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confusion in running an simple jstl application

Greenhorn

Posts: 13

posted 17 years ago

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Dear dudes,
I'm trying to run a simple jsp page which uses jstl tags.

My container and configuration details:
Container: Tomcat 5.5
Downloaded JSTL version: JSTL 1.1 ( from jakarta - apache)

I copied jstl.jar and standard.jar to my webapplications lib folder.

I also copied tld files ( from the tld folder) to my applications WEB-INF
folder and configured the tld files in my web.xml.

In my application through my html page i am getting a name and i'm storing it in a list along with other objects in a servlet and setting this as an attribute to my request object so that my jsp page accesses it.

In my jsp page , i'm using core jstl tag to iterate over this collection and print each element.

My html page is:

<html>
<head>
<body>
<form method="post" action="controllerservlet.do">
USERName:<input type="text" name="username">
<center> <input type="SUBMIT"> </center>
</form>
</body>
</head>
</html>

My servlet is:
 
package com.example.model;
import java.io.*; 
import javax.servlet.*;
import javax.servlet.http.*;

public class MyControllerServlet extends HttpServlet
{
public void doPost(HttpServletRequest req,HttpServletResponse res)throws IOException,ServletException
{
String name=req.getParameter("username");
//java.util.Date date = new java.util.Date();
String[] nameList={ name,"sai","narayanan","amma"};
//req.setAttribute("name",name);
//req.setAttribute("Today's date",date);
req.setAttribute("nameList",nameList);
RequestDispatcher view=req.getRequestDispatcher("/usingjstl.jsp");
//RequestDispatcher view=req.getRequestDispatcher("/presentationjsp.jsp");
view.forward(req,res);
}
}
 
My jsp page is:
 
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
<strong>Name List: </strong>
<br>
<br>
 
<table>
<c: forEach var="name" items="${nameList}">
<tr>
<td>${name} </td>
</tr>
</c:forEach>
</table>
</body>b
</html>
 
my web.xml file is:
 
<?xml version="1.0" encoding="ISO-8859-1"?>

 
<web-app>
<servlet>
<servlet-name>RequestDispatcherDemo</servlet-name>
<servlet-class>com.example.model.MyControllerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RequestDispatcherDemo</servlet-name>
<url-pattern>/controllerservlet.do</url-pattern>
</servlet-mapping>
 
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>
 
</web-app>
 
When i try to run my application i'm getting

org.apache.jasper.JasperException: /usingjstl.jsp(9,0) No tag "" defined in tag library imported with prefix "c"
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:196)
org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1308)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1560)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:211)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:146)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.example.model.MyControllerServlet.doPost(MyControllerServlet.java:19)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

could anyone fix this issue and whether jstl1.1 binaries are suited for Tomcat5.5 version.

Regards.

Ben Souther

Sheriff

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posted 17 years ago

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Move the two jar files (jstl.jar and standard.jar) to
webapps/{your-app}/WEB-INF/lib.

Get rid of the tld files that you added.
They exist inside the jars and will be found there.

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Bear Bibeault

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posted 17 years ago

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And remove the tld declaration that you added to the web.xml.

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Shashi Ranjan

Greenhorn

Posts: 8

posted 17 years ago

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Just move standard.jar and jstl.jar in WEB-INF/lib and you don't have to mention any tld for that. There is an error in your jsp code . Instead of writing <c: forEach> you should write <c:forEach> there should be no gap between : and forEach. Another problem is that you have placed a b after</body> ...........once you correct this your code will run fine and give you the output
the name you pass as parameter
sai
narayanan
amma.

pravin kantipudi

Greenhorn

Posts: 5

posted 17 years ago

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<c: forEach var="name" items="${nameList}"><tr><td>${name} </td></tr>
</c:forEach>

Please check this tag you need to use <c:forEach> but check what you have

you have <c: forEach var="name" items="${nameList}"> and see the space. that is the issue.

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