Java API for datetime formatters have evolved as well
from
import java.util.Date
import java.util.Calendar;
and
import java.text.SimpleDateFormat;
import java.text.DateFormat;
to
import java.time.format.DateTimeFormatter;
Traditional code style
OR
2019-09-25T10:07:19.839Z
Database timestamp impendence was always there
import java.sql.Timestamp;
Newer style
Sample Output
2019-09-25T10:07:19.839Z
Plz Note: Observe the use of new formatter class (s)
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
Next Generation Compact Style
Sample Output
2019-09-25T10:07:19.839Z
from
import java.util.Date
import java.util.Calendar;
and
import java.text.SimpleDateFormat;
import java.text.DateFormat;
to
import java.time.format.DateTimeFormatter;
Traditional code style
public Timestamp convertStringToTimestamp(String str_date) {
try {
DateFormat formatter;
formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
Date date = (Date) formatter.parse(str_date);
java.sql.Timestamp timeStampDate = new Timestamp(date.getTime());
return timeStampDate;
} catch (ParseException e) {
logger.error("Exception happened here:" + e);
return null;
}
}
OR
// Must create new SimpleDateFormat and TimeZone on each method invocation since neither of these classes are thread-safe.Sample Output
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSX");
simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
return simpleDateFormat.format(new Timestamp(System.currentTimeMillis()));
2019-09-25T10:07:19.839Z
Database timestamp impendence was always there
import java.sql.Timestamp;
Newer style
private static final DateTimeFormatter TIMESTAMP_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSX");
..
public static String getCurrentTimestamp() {
// No need to create new DateTimeFormatter or ZoneOffset on each method invocation since both of these classes are thread-safe.
return TIMESTAMP_FORMATTER.format(OffsetDateTime.now().withOffsetSameInstant(ZoneOffset.UTC));
}
..
Sample Output
2019-09-25T10:07:19.839Z
Plz Note: Observe the use of new formatter class (s)
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
Next Generation Compact Style
import java.time.Instant;
..
System.out.println(Instant.now());
Sample Output
2019-09-25T10:07:19.839Z
