String dateStr = "Mon Apr 17 09:10:15 CST 2017"; 
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US);


//java.util.Date物件
Date date = (Date) sdf.parse(dateStr);



String formatStr = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
System.out.println(formatStr);


String formatStr2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
System.out.println(formatStr2);