jstl reformat date exception

[Shilpa Tendulkar]

Hi all, I am having bit trouble formating date using jstl.
<fmt:formatDate value="${mydate}" type="DATE" pattern="dd/MM/yyyy"/>
I am using JSTL1.1 standard.jar and JSTL1.1 jstl.jar
and stack trace is

  
22-Oct-2007 16:18:53 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.el.ELException: Attempt to convert String "2007-08-13" to type "java.util.Date", but there is no PropertyEditor for that type
        at org.apache.commons.el.Logger.logError(Logger.java:481)
        at org.apache.commons.el.Logger.logError(Logger.java:498)
        at org.apache.commons.el.Logger.logError(Logger.java:566)
        at org.apache.commons.el.Coercions.coerceToObject(Coercions.java:769)
        at org.apache.commons.el.Coercions.coerce(Coercions.java:343)
        at org.apache.commons.el.ExpressionEvaluatorImpl.convertToExpectedType(ExpressionEvaluatorImpl.java:345)
        at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:267)
        at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:190)
        at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:932)
        at org.apache.jsp.booking_jsp._jspx_meth_fmt_formatDate_0(booking_jsp.java:237)
        at org.apache.jsp.booking_jsp._jspService(booking_jsp.java:195)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:619)
  

[Shilpa Tendulkar]

After some research I found the solution.
Because my value is string I can not directly use <fmt:formatDate> so I have to parse the date and then format it.
Following is the solution:

<fmt:parseDate value="${myDate}" type="DATE" pattern="yyyy-MM-dd"                var="formatedDate"/> 
<fmt:formatDate value="${formatedDate}" pattern="EEE, MMM dd yyyy " type="DATE"/>  

Thanks.

[Bear Bibeault]

Exactly, in the same way you couldn't pass a string to a method expecting a java.util.Date.

[PetriJ Airio]

I had the same problem and found this solution works. However, what I'm now trying to do is create Tag which takes date string as parameter and does the same conversion. For some reasen the two lines of code in tag don't work even they work in the jsp-page.


Here is my TAG, displayDate.tag:

    
<%@ tag pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
 
<%@ attribute name="value" required="true" type="java.lang.String" %>
 
<fmt:parseDate value="${value}" type="DATE" pattern="yyyy-MM-dd" var="formatedDate"/> 
<fmt:formatDate value="${formatedDate}" pattern="dd.MM.yyyy" type="DATE"/>

And from the jsp-page I try to call it like this:

<%@ taglib prefix="web" uri="http://xxxx/component-commonweb" %>
 
...
...
 
<web:displayDate value="2007-11-27" />
 

when the web:displayDate tag is executed I got exception:

12:45:17,821 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
org.jboss.util.NestedRuntimeException: Unparseable date: "2007-11-27"; - nested throwable: (java.text.ParseException: Unparseable date: "2007-11-27")
        at org.jboss.util.propertyeditor.DateEditor.setAsText(DateEditor.java:134)
        at org.apache.commons.el.Coercions.coerceToObject(Coercions.java:778)
        at org.apache.commons.el.Coercions.coerce(Coercions.java:343)
        at org.apache.commons.el.ExpressionEvaluatorImpl.convertToExpectedType(ExpressionEvaluatorImpl.java:345)
...
...

What is causing that the code works on the jsp-page but not inside the tag ?

Best Regards,

PetriJ Airio