获取初始化参数

 

 在web中插入这个文件

获取完然后拿取文件

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    ServletContext context=this.getServletContext();
    String url=context.getInitParameter("url");

    resp.getWriter().print(url);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    doGet(req,resp);
}

 请求转发

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    System.out.println("输出一句话进去01");
    ServletContext context=this.getServletContext();
    //RequestDispatcher requestDispatcher =context.getRequestDispatcher("/nf");
   //requestDispatcher.forward(req,resp);
    context.getRequestDispatcher("/fn").forward(req,resp);


}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    doGet(req,resp);//调用forword实现请求转发

}