asked on
Trouble Creating jarfile
I've had little success with creating my own jarfiles. Here's my latest attempt. I have the java file hprsPurchase.java:
I do the following:
I add $CATALINA_HOME/common/lib/
I add <%@ page import="hprsPurchase.*" %> to my jsp file. Without referencing the snagFinalPaymentDate() function the jsp file "compiles" at this point. (If I leave off the ".*" I get: The import hprsPurchase cannot be resolved")
When I do reference the function:
I get the error:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
hprsPurchase cannot be resolved to a type;
I also tried:
and got:
hprsPurchase cannot be resolved
What am I doing wrong?
Linux kernel 2.6.37.6
javac version: 1.7.0_02
tomcat version: 6.0.14
import java.util.Date;
import java.text.SimpleDateFormat;
class hprsPurchase {
public static Date snagFinalPaymentDate()
{
return new Date();
}
} // endclass
I do the following:
$ javac hprsPurchase.java
$ jar cf hprsPurchase.jar hprsPurchase.class
$ sudo cp hprsPurchase.jar $CATALINA_HOME/common/lib
I add $CATALINA_HOME/common/lib/
I add <%@ page import="hprsPurchase.*" %> to my jsp file. Without referencing the snagFinalPaymentDate() function the jsp file "compiles" at this point. (If I leave off the ".*" I get: The import hprsPurchase cannot be resolved")
When I do reference the function:
Date now = new hprsPurchase.snagFinalPaymentDate();
I get the error:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
hprsPurchase cannot be resolved to a type;
I also tried:
Date now = new Date();
now = hprsPurchase.snagFinalPaymentDate();
and got:
hprsPurchase cannot be resolved
What am I doing wrong?
Linux kernel 2.6.37.6
javac version: 1.7.0_02
tomcat version: 6.0.14
JSPJava
Last Comment
CEHJ
ASKER
thanks!
I would not use jars in that context without using an explicit package
The class must be public. Class names in Java begin upper case
package hprsPurchase;
import java.text.SimpleDateFormat;
import java.util.Date;
public class HprsPurchase {
public static Date snagFinalPaymentDate() {
return new Date();
}
} // endclass
The class must be public. Class names in Java begin upper case
ASKER
I've made your suggested changes. I now get:
An error occurred at line: 21 in the generated java file
The import HprsPurchase cannot be resolved
I tried both of:
<%@ page import="HprsPurchase" %>
<%@ page import="HprsPurchase.*" %>
I've renamed the program to HprsPurchase.java. It is:
I modified the CLASSPATH for the new jarfile and restarted tomcat.
You know, I've created function libraries on numerous platforms and this jarfile thing keeps stumping me!
An error occurred at line: 21 in the generated java file
The import HprsPurchase cannot be resolved
I tried both of:
<%@ page import="HprsPurchase" %>
<%@ page import="HprsPurchase.*" %>
I've renamed the program to HprsPurchase.java. It is:
package hprsPurchase;
import java.util.Date;
import java.text.SimpleDateFormat;
public class HprsPurchase {
public static Date snagFinalPaymentDate()
{
return new Date();
}
} // endclass
$ javac HprsPurchase.java
$ jar cf HprsPurcahse.jar HprsPurchase.class
$ sudo cp HprsPurchase.jar $CATALINA_HOME/common/lib
I modified the CLASSPATH for the new jarfile and restarted tomcat.
You know, I've created function libraries on numerous platforms and this jarfile thing keeps stumping me!
<%@ page import="hprsPurchase.HprsPurchase"%>
ASKER
An error occurred at line: 21 in the generated java file
Only a type can be imported. hprsPurchase.HprsPurchase resolves to a package
Only a type can be imported. hprsPurchase.HprsPurchase resolves to a package
No - it resolves to a type (as long as you used the code i posted)hprsPurchase.HprsPurchase resolves to a package
ASKER
Hmmm, I must not have posted my reply ... try again ...
I believe I have exactly the code you suggested. See my code in post 39751597, above. Is that not exactly what you have? So, why do I get the "hprsPurchase.HprsPurchase
I believe I have exactly the code you suggested. See my code in post 39751597, above. Is that not exactly what you have? So, why do I get the "hprsPurchase.HprsPurchase
Can you please post the result of the following command?
jar tf HprsPurchase.jar
ASKER
$ jar tf /srv/tomcat/common/lib/Hpr
META-INF/
META-INF/MANIFEST.MF
HprsPurchase.class
META-INF/
META-INF/MANIFEST.MF
HprsPurchase.class
That's wrong. You need to jar from above the package directory (hprsPurchase)
ASKER
Don't understand. Please explain further
hprsPurchase/HprsPurchase.class
So your command should be
jar cf hprsPurchase.jar hprsPurchase
ASKER
OK, didn't know about the directory structure thing ...
Stiil no joy :(
$ jar tf /srv/tomcat/common/lib/hpr
META-INF/
META-INF/MANIFEST.MF
hprsPurchase/
hprsPurchase/HprsPurchase.
Relavant jsp lines:
If I change to <%@ page import="hprsPurchase.HprsP
the import error goes away but I still get:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
Stiil no joy :(
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 21 in the generated java file
Only a type can be imported. hprsPurchase.HprsPurchase resolves to a package
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
$ jar tf /srv/tomcat/common/lib/hpr
META-INF/
META-INF/MANIFEST.MF
hprsPurchase/
hprsPurchase/HprsPurchase.
Relavant jsp lines:
<%@ page import="hprsPurchase.HprsPurchase" %>
Date now = HprsPurchase.snagFinalPaymentDate();
If I change to <%@ page import="hprsPurchase.HprsP
the import error goes away but I still get:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
If I change to <%@ page import="hprsPurchase.HprsPurchase.*" %> // wildcard
the import error goes away
That doesn't make sense, but you could of course do
<%@ page import="hprsPurchase.*" %>
ASKER
Even when I do that [wildcard] I still get the error:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
So, still not working. Any ideas?
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
So, still not working. Any ideas?
I think you should perhaps post a link to the jar file itself so i can take a look at it
Alternatively you can use THIS
Alternatively you can use THIS
ASKER
Got the same error using your jarfile. I had to add the wildcard to eliminate the import error:
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
I've posted my jarfile and source code: http://www.novatec-inc.com:/pub/hprsPurchase.zip
An error occurred at line: 192 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
I've posted my jarfile and source code: http://www.novatec-inc.com:/pub/hprsPurchase.zip
ASKER
And here is a stripped down version of the .jsp program:
Can you get this and the jarfile working together?
<%@ page import="java.util.Date" %>
<%@ page import="HprsPurchase.HprsPurchase.*" %>
<html>
<body>
<%
Date now = HprsPurchase.snagFinalPaymentDate();
%>
</body>
</html>
Can you get this and the jarfile working together?
In which directory did you put your jar?
ASKER
$CATALINA_HOME/common/lib.
I may have rather stupidly put the wrong jarfile in the zipfile link I sent you. The one that is the same as in the above ls is http://www.novatec-inc.com/pub/HprsPurchase.jar
The java source code in the zipfile is the current version.
$ cd $CATALINA_HOME/common/lib
1 01:20:35 root@webserver:/srv/tomcat/common/lib
$ ls -ltr
total 1192
-rw-r-xr-x 1 root root 253122 2007-09-29 17:10 sqljdbc.jar*
-rw-r-xr-x 1 root root 57779 2009-01-09 12:16 commons-fileupload-1.2.1.jar*
-rw-r-xr-x 1 root root 109043 2009-01-10 09:01 commons-io-1.4.jar*
-rw-r-xr-x 1 root root 466359 2009-07-14 06:36 sqljdbc4.jar*
-rwxr-xr-x 1 root root 14146 2013-09-30 12:56 opencsv-2.3.jar*
-rwxr-xr-x 1 root root 284220 2013-12-19 04:12 commons-lang-2.6.jar*
-rwxr-xr-x 1 root root 833 2014-01-04 12:37 HprsPurchase.jar*
I may have rather stupidly put the wrong jarfile in the zipfile link I sent you. The one that is the same as in the above ls is http://www.novatec-inc.com/pub/HprsPurchase.jar
The java source code in the zipfile is the current version.
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ASKER
This jarfile (if I ever succeed in creating it) is not specific to one webapp. I've got several webapps, plus numerous regular java batch programs that I'd like to use this eventual jarfile. All the other 3rd party jarfiles reside in $CATALINA_HOME/common/lib,
Otherwise, do you have any other ideas or are you stumped too?
Otherwise, do you have any other ideas or are you stumped too?
Oh OK. That's different, so yes it can stay there.
I don't see what's wrong now. Try deleting the compiled jsps and restarting the container
I don't see what's wrong now. Try deleting the compiled jsps and restarting the container
ASKER
Deleted the finalPaymentReport_jsp.jav
An error occurred at line: 6 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
Do you have linux/tomcat? If so, on your end, try putting my one-line snagFinalPaymentDate() function (post ID 39751144 into a jarfile and referencing it from my one-line jsp (post ID: 39756456) and see if you can get it to work. I don't think we can get much simpler than that. If you get it working, post the step-by-step for me. If it works for you but doesn't work for me then there must be something awry with my java/tomcat setup. Otherwise, I think we're just guessing at this point.
An error occurred at line: 6 in the jsp file: /finalPaymentReport.jsp
HprsPurchase cannot be resolved
Do you have linux/tomcat? If so, on your end, try putting my one-line snagFinalPaymentDate() function (post ID 39751144 into a jarfile and referencing it from my one-line jsp (post ID: 39756456) and see if you can get it to work. I don't think we can get much simpler than that. If you get it working, post the step-by-step for me. If it works for you but doesn't work for me then there must be something awry with my java/tomcat setup. Otherwise, I think we're just guessing at this point.
is of course wrong. It should be<%@ page import="java.util.Date" %> <%@ page import="HprsPurchase.HprsPurchase.*" %> <html> <body> <% Date now = HprsPurchase.snagFinalPaymentDate(); %> </body> </html>
<%@ page import="hprsPurchase.*" %>
ASKER
Huh, for some reason some of my posts are not getting posted. Maybe I'm fogetting to 'post' after reviewing. To repeat my post from yesterday:
I think you are right about the jar needing to be in WEB-INF/lib. I made a symlink from there to $CATALINA_HOME/common/lib/
and my jsp file is:
That worked. This jarfile now also works with a java program:
So, I think the initial problem is solved. I will post another question later about why $CATALINA_HOME/comm/lib is not seen by tomcat, but that's a separate issue.
I think you are right about the jar needing to be in WEB-INF/lib. I made a symlink from there to $CATALINA_HOME/common/lib/
$ jar tvf /srv/tomcat/common/lib/HprsPurchase.jar
0 Sat Jan 04 14:26:18 EST 2014 META-INF/
68 Sat Jan 04 14:26:18 EST 2014 META-INF/MANIFEST.MF
0 Sat Jan 04 14:24:54 EST 2014 hprsPurchase/
326 Sat Jan 04 14:24:54 EST 2014 hprsPurchase/HprsPurchase.class
and my jsp file is:
<%@ page import="java.util.Date" %>
<%@ page import="hprsPurchase.*" %>
<html>
<body>
<%
Date now = HprsPurchase.snagFinalPaymentDate();
out.println(now);
%>
</body>
</html>
That worked. This jarfile now also works with a java program:
import hprsPurchase.*;
:
Date now = HprsPurchase.snagFinalPaymentDate();
System.out.println(now);
So, I think the initial problem is solved. I will post another question later about why $CATALINA_HOME/comm/lib is not seen by tomcat, but that's a separate issue.
ASKER
Thanks for working this through with me. That was painful!
I think you are right about the jar needing to be in WEB-INF/lib. I made a symlink from thereMaking a symlink could be dodgy. It could cause classloading problems
ASKER
I'll post a separate question about tomcat and where it looks for jars. I don't want to have to have a copy of the same jarfile in all webapps' WEB-INF/lib folders AND a copy somewhere for java program.
No - it's ok to have it in Tomcat common. The bad bit is the symlink