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

public static String getBaseUrl(HttpServletRequest request) {
    String scheme = request.getScheme();
    String host = request.getServerName();
    int port = request.getServerPort();
    String contextPath = request.getContextPath();

    String baseUrl = scheme + "://" + host + ((("http".equals(scheme) && port == 80) || ("https".equals(scheme) && port == 443)) ? "" : ":" + port) + contextPath;
    return baseUrl;
}