我可以将 hh:mm 格式转换为 yyyy-MM-dd HH:mm:ss 吗？

阿姆丽塔·萨普科塔

我有一个日期字符串，格式为 hh:mm。我想将其转换为 yyyy-MM-dd HH:mm:ss 这种格式并将其转换为 UTC 时区并将其保存到数据库中。

我试过这个：

  private void returnPickupTimeUTC(){
        String pickupTime = "04:05 pm";
        Date pickDate = null;
        SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a",Locale.US);
        try{
           pickDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(pickupTime);
        } catch (ParseException ex){

        }
Calendar calendar = Calendar.getInstance();
        calendar.setTime(pickDate);
        Date time = calendar.getTime();
        SimpleDateFormat outputFmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.US);
        outputFmt.setTimeZone(TimeZone.getTimeZone("UTC"));
        pickupTimeStr =outputFmt.format(time);
        System.out.println(outputFmt.format(time));
    }

孙长

这是我的解决方案：

private void returnPickupTimeUTC() {
    try {
        String pickupTime = "04:05 pm";

        // Use this to get hour and minute from `pickupTime`
        SimpleDateFormat defaultSdf = new SimpleDateFormat("hh:mm a", Locale.getDefault());
        Calendar pickUpDate = Calendar.getInstance(Locale.getDefault());
        pickUpDate.setTime(defaultSdf.parse(pickupTime));

        // Set the hour and minute for current date.
        Calendar now = Calendar.getInstance(Locale.getDefault());
        now.set(Calendar.HOUR, pickUpDate.get(Calendar.HOUR));
        now.set(Calendar.MINUTE, pickUpDate.get(Calendar.MINUTE));

        // Convert `pickupTime` from "hh:mm a" to "yyyy-MM-dd HH:mm:ss" with UTC time zone.
        SimpleDateFormat utcSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        utcSdf.setTimeZone(TimeZone.getTimeZone("UTC"));
        pickupTimeStr = utcSdf.format(now.getTime());
        System.out.println(pickupTimeStr);
    } catch (ParseException e) {
        e.printStackTrace();
    }
}

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