Convert and format a Date in JSP
From my JSP Page, I am getting Date in this format.
Fri May 13 2011 19:59:09 GMT 0530 (India Standard Time)
How can I convert this to the pattern yyyy-MM-dd HH:mm:ss?
In JSP, you'd normally like to use JSTL <fmt:formatDate> for this. You can of course also throw in a scriptlet with SimpleDateFormat, but scriptlets are strongly discouraged since 2003.
Assuming that ${bean.date} returns java.util.Date, here's how you can use it:
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
...
<fmt:formatDate value="${bean.date}" pattern="yyyy-MM-dd HH:mm:ss" />
If you're actually using a java.util.Calendar, then you can invoke its getTime() method to get a java.util.Date out of it that <fmt:formatDate> accepts:
<fmt:formatDate value="${bean.calendar.time}" pattern="yyyy-MM-dd HH:mm:ss" />
Or, if you're actually holding the date in a java.lang.String (this indicates a serious design mistake in the model; you should really fix your model to store dates as java.util.Date instead of as java.lang.String!), here's how you can convert from one date string format e.g. MM/dd/yyyy to another date string format e.g. yyyy-MM-dd with help of JSTL <fmt:parseDate>.
<fmt:parseDate pattern="MM/dd/yyyy" value="${bean.dateString}" var="parsedDate" />
<fmt:formatDate value="${parsedDate}" pattern="yyyy-MM-dd" />
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html dir="ltr" lang="en-US">
<head>
<meta charset="UTF-8" />
<title>JSP with the current date</title>
</head>
<body>
<%java.text.DateFormat df = new java.text.SimpleDateFormat("dd/MM/yyyy"); %>
<h1>Current Date: <%= df.format(new java.util.Date()) %> </h1>
</body>
</html>
Output: Current Date: 10/03/2010
Date td = new Date();
String b = new String("");
SimpleDateFormat format = new SimpleDateFormat("YYYY/MM/dd");
b = format.format(td);
out.println(b);
The example above showing the import with ...sun.com/jsp/jstl/format is incorrect (meaning it didn't work for me).
Instead try the below -this import statement is valid
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.com/jstl/core-rt" prefix="c-rt" %><%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt" %>
<html>
<head>
<title>Format Date</title>
</head>
<body>
<c-rt:set var="now" value="<%=new java.util.Date()%>" />
<table border="1" cellpadding="0" cellspacing="0"
style="border-collapse: collapse" bordercolor="#111111"
width="63%" id="AutoNumber2">
<tr>
<td width="100%" colspan="2" bgcolor="#0000FF">
<p align="center">
<b>
<font color="#FFFFFF" size="4">Formatting:
<fmt:formatDate value="${now}" type="both"
timeStyle="long" dateStyle="long" />
</font>
</b>
</p>
</td>
</tr>
/jsp in the path was introduced with JSTL 1.1 around november 2003. We're in 2011 already. Figure how out of date you are... Keep yourself and your libraries up to date.
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.util.Date"%>
<%@page import="java.util.Locale"%>
<html>
<head>
<title>Date Format</title>
</head>
<body>
<%
String stringDate = "Fri May 13 2011 19:59:09 GMT 0530";
Date stringDate1 = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss Z", Locale.ENGLISH).parse(stringDate);
String stringDate2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(stringDate1);
out.println(stringDate2);
%>
</body>
</html>
You can do that using the SimpleDateFormat class.
SimpleDateFormat formatter=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dates=formatter.format(mydate);
//mydate is your date object
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> <fmt:formatDate value="${bean.date}" pattern="yyyy-MM-dd HH:mm:ss" />
Fri May 13 2011 19:59:09 GMT 0530 (India Standard Time) is typical to Date#toString(), which means that he already has a java.util.Date object at hands which could impossibly come from a JSP file as HTTP request parameters are always java.lang.String (even then, converting String to Date would require knowlegde of SimpleDateFormat, which the OP apparently didn't have, otherwise he didn't ask this question at all).
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standard.jarof JSTL 1.0 lingering around in runtime classpath. Get rid of it.