request的一些方法

HttpServletRequest req = (HttpServletRequest) request;
      
      String context = ((HttpServletRequest) request).getContextPath().toString(); // 工程名    如：/fileUpload
      
      String uri = ((HttpServletRequest) request).getRequestURI().toString(); // 不包含域名的url  如：/fileUpload/index.jsp
      String url = ((HttpServletRequest) request).getRequestURL().toString(); // 完整url  如：http://localhost:8080/fileUpload/index.jsp
      
      String path = uri.substring(context.length());   // 访问路径   如： /index.jsp
      
      
      String host    = req.getRemoteHost();  // 获得客户端的主机名。
      String addr    = req.getRemoteAddr();  // 获得客户端的ip地址
      int portRemote = req.getRemotePort();  // 返回发出请求的客户机的端口号。
      String user    = req.getRemoteUser();  
      
      String prot    = req.getScheme();      // 协议名
      String sn      = req.getServerName();  // 服务器域名
      String server  = req.getServletPath(); // 同path
      String user1   = req.getLocalAddr();   // 服务器ip
      int user2      = req.getLocalPort();   // 服务器端口
      int port       = req.getServerPort();  // 应用端口
      String p       = req.getProtocol();    // HTTP1.1
      String params  = req.getQueryString(); //返回请求行中的参数部分,？号后的字符串参数
      Map map        = req.getParameterMap();// 以map形式返回参数
    
    
      String headerParam1 =req.getHeader("x-forwarded-for"); // 获取请求头中的数据
      
      // 请求头 
      String ua   = req.getHeader("User-Agent"); //Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36
      String ref  = req.getHeader("referer");  // 获取来源url（从这个url对应的页面跳转过来的）
      req.getServletContext();
      String realPath = req.getServletContext().getRealPath("/");
      
      
      
      Set paramKeySet = req.getParameterMap().keySet();
      String keyString = paramKeySet.toString();
      
      HttpSession session = req.getSession();

      if(keyString.indexOf("{")!= -1 || keyString.indexOf(":")!= -1 || keyString.indexOf("debug")!= -1 || keyString.indexOf("redirect")!= -1){
        throw new RuntimeException("===恶意连接:参数包含{或\":\"或dubug或redirect");

      }