Deploying jsp into testing/staging/developement/production environment

Question

Hi,
I have a jsp, say header.jsp. It has,say 2links. All these links have different URL's based on the environment this jsp is deployed.
Snippet of JSP deployed for Test enviroment:
test_env=hostname:portnumber
contextroot=webappln
        <TD><A href="https://test_env/webappln/querystring">products</A></TD>
        <TD><A href="https://test_env/webappln/querystring">services</A></TD>
        prod_env=hostname:portnumber
contextroot=webappln
Snippet of JSP deployed for Production enviroment:
        <TD><A href="https://prod_env/webappln/querystring">products</A></TD>
        <TD><A href="https://prod_env/webappln/querystring">services</A></TD>
        Problem: For system testing, we need to deploy the code in test/staging and developement servers before it goes into production. Right now i have only one JSP. If i follow my lame procedure, i have to create 3 JSP's for each environement and deploy it in three diff env.Is there a better way?. How to eliminate the duplicate and redundant code in jsp. If the URL's change, need to change at 3 places.Its a big maintenece mess too.
Insted of making three different jsp's for each environment, i want to use single jsp and dynamically figure out the enviroment and generate the urls appropriately. That way we need to maintain only one JSP. No matter where its deployed(test/stage/dev) the URL's are dynamically generated.
Snippet of JSP which dynamically generate web resource URL's based on the Env
        //Determine the environment type
        //Generate URL's with proper hostname, port # and context root and set place holder       
       <TD><A href="https://{place holder}/querystring">products</A></TD>
       <TD><A href="https://{place holder}/querystring">services</A></TD>
        Any pointers of how to implement the above case. Any help greatly appreciated.
Thanks,
DHM

Answer 1

Check the action part of the html form tag. On problem I see is in the dev environment you had file.jsp under /jsp but in the production you have it under /dir. This could just be a typo.