public static String getIfconfigIP()
  {
    BufferedReader in = null;
    String outline = "";
    // timeOut window为ms linux 为s
    Runtime r = Runtime.getRuntime(); // 将要执行的ping命令,此命令是windows格式的命令
    String pingCommand = " curl ifconfig.me ";// windows系统
    String os = System.getProperty("os.name").toLowerCase();
    if (os.indexOf("linux") >= 0)
    {
      pingCommand = " curl ifconfig.me ";
    }
    if (os.indexOf("mac") >= 0)
    {
      pingCommand = " curl ifconfig.me ";
    }
    try
    { // 执行命令并获取输出
      System.out.println(pingCommand);
      Process p = r.exec(pingCommand);
      if (p == null)
      {
        return "cmd failed";
      }
      in = new BufferedReader(new InputStreamReader(p.getInputStream())); // 逐行检查输出,计算类似出现=23ms
      // TTL=62字样的次数
      int connectedCount = 0;
      String line = null;
 
      while ((line = in.readLine()) != null)
      {
        outline += line;
      }
      return outline;
    }
    catch (Exception ex)
    {
      ex.printStackTrace(); // 出现异常则返回假
      return outline;
    }
    finally
    {
      try
      {
        in.close();
      }
      catch (IOException e)
      {
        e.printStackTrace();
      }
    }
 
  }

p = require('child_process')
   .spawnSync('curl', ['ifconfig.io'])
   .stdout
   .toString()
   .trim()