how to get current date in java in GoogleAppEngine app, and separate Day, Month and Year from that date and store it in datastore

Question

[下图是我网页的屏幕截图，我正在创建一个gae应用，该应用将一些数据存储在Google数据存储中，但在客户端使用日期格式存在一些困难，我正在使用Anugularjs日期，如图所示，我想存储该日期，但我也想在Java中分隔该日期的日期月份和年份

Answer 1

Like on any other Java 7 system, a typical pattern (after the appropriate imports at the top of your Java code) would be:

Calendar calendar = new GregorianCalendar();
int year  = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH); 
int day   = calendar.get(Calendar.DAY_OF_MONTH);

That's because java.util.Date , which used to be the natural way to do things, is mostly deprecated in Java 7 (though AFAIK it still works).

In Java 8 you'd use java.time , but GAE does not yet support Java 8.