Servlet跳转工具

package prj.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.*;

public class MyDispatcherServlet extends HttpServlet {
    private static final long   serialVersionUID = 1L;
    private static final String path = "/views/index.jsp";

    public void service(HttpServletRequest req, HttpServletResponse resp) 
        throws ServletException, IOException {
        String _uri = req.getRequestURI().substring(req.getContextPath().length());
           if (_uri != null) {
                super.getServletContext().getRequestDispatcher(_uri.equals("/") ? path : path.replaceAll("index", 
               _uri.replaceAll("^/|;.*", "").replaceAll("/$", ""))
                ).forward(req, resp);
           return;
        }
        resp.getWriter().print("fail!");
    }
}