
//这样你就可以在下面的方法里面检查系统的环境了,肯定是在servlet初始
//化之前的
public void contextInitialized(ServletContextEvent event)
{
this.context = event.getServletContext(); //Output a simple message to the server's console
System.out.println("The Simple Web App. Is Ready"); }
}
解决方案 »
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