public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.getWriter().print(request.getScheme()+"<br/>");//获取请求协议
response.getWriter().print(request.getServerName()+"<br/>");//获取服务器名称
response.getWriter().print(request.getServerPort()+"<br/>");//获取服务器端口号
response.getWriter().print(request.getContextPath()+"<br/>");//项目名称
response.getWriter().print(request.getServletPath()+"<br/>");//获取Servlet路径
response.getWriter().print(request.getQueryString()+"<br/>");//获取参数部分
response.getWriter().print(request.getRequestURI()+"<br/>");//获取URI=项目名称+Servlet路径
response.getWriter().print(request.getRequestURL()+"<br/>");//获取URL
}