package Test;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.HashMap;import java.util.Map;/* * 生成序列号 * @author huifeidexiaobenzhu * @time 2014-11-27 */public class CreateSeriaNo {	private static Map<String,String> map=new HashMap<String,String>();	private static String STATNUM="000001";		/**	 * 获取年月日	 * @return	 */	public String getTime(){		Calendar cal=Calendar.getInstance();		cal.setTime(new Date());		DateFormat df=new SimpleDateFormat("yyyyMMdd");		return df.format(cal.getTime());	}  	/**	 * 判断序号是否到了最后一个	 * @param s	 * @return	 */	public String getLastSixNum(String s){		String rs=s;		int i=Integer.parseInt(rs);		int f=(int) (Math.random()*100000);		i++;		rs=""+f;		for(int j=rs.length();j<6;j++){			rs="0"+rs;		}		return rs;	}		/**	 * 产生不重复的号码  枷锁	 * @return	 */	public synchronized String getNum(){		String yearAMon=getTime();		String last6Num=map.get(yearAMon);		if(last6Num==null){			map.put(yearAMon, STATNUM);		}else{			map.put(yearAMon, getLastSixNum(last6Num));		}		return yearAMon+map.get(yearAMon);	}		/**	 * main测试	 * @param args	 */	public static void main(String[] args) {		CreateSeriaNo t=new CreateSeriaNo();		for(int i=0;i<10;i++){			System.out.println(t.getNum());		}	}}