如何在 Tomcat 启动或应用程序部署时运行特定的 java 代码？
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How to run specific java code on Tomcat start or on application deploy?
提问by Timofei Davydik
Possible Duplicate:
tomcat auto start servlet
How do I load a java class (not a servlet) when the tomcat server starts
可能的重复：
tomcat 自动启动 servlet
如何在 tomcat 服务器启动时加载 java 类（不是 servlet）
I have web application running on Tomcat server. I want to run specific code in my application once when Tomcat starts or when this application is deployed. How can I achieve it? Thanks
我在 Tomcat 服务器上运行了 Web 应用程序。我想在 Tomcat 启动或部署此应用程序时在我的应用程序中运行一次特定代码。我怎样才能实现它？谢谢
回答by Abubakkar
You need to implement ServletContextListner interface and write the code in it that you want to execute on tomcat start up.
您需要实现 ServletContextListner 接口并在其中编写要在 tomcat 启动时执行的代码。
Here is a brief description about it.
这是关于它的简要说明。
ServletContextListner is inside javax.servlet package.
ServletContextListner 在 javax.servlet 包内。
Here is a brief code on how to do it.
这是有关如何执行此操作的简短代码。
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
}
}
And you need configure it in your deployment descriptor web.xml
你需要在你的部署描述符 web.xml 中配置它
<listener>
<listener-class>
mypackage.MyServletContextListener
</listener-class>
</listener>
