java执行Linux命令的方法

本文实例讲述了java执行Linux命令的方法。分享给大家供大家参考。具体实现方法如下：

public class StreamGobbler extends Thread {  

      

    InputStream is;  

    String type;  

  

    public StreamGobbler(InputStream is, String type) {  

        this.is = is;  

        this.type = type;  

    }  

  

    public void run() {  

        try {  

            InputStreamReader isr = new InputStreamReader(is);  

            BufferedReader br = new BufferedReader(isr);  

            String line = null;  

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

                if (type.equals("Error")) {  

                    System.out.println("Error   :" + line);  

                } else {  

                    System.out.println("Debug:" + line);  

                }  

            }  

        } catch (IOException ioe) {  

            ioe.printStackTrace();  

        }  

    }  

}  

private void shell(String cmd)

{

        String[] cmds = { "/bin/sh", "-c", cmd };

        Process process;

        try

        {

            process = Runtime.getRuntime().exec(cmds);
            StreamGobbler errorGobbler = new StreamGobbler(process.getErrorStream(), "Error");

            StreamGobbler outputGobbler = new StreamGobbler(process.getInputStream(), "Output");

            errorGobbler.start();

            outputGobbler.start();

            try

            {

                process.waitFor();

            }

            catch (InterruptedException e)

            {

                e.printStackTrace();

            }

        }

        catch (IOException e)

        {

            e.printStackTrace();

        }

}

其中参数 cmd 为Linux命令。每次只能执行一条命令。

1.Java Runtime.exec()注意事项：

① 永远要在调用waitFor()方法之前读取数据流
② 永远要先从标准错误流中读取，然后再读取标准输出流

2.最好的执行系统命令的方法就是写个bat文件或是shell脚本。

希望本文所述对大家的Java程序设计有所帮助。