How to get the previous page URL from request in servlet after dispatcher.forward(request, response)

Question

I\'m using the servlet which redirects me with the help of

dispatcher.forward(request, response);

in the end. But after this I want to get

Answer 1

Any method will return source URL when you do forward(..) so my solution is to define a filter to store the requestURL() in a request attribute to check later. To do this in your web.xml write:

...

    MyFilter
    my.package.CustomFilter


    MyFilter
    *

...

Then in CustomFilter class:

public class CustomFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {}

    @Override
    public void destroy() {}

    @Override
    public void doFilter(ServletRequest req, ServletResponse rsp,
            FilterChain chain) throws IOException, ServletException {
        req.setAttribute("OriginURL", req.getRequestURL().toString());
        chain.doFilter(req, rsp);
    }
}

Then you can get it everywhere in your code with ServletRequest object with:

request.getAttribute("OriginURL").toString();