Tomcat启动就执行特定方法

import java.util.Timer;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

public class TestListener implements ServletContextListener {
  private Timer timer = null;

  public void contextInitialized(ServletContextEvent event) {
    timer = new Timer(true);
    timer.schedule(new TestTimer(), 0, 86400000);//milliseconds
  }

  public void contextDestroyed(ServletContextEvent event) {
    timer.cancel();
  }
}

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import java.util.TimerTask;

public class TestTimer extends TimerTask {
  public void run() {
    // do something ...
  }
}

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web.xml:

<listener>
<listener-class>test.TestListener</listener-class>
</listener>