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import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpServlet;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @date 2010-1-14
* @author wangpeng
* ¹¦ÄÜ£º¼àÌýÆ÷£¬ÓÃÀ´ÊµÏÖ¼ÆÊ±Æ÷
*/
public class ContextListener extends HttpServlet implements
ServletContextListener {
/**
*
*/
private static final long serialVersionUID = 1L;
private static final Log log = LogFactory.getLog(NewsTimerTask.class);
public ContextListener() {
}
private Timer timer = null;
public void contextInitialized(ServletContextEvent event) {
timer = new Timer(true);
log.info("¶¨Ê±Æ÷ÒÑÆô¶¯");
timer.schedule(new NewsTimerTask(event.getServletContext()),
TIME_NEWS_DELAY, TIME_NEWS_PERIOD);
log.info("ÒѾÌí¼ÓÈÎÎñµ÷¶È±í");
}
public void contextDestroyed(ServletContextEvent event) {
timer.cancel(); //¶¨Ê±Æ÷µÄÏú»Ù
log.info("¶¨Ê±Æ÷Ïú»Ù");
}
}
NewsTimerTask- ËùÒª°²ÅŵÄÈÎÎñ¡£ TIME_NEWS_DELAY - Ö´ÐÐÈÎÎñǰµÄÑÓ³Ùʱ¼ä£¬µ¥Î»ÊǺÁÃë¡£ Ϊ0ʱ±íÃ÷²»ÑÓ³ÙTIME_NEWS_PERIOD - Ö´Ðи÷ºóÐøÈÎÎñÖ®¼äµÄʱ¼ä¼ä¸ô£¬µ¥Î»ÊǺÁÃë¡£
NewsTimerTask¼Ì³ÐTimerTask
TimerTaskÊÇ ÓÉ Timer °²ÅÅΪһ´ÎÖ´Ðлò
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Java ÀíÂÛÓëʵ¼ù: Ãè»æḬ̈߳²È«ÐÔ
2007-12-15 00:10
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Brian Goetz (brian@quiotix.com), Ê×ϯ¹ËÎÊ, Quiotix Corp
2003 Äê 11 ÔÂ 15 ÈÕ
7Ô·ÝÎÒÃǵIJ¢·¢×¨¼Ò Brian Goetz ½« Hashtable ºÍ Vector ÀàÃèÊöΪ“ÓÐÌõ¼þḬ̈߳²È«µÄ”¡£Ò»¸öÀàÄѵÀ²»ÊÇḬ̈߳²È«¾ÍÊÇÏß³Ì ......
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package com.yz.myqueue;
public class Queue {
private Integer size;
private Integer front;
private Integer rear;
private Object[] datas;
public Queue(int size){
this.size=size;
this.front=-1;
this.rear=-1;
datas=new Object[size] ......
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1¡¢ÊÇÎļþ£º FileInputStream, FileOutputStream, FileReader, FileWriter
2¡¢ÊÇbyte[]£ºByteArrayInputStream, ByteArrayOutputStream
3¡¢ÊÇChar[]: CharArrayReader, CharArrayWriter
4¡¢ÊÇString: StringBufferInputStream, StringReader, StringW ......