如何将 currentTimeMillis 转换为 Java 中的日期? [英] How to convert currentTimeMillis to a date in Java?

问题描述

我在服务器中生成的某些日志文件中有毫秒，我也知道生成日志文件的语言环境，我的问题是将毫秒转换为指定格式的日期.该日志的处理发生在位于不同时区的服务器上.转换为SimpleDateFormat"程序时会获取机器的日期，因为这种格式化的日期不代表服务器的正确时间.有没有办法优雅地处理这个问题?

I have milliseconds in certain log file generated in server, I also know the locale from where the log file was generated, my problem is to convert milliseconds to date in specified format. The processing of that log is happening on server located in different time zone. While converting to "SimpleDateFormat" program is taking date of the machine as such formatted date do not represent correct time of the server. Is there any way to handle this elegantly ?

long yourmilliseconds = 1322018752992l;
        //1322018752992-Nov 22, 2011 9:25:52 PM 

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS",Locale.US);

GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("US/Central"));
calendar.setTimeInMillis(yourmilliseconds);

System.out.println("GregorianCalendar -"+sdf.format(calendar.getTime()));

DateTime jodaTime = new DateTime(yourmilliseconds, 
                    DateTimeZone.forTimeZone(TimeZone.getTimeZone("US/Central")));
DateTimeFormatter parser1 = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss,SSS");

System.out.println("jodaTime "+parser1.print(jodaTime));

输出:

Gregorian Calendar -2011-11-23 08:55:52,992
jodaTime 2011-11-22 21:25:52,992

推荐答案

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(timeStamp);

int mYear = calendar.get(Calendar.YEAR);
int mMonth = calendar.get(Calendar.MONTH);
int mDay = calendar.get(Calendar.DAY_OF_MONTH);

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