将Date.toString（）转换回Java中的日期[复制]-ConvertDate.toString()backtoDateinJava[duplicate]

Convert date to epoch time, which is a number of milliseconds stored as a long. Store long as string and parse back into long when needed.

将日期转换为纪元时间,这是一个以毫秒为单位存储的毫秒数。存储为字符串长,并在需要时解析为long。

long epoch = date.getTime(); //where date is your Date
String yourString = Long.toString(epoch); //to string for storage
long time = Long.valueOf(yourString).longValue(); ; //back to epoch
Date originaldate = new Date(Long.parseLong(time)); //back to date

When dealing with time, which is needed only internally to measure time periods, It is much better to store timestamps as long value (millis sicne 1.1.1970 UTC).

处理时间时,只需要在内部测量时间段,最好将时间戳存储为长值(millis sicne 1.1.1970 UTC)。

Use long timestamp = System.currentTimeMillis()

使用long timestamp = System.currentTimeMillis()

If a String storage is neccesary simply convert the Long to a String.

如果需要String存储,只需将Long转换为String。

String timeStampStr = String.parseLong(timeStamp);

Do not use Date.toString for other things than for logging or debugging. The toString() representation may be different in other countries. If a human readable timestamp string is needed you have to specify a Specific DateFormat, see also DateFormatter.

除了记录或调试之外,不要使用Date.toString。 toString()表示在其他国家可能有所不同。如果需要人类可读的时间戳字符串,则必须指定特定的DateFormat,另请参见DateFormatter。

Parsing a long it the most efficent way, however there may be cases that you have already formatted a date to some other format and want to parse that. Then you should use this

解析它是最有效的方式,但是可能有些情况下你已经将日期格式化为其他格式并想要解析它。那你应该用它

private static final String format = "yyyy-MM-dd HH:mm:ss";
private static final SimpleDateFormat formatter = new SimpleDateFormat(format, Locale.ENGLISH);
private Calendar dateTime = Calendar.getInstance();

public void setDateTime(String dateTimeString) {
    try {
        dateTime.setTime(formatter.parse(dateTimeString));
    } catch (ParseException e) {
         // Dummy handled exception
        dateTime.setTimeInMillis(0);
    }
}

Parse a long containing milliseconds since epoch

从epoch开始,解析一段长的毫秒

Date date = new Date(Long.parseLong(timeInMillisecondsString));

For date conversions you can use DateFormat class - read about parse method

对于日期转换,您可以使用DateFormat类 - 阅读有关解析方法的信息

Since you're using a plain toString() it should be coverable using a SimpleDateFormat.

由于您使用的是普通的toString(),因此使用SimpleDateFormat应该可以使用它。

Try this:

DateFormat dateFormat = new SimpleDateFormat();
Date myDate = dateFormat.parse(myDateString);