Servlet HTTP method GET is not supported HTTP 405

写好一个Servlet后访问时抛出"HTTP method GET is not supported by this URL"的错误，先是自己找了一下原因，后又在网络查找相关的原因后找到解决方案。

问题的原因是用Eclipse生成Servlet时，会在doGet和doPost自动添加默认调用父类的构造方法，如下红色标识代码:

/**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        super.doGet(request, response);
    }
    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        super.doPost(request, response);
    }

这个时候就会有个问题，如果直接调用父类的方法，就相当于父类HttpServlet的doGet或doPost方法覆盖了你重写的方法，而父类 HttpServlet的doGet或doPost方法的默认实现是返回状态代码为405的HTTP错误，表示对于指定资源的请求方法不被允许。删除以上 代码当中调用父类的方法后问题迎刃而解。

原文：http://my.oschina.net/alexgaoyh/blog/333004