Java日期和時間戳互轉(看這一篇就夠了)
阿新 • • 發佈:2021-09-30
Java日期和時間戳互轉(看這一篇就夠了)
import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class IOTestMain { public static void main(String[] args) throws ParseException { System.out.println(System.currentTimeMillis()); System.out.println(date2long("2021", "09", "29", "14", "55", "03")); System.out.println(long2date(date2long("2021", "09", "29", "14", "55", "03"))); } public static long date2long(String year, String month, String day, String hour, String minutes, String sec) { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append(year); stringBuilder.append("/"); stringBuilder.append(month); stringBuilder.append("/"); stringBuilder.append(day); stringBuilder.append(" "); stringBuilder.append(hour); stringBuilder.append(":"); stringBuilder.append(minutes); stringBuilder.append(":"); stringBuilder.append(sec); String sDt = stringBuilder.toString(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); Date dt = null; try { dt = sdf.parse(sDt); if (dt != null) { return dt.getTime(); } } catch (ParseException e) { e.printStackTrace(); } return -1L; } public static String long2date(long timestamp) throws ParseException { Date date = new Date(); date.setTime(timestamp); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(date); } }
輸出:
1632972081606
1632898503000
2021-09-29 14:55:03
Process finished with exit code 0