java 时间 运算

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

Date nowDate = new Date();

System.out.print("当前日期" + sdf.format(nowDate));

System.out.println(" "+nowDate);

//5分钟化为毫秒

long fiveMinutes = 5 * 60 * 1000;

System.out.println(fiveMinutes);

nowDate.setTime(nowDate.getTime() - fiveMinutes);

String strTime = sdf.format(nowDate);

System.out.print("当前日期减去五分钟" + strTime);

System.out.println(" "+nowDate)