SimpleDateFormat 是要走的路；以所需的有意义的日期和时间格式解析您的字符串，最后将您的日期打印为所需的字符串.

SimpleDateFormat is the way to go; to parse your Strings in the required meaningful date and time formats and finally print your date as a required String.

您按如下方式指定 2 种格式:

You specify the 2 formats as follows:

SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
SimpleDateFormat timeFormat = new SimpleDateFormat("HHmm");

考虑一个简单的日期和时间硬编码数组(不是***的显示方式，但您的问题称之为数组):

Considering a simple hardcoded array of date and time (not the best way to show but your question calls it an array):

String[] array = { "12/31/2013", "1230" };

您必须在日历实例中设置这些解析日期:

You would have to set these parsed dates in a Calendar instance:

Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.HOUR, time.getHours());
cal.add(Calendar.MINUTE, time.getMinutes());

最后使用相同的 SimpleDateFormat

SimpleDateFormat newFormat = new SimpleDateFormat("MMMM dd, yyyy 'at' hh:mm");

以下是完整的工作代码:

public class DateExample {
    public static void main(String[] args) {
        SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
        SimpleDateFormat timeFormat = new SimpleDateFormat("HHmm");

        String[] array = { "12/31/2013", "1230" };

        try {
            Date date = dateFormat.parse(array[0]);
            Date time = timeFormat.parse(array[1]);

            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            cal.add(Calendar.HOUR, time.getHours());
            cal.add(Calendar.MINUTE, time.getMinutes());

            SimpleDateFormat newFormat = new SimpleDateFormat(
                    "MMMM dd, yyyy 'at' hh:mm");
            String datePrint = newFormat.format(cal.getTime());

            System.out.println(datePrint);
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

输出:

2013 年 12 月 31 日 12:30

December 31, 2013 at 12:30