如何在Java 8中将LocalDateTime转换为Date LocalDateTime意味着没有区域专注于 UTC 时间ZonedDateTime避免使用旧日期时间类避免从 epoch 计数关于 java.time
默认情况下，我使用的是巴西时区，但是当捕获纽约的一个LocalDateTime并转换为java.tim.Instant时，即时被正确填充。问题是，当我尝试使用Date.from生成日期（instantValue）时，而不是生成纽约的日期，我最终从巴西获取当前日期。
ZoneId nyZone = ZoneId.of("America/New_York");
ZoneId brazilZone = ZoneId.of("America/Recife");
LocalDateTime ldtBrazil = LocalDateTime.now(brazilZone);
LocalDateTime ldtNY = LocalDateTime.now(nyZone);
Instant instantBrazil = ldtBrazil.toInstant(ZoneOffset.UTC);
Instant instantNY = ldtNY.toInstant(ZoneOffset.UTC);
System.out.println("-------LocalDateTime-------");
System.out.println("ldtBrazil : "+ldtBrazil);
System.out.println("ldtNY : "+ldtNY);
System.out.println("\n-------Instant-------");
System.out.println("instantBrazil: "+instantBrazil);
System.out.println("instantNY : "+instantNY);
long milliBrazil = instantBrazil.toEpochMilli();
long milliNY = instantNY.toEpochMilli();
System.out.println("\n----------Milli----------");
System.out.println("miliBrazil : "+milliBrazil);
System.out.println("miliNY : "+milliNY);
Date dateBrazil = Date.from(instantBrazil);
Date dateNY = Date.from(instantNY);
System.out.println("\n---------Date From Instant---------");
System.out.println("dateBrazil: "+dateBrazil);
System.out.println("dateNY : "+dateNY);
System.out.println("\n---------Date From Milli---------");
System.out.println("dateBrazil: "+new Date(milliBrazil));
System.out.println("dateNY : "+new Date(milliNY));
结果
-------LocalDateTime-------
ldtBrazil : 2016-09-21T22:11:52.118
ldtNY : 2016-09-21T21:11:52.118
-------Instant-------
instantBrazil: 2016-09-21T22:11:52.118Z
instantNY : 2016-09-21T21:11:52.118Z
----------Milli----------
miliBrazil : 1474495912118
miliNY : 1474492312118
---------Date From Instant---------
dateBrazil: Wed Sep 21 19:11:52 BRT 2016
dateNY : Wed Sep 21 18:11:52 BRT 2016 //this data must be related to NY LocalDateTime, but reiceved a same date of Brazil.
---------Date From Milli---------
dateBrazil: Wed Sep 21 19:11:52 BRT 2016
dateNY : Wed Sep 21 18:11:52 BRT 2016
