java获取linux主机名

朱雀 2023-06-23 14:23 188阅读 0赞

/**
         * <获取主机名>
         *
         * @return 主机名
         * @throws
         */
        public static String getHostname()
        {
            String command = "hostname";
            Reader reader = null;
            BufferedReader bufferedReader = null;
            InputStream inputStream = null;
            List<String> cmdOutput = new ArrayList<>();
            String line = null;
            String hostname = null;
            try
            {
                Process process = Runtime.getRuntime().exec(command);
                inputStream = process.getInputStream();
                reader = new InputStreamReader(inputStream);
                bufferedReader = new BufferedReader(reader);
    
                while ((line = bufferedReader.readLine()) != null)
                {
                    cmdOutput.add(line);
                }
                LOGGER.info("cmdOutput is {}", cmdOutput);
                if (null != cmdOutput && cmdOutput.size() > 0)
                {
                    hostname = cmdOutput.get(0).replaceAll(" ", "");
                }
    
                process.waitFor();
    
                return hostname;
            }
            catch (Exception ex)
            {
                LOGGER.error("get hostname error. cause:", ex);
                return null;
            }
            finally
            {
                try
                {
                    if (null != inputStream)
                    {
                        inputStream.close();
                    }
                    if (null != reader)
                    {
                        reader.close();
                    }
                    if (null != bufferedReader)
                    {
                        bufferedReader.close();
                    }
                }
                catch (IOException e)
                {
                    LOGGER.error("close inputstream error. cause:", e);
                }
            }
        }