CODEWITHSUNDEEP
jspjstl
theJava
theJava

Reputation: 15034

jstl code issue

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<style type="text/css">
.even {
 background-color: silver;
}
</style>
<title>Registration Page</title>
</head>
<body>

<form:form action="add.htm" commandName="user">
 <table>
  <tr>
   <td>User Name :</td>
   <td><form:input path="name" /></td>
  </tr>
  <tr>
   <td>Password :</td>
   <td><form:password path="password" /></td>
  </tr>
  <tr>
   <td>Gender :</td>
   <td><form:radiobutton path="gender" value="M" label="M" /> <form:radiobutton
    path="gender" value="F" label="F" /></td>
  </tr>
  <tr>
   <td>Country :</td>
   <td><form:select path="country">
    <form:option value="0" label="Select" />
    <form:option value="India" label="India" />
    <form:option value="USA" label="USA" />
    <form:option value="UK" label="UK" />
   </form:select></td>
  </tr>
  <tr>
   <td>About you :</td>
   <td><form:textarea path="aboutYou" /></td>
  </tr>
  <tr>
   <td>Community :</td>
   <td><form:checkbox path="community" value="Spring"
    label="Spring" /> <form:checkbox path="community" value="Hibernate"
    label="Hibernate" /> <form:checkbox path="community" value="Struts"
    label="Struts" /></td>
  </tr>
  <tr>
   <td></td>
   <td><form:checkbox path="mailingList"
    label="Would you like to join our mailinglist?" /></td>
  </tr>
  <tr>
   <td colspan="2"><input type="submit" value="Register"></td>
  </tr>
 </table>
</form:form>
<c:if test="${fn:length(userList) > 0}">
 <table cellpadding="5">
  <tr class="even">
   <th>Name</th>
   <th>Gender</th>
   <th>Country</th>
   <th>About You</th>
  </tr>
  <c:forEach items="${userList}" var="user" varStatus="status">
   <tr class="<c:if test="${status.count % 2 == 0}">even</c:if>">
    <td>${user.name}</td>
    <td>${user.gender}</td>
    <td>${user.country}</td>
    <td>${user.aboutYou}</td>
   </tr>
  </c:forEach>
 </table>
</c:if>
</body>
</html>

When i execute my jsp page, this piece of code does not show up at all. The full source code is below. 

<c:if test="${fn:length(userList) > 0}">
    <table cellpadding="5">
        <tr class="even">
            <th>Name</th>
            <th>Gender</th>
            <th>Country</th>
            <th>About You</th>
        </tr>
        <c:forEach items="${userList}" var="user" varStatus="status">
            <tr class="<c:if test="${status.count % 2 == 0}">even</c:if>">
                <td>${user.name}</td>
                <td>${user.gender}</td>
                <td>${user.country}</td>
                <td>${user.aboutYou}</td>
            </tr>
        </c:forEach>
    </table>
</c:if>

Upvotes: 0

Views: 2455

Answers (1)

BalusC
BalusC

Reputation: 1108742

This can happen when JSTL isn't installed at all. To check this, rightclick page in webbrowser and choose View Source. If you see JSTL tags unparsed among all that HTML source, then it means that it's indeed not installed. You need to drop the JSTL JAR(s) in /WEB-INF/lib folder then. For Tomcat 6.x or newer, it suffices to drop just the jstl-1.2.jar file therein (and ensure that your web.xml is declared as per Servlet 2.5 spec).

But if you don't see JSTL tags in the HTML source then it means that the condition ${fn:length(userList) > 0} is always false. You need to ensure that this is not the case by putting a non-empty userList as a request attribute.

By the way, the ${fn:length(userList) > 0} can also be simplified to ${not empty userList}.

Upvotes: 2

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