获取ip地址的工具类

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

public class IPUtils {
	private static Logger logger = LoggerFactory.getLogger(IPUtils.class);
	public static String getIpAddr() {
		HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
		String ip = null;
		try {
			ip = request.getHeader("x-forwarded-for");
					if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
						ip = request.getHeader("Proxy-Client-IP");
					}
					if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
						ip = request.getHeader("WL-Proxy-Client-IP");
					}
					if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
						ip = request.getHeader("HTTP_CLIENT_IP");
					}
					if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
						ip = request.getHeader("HTTP_X_FORWARDED_FOR");
					}
					if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
						ip = request.getRemoteAddr();
					}
		} catch (Exception e) {
			logger.error("IPUtils ERROR ", e);
		}
		return ip;
	}
}