从长期转换为日期格式

Question

我想以这种格式dd/mm/YYYY将Long值转换为String或Date.

我有Long格式的这个值:1343805819061.

可以将其转换为日期格式吗？

Answer 1

您可以使用以下代码行来执行此操作.这里timeInMilliSecond是长值.

 String dateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(TimeinMilliSeccond));

或者你也可以使用下面的代码.

 String longV = "1343805819061";
 long millisecond = Long.parseLong(longV);
 // or you already have long value of date, use this instead of milliseconds variable.
 String dateString = DateFormat.format("MM/dd/yyyy", new Date(millisecond)).toString();

参考: - DateFormat和SimpleDateFormat

PS根据您的需要更改日期格式.

Answer 2

您可以在Date实例或构造函数Date(long)上使用方法setTime;

setTime(long time) 
      Sets this Date object to represent a point in time that is time milliseconds after January 1, 1970 00:00:00 GMT.

Date(long date) 
      Allocates a Date object and initializes it to represent the specified number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT

然后使用简单的日期格式化程序

见http://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/text/DateFormatter.html