Java生成时间随机数

文件上传或下载或许会用到，生成时间的随机数。

例：文件名+"_"+()+扩展名。（TimeStamp ts = new TimeStamp()）

import ;
import ;
import ;

public class TimeStamp
{
  private SimpleDateFormat sdf = null;

  public String getTimeRand()
  {
    StringBuffer buf = new StringBuffer();
    (getTimeStamp());
    Random r = new Random();
    for (int i = 0; i < 3; i++) {
      ((10));
    }
    return ();
  }
  public String getDate() {
     = new SimpleDateFormat("yyyy-MM-dd HH:mm:");
    return (new Date());
  }
  public String getTimeStamp() {
     = new SimpleDateFormat("yyyyMMddHHmmssSSS");
    return (new Date());
  }
}