java代码获取ip地址

public class IpTool {

    public static void main(String[] args) {

        IpTool ipTool=new IpTool();

        System.out.println(ipTool.getLocalIP());

    }

    /**

     * 

     * 判斷當前操作是否Windows.

     * 

     * @return true---是Windows操作系統

     */



    private  boolean isWindowsOS() {



        boolean isWindowsOS = false;

        String osName = System.getProperty("os.name");

        if (osName.toLowerCase().indexOf("windows") > -1) {



            isWindowsOS = true;



        }

        return isWindowsOS;



    }

    /**

     * 

     * 獲取本機IP地址，並自動區分Windows還是Linux操作系統

     * 

     * 

     * 

     * @return String

     */



    public String getLocalIP() {

        String sIP = "";

        InetAddress ip = null;

        try {

            // 如果是Windows操作系統

            if (isWindowsOS()) {

                ip = InetAddress.getLocalHost();

            }

            // 如果是Linux操作系統

            else {

                boolean bFindIP = false;

                Enumeration<NetworkInterface> netInterfaces = (Enumeration<NetworkInterface>) NetworkInterface

                .getNetworkInterfaces();

                while (netInterfaces.hasMoreElements()) {

                    if (bFindIP) {

                        break;

                    }

                    NetworkInterface ni = (NetworkInterface) netInterfaces

                    .nextElement();

                    // ----------特定情況，可以考慮用ni.getName判斷

                    // 遍歷所有ip

                    Enumeration<InetAddress> ips = ni.getInetAddresses();

                    while (ips.hasMoreElements()) {

                        ip = (InetAddress) ips.nextElement();

                        if (ip.isSiteLocalAddress() && !ip.isLoopbackAddress() // 127.開頭的都是lookback地址

                                && ip.getHostAddress().indexOf(":") == -1) {

                            bFindIP = true;

                            break;

                        }



                    }



                }



            }



        } catch (Exception e) {



            e.printStackTrace();



        }



        if (null != ip) {



            sIP = ip.getHostAddress();



        }



        return sIP;



    }

}