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：

 

复制代码代码如下:

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。