将 servlet 请求转发到 java 中的 a.html 文件？

Question

Basically I have servlet named forward . When a request is made to it, it forwards the request to a.html file like this:

@WebServlet("/forward")
public class forward extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.getRequestDispatcher("/videos/forward.html").forward(request, response);
        return;
    }
}

The problem is that when I test this on eclipse when a request is made to this servlet, it responds with the link as localhost/videos/forward.html

But then when I deployed it with name com.war Now when a request is made to it, it responds with localhost/com/videos/forward.html

How can I make the requestDispatcher to respond with localhost/videos/forward.html and not as localhost/com/videos/forward.html

Answer 1

No you cannot. Forwarding is a request made to the servlet container to pass control to another servlet in same servlet context. A JSP page in indeed implemented as a servlet, but a HTML is just a ressource, so you cannot forward to it.

But you can redirect to it. A redirection works by sending a special response telling the browser that it should go to that other URL. As it works at browser level, you can redirect to a HTML page or even to a completely different site.

You can use the sendRedirect method from HttpServletResponse to initiate a redirection from a servlet:

@WebServlet("/forward")
public class forward extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.sendRedirect("/videos/forward.html");
        return;
    }
}

Answer 2

只需编写response.sendRedirect（pagename.html）

Answer 3

Yes, u can. use:

RequestDispatcher r = req.getRequestDispatcher(String arg);