如何在tomcat啟動的時候運行一個Java類

設置個Listener就好了，在web.xml中指定描述。

web.xml其實就是tomcat啟動的時候會讀取的一個描述文件，比如訪問服務器的時候首頁等都可以在里面指定，有相應的tag。這里有解釋：http://blog.chinaunix.net/uid-20399471-id-1687965.html

實現這個Listener的接口：

public class MyServletContextListener implements ServletContextListener {

  @Override
  public void contextDestroyed(ServletContextEvent arg0) {
    //Notification that the servlet context is about to be shut down.   
  }

  @Override
  public void contextInitialized(ServletContextEvent arg0) {
    // do all the tasks that you need to perform just after the server starts

    //Notification that the web application initialization process is starting
  }

}

 

然后在web.xml中編寫listener的標簽，添加listener類：

MyTestListener換成自己實現ServletContextListener接口的類名

<listener>
     <listener-class>[package].MyTestListener</listener-class>
    </listener>
  

 

references:

http://stackoverflow.com/questions/13819773/how-to-run-specific-java-code-on-tomcat-start-or-on-application-deploy

http://stackoverflow.com/questions/158336/is-there-a-way-to-run-a-method-class-only-on-tomcat-startup

http://crunchify.com/how-to-run-java-program-automatically-on-tomcat-startup/

http://blog.sina.com.cn/s/blog_6ea90e4b0100ny3t.html