public class DateParserT { /** * Date 与 String、long 的相互转换 * @param args */ public static void main(String[] args) { Date dt =new Date(); System.out.println(dt); //格式: Wed Jul 06 09:28:19 CST 2016 //格式:2016-7-6 String formatDate = null; formatDate = DateFormat.getDateInstance().format(dt); System.out.println(formatDate); //格式:2016年7月6日 星期三 formatDate = DateFormat.getDateInstance(DateFormat.FULL).format(dt); System.out.println(formatDate); //格式 24小时制:2016-07-06 09:39:58 DateFormat dFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //HH表示24小时制; formatDate = dFormat.format(dt); System.out.println(formatDate); //格式12小时制:2016-07-06 09:42:44 DateFormat dFormat12 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); //hh表示12小时制; formatDate = dFormat12.format(dt); System.out.println(formatDate); //格式去掉分隔符24小时制:20160706094533 DateFormat dFormat3 = new SimpleDateFormat("yyyyMMddHHmmss"); formatDate = dFormat3.format(dt); System.out.println(formatDate); //格式转成long型:1467770970 long lTime = dt.getTime() / 1000; System.out.println(lTime); //格式long型转成Date型,再转成String: 1464710394 -> ltime2*1000 -> 2016-05-31 23:59:54 long ltime2 = 1464710394; SimpleDateFormat lsdFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date lDate = new Date(ltime2*1000); String lStrDate = lsdFormat.format(lDate); System.out.println(lStrDate); //格式String型转成Date型:2016-07-06 10:17:48 -> Wed Jul 06 10:17:48 CST 2016 String strDate = "2016-07-06 10:17:48"; SimpleDateFormat lsdStrFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { Date strD = lsdStrFormat.parse(strDate); System.out.println(strD); } catch (ParseException e) { e.printStackTrace(); } } }