How to add variables into WEB-INF/web.xml or META-INF/*.* ?

[Ilkka Heinonen <il...@vtt.fi>]

Hello everyone.

 

I should want to add variables like ”ODBC” name into
%Tomcat-webapps%/WEB_INF/web.xml. How can you do it? How do you use it in
java code (jsp, servlet, basic class).

 

Some examples that I need to make parametric: 

-        JDBC/ODBC name

-        Official Project name

-        Project description

-        Project logo location

 

Do you have the way how to make this true?

How u can use variable values in java code?

 

 

Thanks in advance….

 -Ilkka Heinonen-



 

Re: How to add variables into WEB-INF/web.xml or META-INF/*.* ?

[Ben Souther <bs...@fwdco.com>]

One more thing...

This question belongs in the Tomcat User's List.
The dev list is for people who are building Tomcat.


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Re: How to add variables into WEB-INF/web.xml or META-INF/*.* ?

[Ben Souther <bs...@fwdco.com>]

I should want to add variables like ODBC name into
> %Tomcat-webapps%/WEB_INF/web.xml. How can you do it? How do you use it in
> java code (jsp, servlet, basic class).

You will want to read up on context initialization parameters and
servlet initialization parameters.

For a context init param (application wide) you would enter
something like this in your web.xml file:

  <context-param>
    <param-name>
      welcome-message
    </param-name>
    <param-value>
      The value of this message is stored in a context init param
    </param-value>
  </context-param>
                                                                                                  
Then to retrieve the parameter from a servlet:
getServletContext().getInitParameter("welcome-message"));

or from a JSP:
<%=application.getInitParameter("welcome-message")%>


If you're interested, there is an example app you can download at:
http://simple.souther.us

look for Simple Context Init Params






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