jsp页面中如何将时间戳字符串格式化为时间标签

<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE taglibPUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN""http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd"><taglib><tlib-version>1.0</tlib-version><jsp-version>1.2</jsp-version><short-name>date</short-name><uri>http://com.demo.util.datejstl/tags</uri><tag><name>date</name><tag-class>com.demo.util.jstl.JSTLUtil</tag-class><attribute><name>value</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute><attribute><name>parttern</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute></tag></taglib>

<%@ taglib uri="http://com.demo.util.datejstl/tags" prefix="date"%>

<date:date value="${time}" parttern="yyyy-MM-dd HH:mm:ss"></date:date></div>