Java Utililty Methods String to Timestamp

List of utility methods to do String to Timestamp

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Description

The list of methods to do String to Timestamp are organized into topic(s).

Method

longgetTimestamp(String timezone, String dateTime, String pattern)
get Timestamp 
SimpleDateFormat sdf = null;
if (null == pattern || "".equals(pattern)) {
    sdf = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);
} else {
    sdf = new SimpleDateFormat(pattern);
sdf.setTimeZone(TimeZone.getTimeZone(timezone));
long b = sdf.parse(dateTime).getTime() / 1000;
...
longgetTimestampFromDateString(String date)
This method computes the timestamp of the beginning of the day (UTC), given a random string yyyy-MM-dd 
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
cal.setTime(sdf.parse(date));
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return (cal.getTimeInMillis() / 1000L);
...
longgetTimeStampInSecond(String timeStr)
get Time Stamp In Second 
SimpleDateFormat timeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
    return timeFormat.parse(timeStr).getTime() / 1000;
} catch (ParseException e) {
    e.printStackTrace();
    return -1;
booleanisTimestamp(String str, boolean allowEmpty)
is Timestamp 
if (allowEmpty && isEmpty(str)) {
    return true;
if (str.length() != 19 || strToDate(str) == null) {
    return false;
return true;
longisTimeStampValid(String timestamp)
This method validates the given time stamp in String format 
boolean time = false;
try {
    StringTokenizer st = new StringTokenizer(timestamp, " ");
    if (st.countTokens() != 2) {
        return 0;
    String[] dateAndTime = new String[2];
    int i = 0;
...
longstring2Timestamp(String dateString, String timezone)
string Timestamp 
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
if ((timezone != null) && (!timezone.equals(""))) {
    df.setTimeZone(TimeZone.getTimeZone(timezone));
Date date1 = df.parse(dateString);
long temp = date1.getTime();
return temp;
longstring2timestamp(String timeString)
stringtimestamp 
int decimalIndex = timeString.indexOf(".") + 1;
String formatString;
if (decimalIndex > 0) {
    formatString = timeString.substring(0, decimalIndex);
    int cnt = 0;
    while (decimalIndex < timeString.length() - 1 && cnt < 3) {
        formatString += timeString.substring(decimalIndex, decimalIndex + 1);
        decimalIndex++;
...
longstringToTimestamp(String date)
string To Timestamp 
long time = -1L;
if (date.indexOf(" ") == -1) {
    try {
        time = (new SimpleDateFormat("yyyy-MM-dd")).parse(date).getTime() / 1000;
    } catch (ParseException pe) {
} else {
    try {
...
Stringtimestamp(String string)
Prepend a timestamp to the string defined by parameter string 
String formattedString = DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime()) + "    "
        + string;
return formattedString;
StringtimeStamp2Date(String timestampString)
time Stamp Date 
Long timestamp = Long.parseLong(timestampString) * 1000;
String date = new java.text.SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(new java.util.Date(timestamp));
return date;