Java时间格式转换

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
/**
* 时间格式转换
*/
public class DateConvert{
/**
* @param args
*/
public static void main(String[] args) throws ParseException {
// show current date.
Date date = new Date();
System.out.println(date);
System.out.println("--- Date <==> String -------------------");
// date to string.
DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh-mm-ss");
String date2String = df.format(date);
System.out.println(date2String);
// string to date.
Date string2Date = df.parse(date2String);
System.out.println(string2Date);
System.out.println("--- CST <==> GMT -------------------");
// date to GMT string.
DateFormat dfGMT = new SimpleDateFormat("EEE, d-MMM-yyyy HH:mm:ss z", Locale.ENGLISH);
dfGMT.setTimeZone(TimeZone.getTimeZone("GMT")); // modify Time Zone.
String date2GMTString = dfGMT.format(date);
System.out.println(date2GMTString); // print GMT.
// GMT string to date.
Date gMTSting2String = dfGMT.parse(date2GMTString);
System.out.println(gMTSting2String);
}
}

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