java获取本地IP，http请求的IP

/**
 * @Author: Jack Wu
 * @Version:
 * @Description: 获取请求者的IP地址
 */
public class IpAdressUtils {
    public static final String DEFAULT_IP = "127.0.0.1";

    /**
     * 获取本地IP地址，直接根据第一个网卡地址作为其内网ipv4地址，避免返回 127.0.0.1
     *
     * @return
     */
    public static String getLocalIpByNetcard() {
        try {
            for (Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces(); e.hasMoreElements(); ) {
                NetworkInterface item = e.nextElement();
                for (InterfaceAddress address : item.getInterfaceAddresses()) {
                    if (item.isLoopback() || !item.isUp()) {
                        continue;
                    }
                    if (address.getAddress() instanceof Inet4Address) {
                        Inet4Address inet4Address = (Inet4Address) address.getAddress();
                        return inet4Address.getHostAddress();
                    }
                }
            }
            return InetAddress.getLocalHost().getHostAddress();
        } catch (SocketException | UnknownHostException e) {
            throw new RuntimeException(e);
        }
    }

    public static String getLocalIP() {
        try {
            return InetAddress.getLocalHost().getHostAddress();
        } catch (UnknownHostException e) {
            throw new RuntimeException(e);
        }
    }
    //根据请求获取IP地址
    public static String getIpAddress(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.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
}