web工程中各类地址的写法

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
        //1,地址是给服务器用的  
        request.getRequestDispatcher("/foot.jsp").forward(request,response);  
        //2,地址是给浏览器用的  
        response.sendRedirect("/day06/foot.jsp");  
        //3,服务器  
        this.getServletContext().getRealPath("/foot.jsp");  
        //4,服务器  
        this.getServletContext().getResourceAsStream("/public/head.jsp");  
        //5,给浏览器  
        /* 
            <a href="/day06/foot.jsp">xxxxx</a> 
            <form action="/day06/head.jsp"></form> 
         
        */  
    }