java获取linux指令的返回值

public static String getInfo(){
        try {
            String[] cmd = new String[] { "jps" };
            Process ps = Runtime.getRuntime().exec(cmd);

            BufferedReader br = new BufferedReader(new InputStreamReader(ps.getInputStream()));
            StringBuffer sb = new StringBuffer();
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line).append("\n");
            }
            String result = sb.toString();

            log.info(result);
            return result;

        } catch (Exception e) {
           
            e.printStackTrace();
            return "";

        }
    }