java 时间戳与Date 相互转化相关函数_date dated 转时间戳-优快云博客

一.日期转换为时间戳

public long getTimestamp() throws ParseException{

   Date date1 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
        .parse("2009/12/11 00:00:00");
        Date date2 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
        .parse("1970/01/01 08:00:00");
        long l = date1.getTime() - date2.getTime() > 0 ? date1.getTime()
        - date2.getTime() : date2.getTime() - date1.getTime();
        long rand = (int)(Math.random()*1000);

        return rand;
}

二.时间戳转换为date 型

public void getDate(String unixDate) {

   SimpleDateFormat fm1 = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
   SimpleDateFormat fm2 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
   long unixLong = 0;
   String date = "";
   try {
   unixLong = Long.parseLong(unixDate) * 1000;
   } catch(Exception ex) {
   System.out.println("String转换Long错误，请确认数据可以转换！");
   }

   try {
   date = fm1.format(unixLong);
   date = fm2.format(new Date(date));
   } catch(Exception ex) {
   System.out.println("String转换Date错误，请确认数据可以转换！");
   }
   System.out.println(date);
   }