如何获取当前时间和某天前时间

//获取当前时间和五天前时间
				Date date=new Date();
				Calendar calendar=Calendar.getInstance();
				calendar.setTime(date);		
				calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 5);				
				Timestamp timeStamp1=new Timestamp(date.getTime());				
				Timestamp timestamp2=new Timestamp(calendar.getTime().getTime());