实现获取命令行的返回结果

/**
 * @author liuwenlong
 * @create 2020-07-24 15:00:39
 */
@SuppressWarnings("all")
public class TestRunTime {
    public static String exeCmd(String commandStr) {
        BufferedReader br = null;
        try {
            Process p = Runtime.getRuntime().exec(commandStr);
            br = new BufferedReader(new InputStreamReader(p.getInputStream(),"gbk"));
            String line = null;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line + "\n");
            }
            return sb.toString();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return commandStr;
    }

    public static void main(String[] args) {
        String commandStr = "ping 127.0.0.1";
        System.out.println(TestRunTime.exeCmd(commandStr));
    }
}