轉換日期和時間爲毫秒

Question

我有2個輸入字段的日期和時間

ex: 23/05/2014 as date and 5:30 as time (24 hour format) 

我如何轉換這2個輸入到毫秒的java

感謝

Answer 1

也許這可以幫助你：

String dstr = ... // from date input field 
String tstr = ... // from time input field 

String pattern = "dd/MM/yyyy H:mm"; 
String dateTimeStr = dstr + " " + tstr; 

SimpleDateFormat fmt = new SimpleDateFormat(pattern); 
try { 
    Date date = fmt.parse(dateTimeStr); 
    long msecs = date.getTime(); 
} catch (ParseException ex) { 
    // Handle parsing error here 
} 

Answer 2

String givenDateString = "Tue Apr 23 16:08:28 GMT+05:30 2013"; 
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy"); 
try { 
    Date mDate = sdf.parse(givenDateString); 
    long timeInMilliseconds = mDate.getTime(); 
    System.out.println("Date in milli :: " + timeInMilliseconds); 
} catch (ParseException e) { 
      e.printStackTrace(); 
}