import javax.servlet.http.HttpServletRequest;

/**

 * 根据HttpServletRequest请求获取发出请求浏览器客户端所在服务器的IP地址

 * @author 【】

 *

 */

public class IPUtil {

	/*

	 * 第一种方法

	 */

	public 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;

	}

	/*

	 * 第二种方法

	 */

	public String getIP(HttpServletRequest request) {

		String remoteAddr = request.getRemoteAddr();

		String forwarded = request.getHeader("X-Forwarded-For");

		String realIp = request.getHeader("X-Real-IP");

		String ip = null;

		if (realIp == null) {

		    if (forwarded == null) {

		        ip = remoteAddr;

		    } else {

		        ip = remoteAddr + "/" + forwarded.split(",")[0];

		    }

		} else {

		    if (realIp.equals(forwarded)) {

		        ip = realIp;

		    } else {

		        if(forwarded != null){

		            forwarded = forwarded.split(",")[0];

		        }

		        ip = realIp + "/" + forwarded;

		    }

		}

		return ip;

	}

}