获取客户端IP

1.

public String getRemoteIp(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;

	}