how to convert date in java

问题:

I am new in android . I have to convert following date into this time stamp (Wed Oct 12 14:17:42 GMT+05:30 2011)

Thu, 27 May 2010 12:37:27 GMT

This is the date that I am getting from the server through the header. I have converted it into the String object. Now I have to convert it into the Date format like: Wed Oct 12 14:17:42 GMT+05:30 2011

Please could you help me how should I convert it into the (Wed Oct 12 14:17:42 GMT+05:30 2011) this format using timestamp.

回答1:

Have a look at DateFormat or SimpleDateFormat which provide parse() and format() methods. DateFormat provides a bunch of standard formats whereas SimpleDateFormat allows you to provide your own format expression.

Example for your input date:

//note that you need the locale as well, since the weekdays and months are written in a specific language, English in that case
SimpleDateFormat parseFormat = new SimpleDateFormat( "E, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH );
SimpleDateFormat writeFormat = new SimpleDateFormat( "E MMM dd HH:mm:ss z yyyy", Locale.ENGLISH );
writeFormat.setTimeZone( TimeZone.getTimeZone( "GMT" ) );

Date tDate = parseFormat.parse( "Wed, 12 Oct 2011 14:17:42 GMT" );

System.out.println(writeFormat.format(tDate )); //Wed Oct 12 14:17:42 GMT 2011

Edit: If you want a more usable API, try JodaTime.