java 中的日期转换？

Question

我有这个 date:2/23/2016 4:28:46 PM

String d="2/23/2016 4:28:46 PM";
Format formatter = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss");
try {
    Date date = ((DateFormat) formatter).parse(d);
    formatter = new SimpleDateFormat("dd MMM HH:mm a");
    String notDate = formatter.format(date);
    holder.tvNotificationTime.setText(notDate);
    System.out.println(notDate);
} catch (ParseException e) {
    e.printStackTrace();
}

我希望输出为

23 Feb 4:28 PM

但是我得到的输出是

23 Feb 04:28 am

这是怎么回事？

Answer 1

在第二个DateFormat对象中使用一个H：

formatter = new SimpleDateFormat("dd MMM h:mm a");

您还需要第一个格式化程序的 AM/PM 标记：

Format formatter = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");

查看来自 Javadocs 的注释：

Number: For formatting, the number of pattern letters is the minimum number of digits, and shorter numbers are zero-padded to this amount. For parsing, the number of pattern letters is ignored unless it's needed to separate two adjacent fields.

Answer 2

How about this:

        Date date1 = new Date("2/23/2016 4:28:46 PM");
        SimpleDateFormat sdf = new SimpleDateFormat("dd MMM hh:mm:ss a");
        String formattedDate = sdf.format(date1);
        System.out.println("Formatted Date: "+formattedDate);

java 中的日期转换？

Date conversion in java?

java

date

simpledateformat