public void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

｝

    public void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

    }

在myeclipse中新建一个Servlet，可以看到自动生成的代码中会抛出ServletException和IOException

doGet和doPost抛出的异常类型是一样的

     * @throws ServletException if an error occurred

     * @throws IOException if an error occurred

什么为什么。。。