jsp获得访问者来源和request.getHeader方法的内容   

System.out.println("Protocol: " + request.getProtocol());

    System.out.println("Scheme: " + request.getScheme());

    System.out.println("Server Name: " + request.getServerName() );

    System.out.println("Server Port: " + request.getServerPort());

    System.out.println("Protocol: " + request.getProtocol());

    System.out.println("Server Info: " + getServletConfig().getServletContext().getServerInfo());

    System.out.println("Remote Addr: " + request.getRemoteAddr());

    System.out.println("Remote Host: " + request.getRemoteHost());

    System.out.println("Character Encoding: " + request.getCharacterEncoding());

    System.out.println("Content Length: " + request.getContentLength());

    System.out.println("Content Type: "+ request.getContentType());

    System.out.println("Auth Type: " + request.getAuthType());

    System.out.println("HTTP Method: " + request.getMethod());

    System.out.println("Path Info: " + request.getPathInfo());

    System.out.println("Path Trans: " + request.getPathTranslated());

    System.out.println("Query String: " + request.getQueryString());

    System.out.println("Remote User: " + request.getRemoteUser());

    System.out.println("Session Id: " + request.getRequestedSessionId());

    System.out.println("Request URI: " + request.getRequestURI());

    System.out.println("Servlet Path: " + request.getServletPath());

    System.out.println("Accept: " + request.getHeader("Accept"));

    System.out.println("Host: " + request.getHeader("Host"));

    System.out.println("Referer : " + request.getHeader("Referer"));

    System.out.println("Accept-Language : " + request.getHeader("Accept-Language"));

    System.out.println("Accept-Encoding : " + request.getHeader("Accept-Encoding"));

    System.out.println("User-Agent : " + request.getHeader("User-Agent"));

    System.out.println("Connection : " + request.getHeader("Connection"));

    System.out.println("Cookie : " + request.getHeader("Cookie"));

    System.out.println("Created : " + session.getCreationTime());

    System.out.println("LastAccessed : " + session.getLastAccessedTime());