Java获取本机外网ip地址的方法-蒲公英云

Java获取本机外网ip地址的方法

短命女 2022-06-14 03:58 642阅读 0赞

Java获取外网IP地址的方法

获取本地IP地址的方法

public static String getLocalAddress(){
    String ip = "";
    try {
        ip = InetAddress.getLocalHost().getHostAddress();
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return ip;
}

获取外网本机的IP地址的方法

一种可行的获取方法，是通过http请求从网站中取出ip字段。例如：http://ip.chinaz.com/

通过这个网址，加上简单的正则表达式，即可得到。

public static String getV4IP(){
    String ip = "";
    String chinaz = "http://ip.chinaz.com";
    StringBuilder inputLine = new StringBuilder();
    String read = "";
    URL url = null;
    HttpURLConnection urlConnection = null;
    BufferedReader in = null;
    try {
        url = new URL(chinaz);
        urlConnection = (HttpURLConnection) url.openConnection();
        in = new BufferedReader( new InputStreamReader(urlConnection.getInputStream(),"UTF-8"));
        while((read=in.readLine())!=null){
            inputLine.append(read+"\r\n");
        }
        //System.out.println(inputLine.toString());
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }finally{
        if(in!=null){
            try {
                in.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    Pattern p = Pattern.compile("\\<dd class\\=\"fz24\">(.*?)\\<\\/dd>");
    Matcher m = p.matcher(inputLine.toString());
    if(m.find()){
        String ipstr = m.group(1);
        ip = ipstr;
        //System.out.println(ipstr);
    }
    return ip;
 } 参考博客： http://blog.csdn.NET/dugucanjian/article/details/47378063