pass Java servlet object into JSP file?

Question

How to pass object in java servlet to JSP file?

This post's answer by Matthew Abbott seems easy, but I'm not able to get it to work. I must be missing something obvious.

In my java servlet:

 request.setAttribute("testData", "TEST");
 request.getRequestDispatcher("/WEB-INF/myFile.jsp").include(request, response);

myFile.jsp is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<HTML lang='en'>
<HEAD>
    <TITLE>My Page</TITLE>
</HEAD>

<BODY>
  <p>${testData}</p> 
</BODY>
</HTML>

But this simply displays ${testData} rather than TEST.

If I change myFile.jsp as follows, it works fine, but I understand scriplets are discouraged:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<HTML lang='en'>
<HEAD>
    <TITLE>My Page</TITLE>
</HEAD>

<BODY>
  <% 
     String testData = (String) request.getAttribute("testData");
     out.println(testData);
  %>
</BODY>
</HTML>

Sure, I tried it just now and same results. Does EL require a `getAttribute()`? — user46688, Oct 23 '14 at 00:08

BillFromHawaii · Accepted Answer · 2014-10-23T00:41:44.613

1

Try adding this to your JSP:

 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

JSTL also has a dependency:

<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

edited Oct 23 '14 at 00:41

answered Oct 23 '14 at 00:24

BillFromHawaii

334
1
7

I think your uri is slightly off (I get a blank page). But, I did see a similar line in this post: `http://stackoverflow.com/questions/20501595/pass-data-from-servlet-to-jsp-without-forms?rq=1`, but it didn't make a difference. – user46688 Oct 23 '14 at 00:29
I just think that the feature you're trying to use is part of JSTL. I googled the uri, probably old. <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> is probably right. JSTL has a dependency as well. – BillFromHawaii Oct 23 '14 at 00:40
Where should `` get added? – user46688 Oct 23 '14 at 01:23
If you're using maven then with your dependencies in your pom.xml. If not then get the jar file (jstl-1.2.jar) from http://stackoverflow.com/tags/jstl/info and put it in your classpath /WEB-INF/lib. – BillFromHawaii Oct 23 '14 at 01:37
Thanks, I'm not using Maven. I'm coding everything by hand in a text editor. – user46688 Oct 23 '14 at 02:05
Ok, so get the jar and put it in /WEB-INF/lib. – BillFromHawaii Oct 23 '14 at 02:14

score 0 · Answer 2 · answered Oct 23 '14 at 00:43

0

You're trying to use EL which could be disabled. Try adding this to the page:

<%@ page isELIgnored="false" %>

answered Oct 23 '14 at 00:43

fgb

18,439
2
38
52

This makes the page go blank. No sure where I'm supposed to insert it, so I tried inserting inside `` tags, as well as (separately) before ` – user46688 Oct 23 '14 at 01:21

pass Java servlet object into JSP file?

2 Answers2