tomcat下關閉應用，線程未終止

tomcat關閉時，有時候因爲各種原因會報線程未關閉的錯誤。像這樣

 The web application [/Test] appears to have started a thread named [your Thread] but has failed to stop it. This is very likely to create a memory leak.

我們可以

1.新建一個類實現ServletContextListener，然後重寫 contextDestroyed(ServletContextEvent arg0)方法，在它裏面關閉後臺進程。

2.也可以繼承ContextLoaderListener，ContextLoaderListener實現了ServletContextLoader。

3.注意web.xml中配置你自己的這個listener哦。

public void contextDestroyed(ServletContextEvent sce) {  
      destroyThreads();  
}  
private void destroyThreads(){
      final Set<Thread> threads = Thread.getAllStackTraces().keySet();  
      for (Thread thread : threads) {              
      if(thread.getName().equals("your thread identifier")){
           synchronized (this) {  
             try {  
                thread.stop();  
		          return;
             } catch (Exception e) {  
             }  
        }  
    }  
}