获取ip工具类-IPUtils

public class IPUtils {
    
    
	private static Logger logger = LoggerFactory.getLogger(IPUtils.class);

	/**
	 * 获取IP地址
	 * 
	 * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
	 * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
	 */
	public static String getIpAddr(HttpServletRequest request) {
    
    
    	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);
        }
        
//        //使用代理，则获取第一个IP地址
//        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
    
    
//			if(ip.indexOf(",") > 0) {
    
    
//				ip = ip.substring(0, ip.indexOf(","));
//			}
//		}
        
        return ip;
    }
	
}