преобразовать дату в JAVA Date
DateTimeFormatter jsonDateFormatter = new DateTimeFormatterBuilder()
.appendLiteral("/Date(")
.appendValue(ChronoField.INSTANT_SECONDS)
.appendValue(ChronoField.MILLI_OF_SECOND, 3)
.appendLiteral(")/")
.toFormatter();
String createdOn = "/Date(1406192939581)/";
Instant created = jsonDateFormatter.parse(createdOn, Instant::from);
System.out.println("Created on " + created);
Sello Fotoyi