【JavaWeb】服务器转发和客户端重定向

1.服务器转发

（1）原理

（2）演示

demo06

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("demo06……");
		//服务器内部转发
        request.getRequestDispatcher("demo07").forward(request,response);
    }

demo07

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("demo07……");
    }

启动项目访问demo06，只有一次请求，URL地址不变

2.客户端重定向

（1）原理

（2）演示

demo06
使用response

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("demo06……");
        response.sendRedirect("demo07");
    }

demo07

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("demo07……");
    }

启动项目访问demo06，客户端两次请求，URL地址变为demo07