how to change the requestURL using filter or servlet

Question

how to change the requestURL using filter or servlet .

for example if request is \"http://servername1:8080\" I want to change the same to \"http://servername2:7001

Answer 1

The above is a good solution compared to many others on the web that use .forward() as that breaks the filter chain. This solution allows subsequent filters to process the request after is has been modified.

But there are 2 additional methods that must implemented in order for this to be 'transparent' to downstream filter processing, and they must present the same modification of the URL to present a consistent request object. The wrapper must implement:

@Override
public String getRequestURI() {
    final String originalUri = ((HttpServletRequest)getRequest()).getRequestURI();
    return "/"; // Must be consistent with getRequestURL()
}
@Override
public String getServletPath() {
    final String originalPath = ((HttpServletRequest)getRequest()).getServletPath();
    return "/"; // Must be consistent with getRequestURL()
}