java获取客服端信息的方法(系统，浏览器等)

String agent = request.getHeader("user-agent"); 
System.out.println(agent); 
StringTokenizer st = new StringTokenizer(agent,";"); 
st.nextToken(); 
String userbrowser = st.nextToken(); 
System.out.println(userbrowser); 
String useros = st.nextToken(); 
System.out.println(useros); 
System.out.println(System.getProperty("os.name")); //win2003竟然是win xp？ 
System.out.println(System.getProperty("os.version")); 
System.out.println(System.getProperty("os.arch")); 
System.out.println(request.getHeader("user-agent")); //返回客户端浏览器的版本号、类型 
System.out.println(request.getMethod()); //：获得客户端向服务器端传送数据的方法有get、post、put等类型 
System.out.println(request.getRequestURI()); //：获得发出请求字符串的客户端地址 
System.out.println(request.getServletPath()); //：获得客户端所请求的脚本文件的文件路径 
System.out.println(request.getServerName()); //：获得服务器的名字 
System.out.println(request.getServerPort()); //：获得服务器的端口号 
System.out.println(request.getRemoteAddr()); //：获得客户端的ip地址 
System.out.println(request.getRemoteHost()); //：获得客户端电脑的名字，若失败，则返回客户端电脑的ip地址
System.out.println(request.getProtocol()); //： 
System.out.println(request.getHeaderNames()); //：返回所有request header的名字，结果集是一个enumeration（枚举）类的实例 
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"));