How to convert ISO8601 to GMT Timestamp?

      TimeZone and Date Conversion using Java 8 APIs:

        ISO8601 to GMT Timestamp :

import java.sql.Timestamp;

import java.time.ZoneId;

import java.time.ZonedDateTime;

import java.util.TimeZone;

public class ConvertUtilTest {

       public static void main(String[] args) {

              ConvertUtilTest convertUtilTest = new ConvertUtilTest();

             

              convertUtilTest.convertIso8601ToGmtTimestamp();

                           

       }

      

       public void convertIso8601ToGmtTimestamp() {

              String iso8601 = "2011-12-03T11:15:30+09:00";

Timestamp result = ConvertDate.convertGmtTimestampFromIso8601(iso8601,                    "Asia/Tokyo");

              System.out.println(" convertIso8601ToGmtTimestamp :  "+result);

       }

}

--------------------------- ConvertDate.java---------------

public class ConvertDate {

      

       public static Timestamp convertGmtTimestampFromIso8601(String iso8061DateTime, String currentTimeZone) {

              ZonedDateTime zonedDateTime = convertZonedDateTimeFromIso8601(iso8061DateTime, currentTimeZone);

              return Timestamp.valueOf(LocalDateTime.ofInstant(zonedDateTime.toInstant(), ZoneOffset.UTC));

       }

public static ZonedDateTime convertZonedDateTimeFromIso8601(String iso8061DateTime, String currentTimeZone) {

              ZonedDateTime zonedDateTime = null;

              if (iso8061DateTime != null) {

                     Boolean hasOffset = null;

                     LocalDateTime localDateTime = null;

                     try {

                           // Getting OffsetDateTime to check that provided

                           // ISO string has offset OR not.

                           OffsetDateTime offsetDateTime = OffsetDateTime.parse(iso8061DateTime);

                           hasOffset = Boolean.TRUE;

                     } catch (DateTimeParseException dte) {

                           try {

                                  hasOffset = Boolean.FALSE;

                                  localDateTime = LocalDateTime.parse(iso8061DateTime);

                           } catch (DateTimeParseException dte2) {

                           }

                     }

                     if (!hasOffset) {

                           if (currentTimeZone != null && !currentTimeZone.isEmpty()) {

                                  zonedDateTime = ZonedDateTime.of(localDateTime, ZoneId.of(currentTimeZone));

                           }

                     } else {

                           zonedDateTime = ZonedDateTime.parse(iso8061DateTime);

                     }

              }

              return zonedDateTime;

       }

 }

Output:

More Conversion:

ZoneDateTime to ISO8601 ?

Convert GMT Timestamp to ISO8601 ?

Convet ZoneDateTime from ISO8601 ?

convertIso8601ToGmtTimestamp :  2011-12-03 02:15:30.0