获取客户端的IP地址 :
String ip = request.getRemoteAddr();
获取服务器的名称和端口号:
String ip=request.getServerName();
String port=request.getServerPort();
获取UA :
String ua = request.getHeader("User-Agent");
获取来源:
String refer = request.getHeader("Referer");
获取内网IP:
String innerIP = request.getHeader("x-forwarded-for");