Joda-Time時間格式轉換

1. String轉DateTime，DateTime轉時間戳，DateTime轉Date

DateTimeFormatter yyyyMMdd = DateTimeFormat.forPattern("yyyyMMdd");
DateTime dateTime = DateTime.parse("20191122", yyyyMMdd);
long millis = dateTime.getMillis();
Date date = dateTime.toDate();

2. Date轉DateTime，DateTime轉String

DateTime dateTime = new DateTime(new Date());
String dateFormat = dateTime.toString("yyyy/MM/dd");

3. 時間戳轉DateTime，DateTime轉String

long millis = System.currentTimeMillis(); DateTime dateTime = new DateTime(millis); String dateFormat = dateTime.toString("yyyy/MM/dd");