JSTL format timestamp

JSTL format timestamp, for example, how can 1444226313 be displayed as 2015/10/7 21:58:33? Look at the following code:

<jsp:useBean id="myDate" class="java.util.Date"/> 
<c:set target="${myDate}" property="time" value="${data.timestamp*1000}"/> 
<fmt:formatDate pattern="yyyy-MM-dd hh:mm:ss" value="${myDate}" type="both"/> 

parameter myDate is customize,
parameter data.timestamp is pushed by server.