How to add veriable/enviorment variabls in web application.these are the variable you can access anywhere in project

here is solution

addfollwing tag to web xm…and given values of your own choics

<env-entry>
    <env-entry-name>webmasterEmail</env-entry-name>
    <env-entry-value>admin@domain.com</env-entry-value>
    <env-entry-type>java.lang.String</env-entry-type>
</env-entry>

you can access in a code by this

// Get a handle to the JNDI environment naming context
Context env = (Context)new InitialContext().lookup("java:comp/env");
// Get a single value
String webmasterEmail = (String)env.lookup("webmasterEmail");

thats It ...enjoyyyyyyyy

here is the helping uRL
http://wiki.metawerx.net/wiki/Web.xml.EnvEntry

comment here if it is useful for you