Incorrect compile error?

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This topic has 10 replies, 4 voices, and was last updated 20 years, 5 months ago by goetterwind.

Viewing 11 posts - 1 through 11 (of 11 total)

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May 7, 2004 at 9:38 am #206778 Reply
dickon
Member
Hello all.

My MyEclipse is telling me that there is a compile error on one of my jsp pages, but I think that the compiler might be incorrect.

The code looks like this:
```
    <% String language = "en" %>
    <jsp:include page="<%= language %>/abc" />
```
I get a compiler error on the second line, with the error description reading,

exptected %>”

(Yes, that’s percent greater-than double-quotes.)

However, my understanding of the JSP specification, there is nothing wrong with my code.

Is this a MyEclipse bug? Have I written incorrect code?

Thanks

JDG

System information:
– Eclipse 2.1.2 (Build id: 200311030802)
– MyEclipse 2.7.1 (Version: 2.7.1, Build id: 200403241200-2.7.1-GA)
– this is a clean install of eclipse and MyEclipse.
– java 1.4.2_02
– OS: Windows XP
May 7, 2004 at 10:27 am #206779 Reply
Riyad Kalla
Member
You are missing a semi colon at the end of your 1st line, after the “en”. An expression, <%= blarg %>, does not need one because it is just that, an expression. However a scriplet, <% String blarg = “blarg”; %> does need one, because that scriplet can be expanded to man lines of Java, so the compiler needs to know where the lines of code end. Take the example:
```
<%
    String blarg = "ham";
    int length = blarg.length();
%>
```
May 7, 2004 at 10:46 am #206780 Reply
dickon
Member
Thanks Riyad, however, that doesn’t solve the problem.

Even after correcting the mistake, my original message stands. (It was a slightly contrived code block used primarily for demonstration purposes) In other words, the following code
```
    <% String language = "en"; %>
    <jsp:include page="<%= language %>/abc" /> 
```
(note the new semi-colon) still produces the same error stated in my first post:
```
exptected %>"
```
Interesting, so MyEclipse possibly did two mistakes: it didn’t find an error with the first line when it should have, and then it found an error with the second line of code, possibly when it shouldn’t have.

What’s the situation: is my code incorrect wrt the JSP specs, or is MyEclipse incorrecting finding an error?

JDG
May 7, 2004 at 10:48 am #206781 Reply

Riyad Kalla
Member

1) Please create a new JSP file that has just enough lines to duplicate this problem
2) Post the entire contents here…

That error, expected %> sometimes occurs when some unrelated line is missing a closing brace, I’d like to look at the whole file and reproduce it on my end before sending you off in every direction trying to troubleshoot this.

May 7, 2004 at 11:06 am #206782 Reply
dickon
Member
I used the New JSP wizard (File->New->JSP), and added the two lines below the HTML break tag…
```
<%@ page language="java" import="java.lang.*,java.util.*" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'MyJsp.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    
    
  </head>
  
  <body>
    This is my JSP page. <br>
    <% String lang = "en"; %>
    <jsp:include page="<%= lang %>/page" />
  </body>
</html>
```
JDG
May 7, 2004 at 11:14 am #206783 Reply
Riyad Kalla
Member
Perfect test-case, thank you for making this. I’ll pass it along, although admitedly this has me scratching my head.

As a quick fix (or maybe the ‘right’ way to do this) move your appending page path inside of the expression:
```
<jsp:include page="<%= lang + \"/page\" %>" /> 
```
You need to escape the quotes. OR, just make it part of the “lang” variable.
May 7, 2004 at 1:18 pm #206787 Reply
No Operation
Member
<jsp:include page=”<%= language %>/abc” />

unfortunately all StandardActions AND CustomActions accept runtime attribute values only in the forms
```
attr="<%= ... %>"
```
or
```
attr='<%= ... %>'
```
regards

NOP
May 7, 2004 at 1:36 pm #206788 Reply

dickon
Member

What are “StandardActions” and “CustomActions”? Are they internal constructs to MyEclipse, or are they definitions in the JSP specification?

JDG

May 10, 2004 at 5:40 pm #206868 Reply
No Operation
Member
The names are taken from the original JSP specification. Have a look into jsp-2_0-pfd3-spec.pdf.

standard actions start with
```
<jsp:...
```
custom actions start with the prefixes introduced by taglib directives
```
<%@taglib prefix="foo" uri="/bar"%>
<foo:...
```
NOP
May 25, 2004 at 1:34 pm #207486 Reply

Riyad Kalla
Member

nop,
Is this then not a bug? Can I close the thread?

June 8, 2004 at 4:08 am #208140 Reply

goetterwind
Member

i didn’t check back for the spec, but to my knowledge, nop is right
you have to put the whole thingie into rt

<taglib:tag attribute='<%= “wont” %>work’ />
<taglib:tag attribute='<%= “will work” %>’ />

with jsp EL it should also work like this

<taglib:tag attribute=’${“will”} ${“also “}work’ />

MAYBE you should change that confusing error message :))
regards
axel
Author

Posts

Viewing 11 posts - 1 through 11 (of 11 total)