使用JAVA语言获取IP 和域名的功能，能够获取本机IP地址、机器名，以及远程服务器的IP地址！-Using the JAVA language functions for IP and domain, have access to the local IP address, machine name, and the remote server IP address!

获取用户真实IP地址，并根据IP地址返回用户所在的国家及城市！-Access to the user' s real IP address, and return according to the IP address of the user' s country and city!