Java处理时间格式CST和GMT转换方法示例

public static void main(String[] args) throws ParseException {
    String dateStr = "Mon Oct 26 22:22:22 CST 2022";
    DateFormat cst = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    DateFormat gmt = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.ENGLISH);
    Date dateTime = gmt.parse(dateStr);
    String dateString = cst.format(dateTime);
    System.out.println(dateString);
}

public static void main(String[] args) throws ParseException {
      Date date = new Date();
      DateFormat gmt = new SimpleDateFormat("EEE, d-MMM-yyyy HH:mm:ss z", Locale.ENGLISH);
      gmt.setTimeZone(TimeZone.getTimeZone("GMT"));
      String dateStr = gmt.format(date);
      System.out.println(dateStr);
  }

public static void main(String[] args) throws ParseException {
    DateFormat format = new SimpleDateFormat("EEE, d-MMM-yyyy HH:mm:ss z", Locale.ENGLISH);
    format.setTimeZone(TimeZone.getTimeZone("GMT"));
    Date parse = format.parse("Fri, 23-Sep-2022 03:15:55 GMT");
    System.out.println(parse);
  }