Java獲取IP

// 獲取訪問者的IP
public static String getIpAddress(HttpServletRequest request) {
    String ip = null;
    // X-Forwarded-For：Squid 服務代理
    String ipAddresses = request.getHeader("X-Forwarded-For");
    if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        
 
// Proxy-Client-IP：apache 服務代理
        ipAddresses = request.getHeader("Proxy-Client-IP");
    }
    if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        // WL-Proxy-Client-IP：weblogic 服務代理
        ipAddresses = request.getHeader("WL-Proxy-Client-IP");
    }
    
 
if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        // HTTP_CLIENT_IP：有些代理伺服器
        ipAddresses = request.getHeader("HTTP_CLIENT_IP");
    }
    if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        
 
// X-Real-IP：nginx服務代理
        ipAddresses = request.getHeader("X-Real-IP");
    }
    // 有些網路通過多層代理，那麼獲取到的ip就會有多個，一般都是通過逗號（,）分割開來，並且第一個ip為客戶端的真實IP
    if (ipAddresses != null && ipAddresses.length() != 0) {
        ip = ipAddresses.split(",")[0];
    }
    // 還是不能獲取到，最後再通過request.getRemoteAddr();獲取
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        ip = request.getRemoteAddr();
    }
    return ip.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;
}

// 獲取自己本機電腦的所有IP
public static List<String> getMyAddress() {
    List<String> rs = new ArrayList<String>();
    try {
        Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();//獲取本地所有網路介面
        while (en.hasMoreElements()) {//遍歷列舉中的每一個元素
            NetworkInterface ni= (NetworkInterface) en.nextElement();
            Enumeration<InetAddress> enumInetAddr = ni.getInetAddresses();
            while (enumInetAddr.hasMoreElements()) {
                InetAddress inetAddress = (InetAddress) enumInetAddr.nextElement();
                if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && inetAddress.isSiteLocalAddress()) {
                    // sb.append("name:" + inetAddress.getHostName().toString() + "\n");
                    rs.add(inetAddress.getHostAddress().toString());
                }
            }
        }
    } catch (SocketException e) {}
    return rs;
}