java產生時間戳記

package cn.mldn.lxh.util;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;public class IPTimeStamp {private SimpleDateFormat sdf = null;private String ip = null;public IPTimeStamp(){}public IPTimeStamp(String ip){this.ip = ip;}public String getIPTimeRand(){StringBuffer buf = new StringBuffer();if(this.ip!=null){String s[] = this.ip.split("\\.");for(int i=0;i<s.length;i++){buf.append(this.addZero(s[i],3));//不夠三位元字的要補0}}buf.append(this.getTimeStamp());//取得時間戳記Random r = new Random();for(int i=0;i<3;i++){buf.append(r.nextInt(10));//增加一個隨機數}return buf.toString();}private String addZero(String str,int len){StringBuffer s = new StringBuffer();s.append(str);while(s.length()<len){s.insert(0,"0");}return s.toString();}public String getDate(){this.sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");return this.sdf.format(new Date());}public String getTimeStamp(){this.sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");return this.sdf.format(new Date());}}