import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;

public class IpUtils {

    /**
     * 獲取本機ip
     *
     * @return
     */
    public static String getIp() {
        String localip = "";
        try {
            InetAddress ip = null;
            ip = ip.getLocalHost();
            localip = ip.getHostAddress();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return localip;
    }

    /**
     * 獲取本機外網ip地址
     *
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

    /**
     * 返回本機地址(含埠)
     *
     * @param request
     * @return
     */
    public static String getAddress(HttpServletRequest request) {
        return request.getLocalAddr() + ":" + request.getLocalPort();
    }

    /**
     * 獲取請求的url地址
     * @param request
     * @return
     */
    public static String getServerAddress(HttpServletRequest request){
        return "http://" + request.getServerName() + ":" + request.getServerPort();
    }
}