//獲取請(qǐng)求頭數(shù)據(jù)
        String Method =req.getMethod();  //獲取請(qǐng)求方式
        System.out.println(Method);
        //獲取請(qǐng)求URL
        StringBuffer url=req.getRequestURL();
        System.out.println(url);
        //獲取請(qǐng)求URI
        String uri=req.getRequestURI();
        System.out.println(uri);
        //獲取協(xié)議
        String h=req.getScheme();
        System.out.println(h);
        
        
        //獲取請(qǐng)求行的數(shù)據(jù)
        //獲取所有的請(qǐng)求行的枚舉
        Enumeration s=req.getHeaderNames();
        while(s.hasMoreElements()){
            String name=(String) s.nextElement();
            String values=req.getHeader(name);//通過鍵獲取值
            System.out.println(values);
        }
        
        
        //獲取用戶數(shù)據(jù)
        //返回指定的用戶數(shù)據(jù)
        String ss=req.getParameter("fav");
        //返回鍵相同    值不相同的數(shù)據(jù)
        String[] sss=   req.getParameterValues("fav");
        //獲取所有的用戶數(shù)據(jù)的枚舉集合
        Enumeration ssss=req.getParameterNames();

//響應(yīng)頭  
//      resp.setHeader("content-type","text/html;charset=utf-8");
//      resp.addHeader("123","5525");
        resp.setContentType("text/html;charset=utf-8");
        //響應(yīng)碼
//      resp.sendError(404,"this is a question");
        //相應(yīng)實(shí)體
        resp.getWriter().write("<b>我是中國人</b>");