session.java

采用JAVA开发

package com.gctech.sms.sp.dwzb;
import java.util.*;
/**
 * 用户会话
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: gctech</p>
 * @author [e-mail]
 * @version 1.0
 */
public class Session
{
  Map map = new HashMap(5);
  int ttl;
  private  Date dateofExpiration = null;
  String sessionId = null;
  public Session(String id,int ttl)
  {
    this.sessionId = id;
    this.ttl = ttl;
    populate();
  }

  private  void populate()
  {

    if (ttl != 0)
    {
      dateofExpiration = new java.util.Date();
      java.util.Calendar cal = java.util.Calendar.getInstance();
      cal.setTime(dateofExpiration);
      cal.add(cal.MINUTE, ttl);
      dateofExpiration = cal.getTime();
    }
  }


  /**
   * 更新存活时间
   */
  private void update()
  {
    this.populate();
  }

  /**
   * 比较是否超期
   * @param now
   * @return
   */
  protected boolean isExpired(Date now)
  {
    // Remember if the minutes to live is zero then it lives forever!
    if (dateofExpiration != null)
    {
      // date of expiration is compared.
      if (dateofExpiration.before(now))
      {
          return true;
      }
      else
      {
        return false;
      }
    }
    else // This means it lives forever!
    {
      return false;
    }
  }
  public String getSessionId()
  {
    return this.sessionId;
  }

  public Object getValue(String name)
  {
    update();
    return map.get(name);
  }
  public void setValue(String name,Object o)
  {
    update();
    map.put(name,o);
  }
  public void clear()
  {
    update();
    map.clear();
  }

  public int hashCode()
  {
    return sessionId.hashCode();
  }


  public static void main(String[] args)
  {
//    Session session1 = new Session();
  }

}