Java执行cmd命令工具类

工具类：

public class CmdTask implements Runnable {

    private String command;

    private String dirPath;

    public CmdTask(String dirPath, String command) {

        this.dirPath = dirPath;

        this.command = "cmd.exe /c " + command;;

    }

    @Override

    public void run() {

        Process process = null;

        int exitVal = 0;

        try {

            process = Runtime.getRuntime().exec(command, null, new File(dirPath));

            // Runtime.exec()创建的子进程公用父进程的流，不同平台上，父进程的stream buffer可能被打满导致子进程阻塞，从而永远无法返回。

            //针对这种情况，我们只需要将子进程的stream重定向出来即可。

            new RedirCmdStreamThread(process.getInputStream(), "INFO").start();

            new RedirCmdStreamThread(process.getErrorStream(), "ERR").start();

            exitVal = process.waitFor();

        } catch (IOException | InterruptedException e) {

            e.printStackTrace();

        }

        if (exitVal != 0) {

            throw new RuntimeException("cmd任务执行失败");

        }

    }

    class RedirCmdStreamThread extends Thread {

        InputStream is;

        String printType;

        RedirCmdStreamThread(InputStream is, String printType) {

            this.is = is;

            this.printType = printType;

        }

        public void run() {

            try {

                InputStreamReader isr = new InputStreamReader(is);

                BufferedReader br = new BufferedReader(isr);

                String line = null;

                while ((line = br.readLine()) != null) {

                    System.out.println(printType + ">" + line);

                }

            } catch (IOException ioe) {

                ioe.printStackTrace();

            }

        }

    }

}

工具类使用案例：

command = "cmd.exe /c ffmpeg -i video.m4s -i audio.m4s -codec copy " + abPath;

new CmdTask(videoPath,command).run();

巴特西

Java执行cmd命令工具类

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