从request中获取IP

package cn.hancloud.magic.util;


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

/**
 * @author cong
 * @date 2018年08月28日 14:22
 * @desc 获取用户IP工具类
 */
public class IpAdrressUtil {
	/**
	 * 获取Ip地址
	 * @param request
	 * @return
	 */
	/**
	 * 获取当前网络ip
	 * @param request
	 * @return
	 */
	public static String getIpAddr(HttpServletRequest request){
		String ipAddress = request.getHeader("x-forwarded-for");
		if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("Proxy-Client-IP");
		}
		if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("WL-Proxy-Client-IP");
		}
		if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getRemoteAddr();
			if("127.0.0.1".equals(ipAddress) || "0:0:0:0:0:0:0:1".equals(ipAddress)){
				//根据网卡取本机配置的IP
				InetAddress inet=null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
				ipAddress= inet.getHostAddress();
			}
		}
		//对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if(ipAddress!=null && ipAddress.length()>15){
			if(ipAddress.indexOf(",")>0){
				ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
			}
		}
		return ipAddress;
	}
}