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how Tomcat needs package name in front of the class after import?

Posted on 2003-11-16
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Last Modified: 2010-04-01
Dear experts,

I move my application from my machine to production server running tomcat3.1 and found some codes are not working any more.

I am getting this error:

org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
E:\apps\tomcat\work\localhost_8080%2Fpolym\_0002falign_0002dresult_00033_0002ejspalign_0002dresult3_jsp_0.java:89: Class Hashtable not found.
                      Hashtable ad = (Hashtable)request.getAttribute("disclist");


If I add package name in front of the Hashtable, it will work. So, why the import statement not working?

<%@ page
import="java.util.*"
import="java.io.*"
import="java.lang.Math"
errorPage="ExceptionHandler.jsp"
%>

Thanks. Is this a Tomcat 3 problem?
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Question by:changcy77
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8 Comments
 
LVL 15

Assisted Solution

by:jimmack
jimmack earned 80 total points
ID: 9760172
I'm not 100% certain, but I think your page directives should be more like this:

<%@ page import="java.util.*, import="java.io.*, import="java.lang.Math" %>
<%@ errorPage="ExceptionHandler.jsp" %>
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Author Comment

by:changcy77
ID: 9760670
Thanks. One thing I don't understand is the same codes work fine on my own machine...only the Tomcat version is different.
0
 
LVL 14

Accepted Solution

by:
kennethxu earned 80 total points
ID: 9765052
>> One thing I don't understand is the same codes work fine on my own machine...only the Tomcat version is different.

The jsp specification didn't say that you can specify multiple import attribute in one page directive. so it is just that the newer version is more tolerant to your mistake.

both of below compliant to jsp spec:

<%@ page import="java.util.*, import="java.io.*, import="java.lang.Math" %>

-- or --

<%@ page import="java.util.*"  %>
<%@ page import="java.io.*" %>
<%@ page import="java.lang.Math" %>

point should goes to jimmack
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LVL 15

Expert Comment

by:jimmack
ID: 9765285
Aha!  Thanks kennethxu.  I though it might be something like that, but I haven't used anything earlier than Tomcat 4, so it would only have been a guess if I had posted that ;-)

changcy77, split the points - 20 each - I might have provided a solution, but kennethxu actually explained it ;-)
0
 

Author Comment

by:changcy77
ID: 9768778
sorry, both of your answer did not work...

for <%@ page import="java.util.*, import="java.io.*, import="java.lang.Math" %>
error messages are :
org.apache.jasper.JasperException: /login.jsp(4,0) Unterminated <%@ page tag
      at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
      at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
      at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:170)
      at org.apache.jasper.compiler.

****************************************************
for <%@ page import="java.util.*"  %>
<%@ page import="java.io.*" %>

error message is

org.apache.jasper.compiler.ParseException: E:\login.jsp(5,4) Invalid directive
      at org.apache.jasper.compiler.Parser$Directive.accept(Parser.java:186)
      at org.apache.jasper.compiler.Parser.parse(Parser.java:1073)
      at org.apache.jasper.compiler.Parser.parse(Parser.java:1038)
      at org.apache.jasper.compiler.Parser.parse(Parser.java:1034)
      at org.apache.jasper.compiler.Compiler.compile(Compiler.java:182)
0
 
LVL 15

Expert Comment

by:jimmack
ID: 9769915
login.jsp shouldn't be in E:\  It should be in the webapps\polym directory along with your other JSPs.
0
 
LVL 14

Expert Comment

by:kennethxu
ID: 9772668
my bad, didn't check exactly
>> <%@ page import="java.util.*, import="java.io.*, import="java.lang.Math" %>
this is incorrect and it should be:
<%@ page import="java.util.*, java.io.*, java.lang.Math" %>

if you still have problem, post your code and we'll fix it for you.
0
 
LVL 14

Expert Comment

by:kennethxu
ID: 9772819
I have just tested on Tomcat 3.2 and 3.3 ( don't have 3.1 on hand) both import works!

<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%=new Date() %><p>
<%=new IOException( "works?" )%>

-- or --

<%@ page import="java.io.*, java.util.*" %>
<%=new Date() %><p>
<%=new IOException( "works?" )%>
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