Root URl of the servlet

Question

I want to get the root url of my web application from one of the servlet.

If I deploy my application in \"www.mydomain.com\" I want to get the root url like \"http:/

Answer 1

1. Write a scriptlet in the welcome file to capture the root path. I assume index.jsp is the default file. So put the following code in that

   <% RootContextUtil rootCtx = RootContextUtil.getInstance(); if( rootCtx.getRootURL()==null ){ String url = request.getRequestURL().toString(); String uri = request.getRequestURI(); String root = url.substring( 0, url.indexOf(uri) ); rootCtx.setRootURL( root ); } %>

2. Use this variable wherever needed within the application directly by calling the value as

String rootUrl = RootContextUtil.getInstance().getRootURL();

NOTE: No need to worry about protocols/ports/etc.. Hope this helps every one