java如何运行linux命令

• javac TestRunTime.java
• java TestRunTime hostname // 执行“hostname”Linux命令
• 即可看到输出

public class TestRunTime {

    public static void main(String[] args) throws IOException, InterruptedException {
        String cmd = "";

        if(args == null || args.length == 0){
            System.out.println("请输入命令行参数");
        }else{

            for(int i=0;i<args.length; i++){
                cmd += args[i] + " ";
            }
        }


        try {
            Process process = Runtime.getRuntime().exec(cmd);

            InputStreamReader ir = new InputStreamReader(process.getInputStream());
            LineNumberReader input = new LineNumberReader(ir);

            String line;
            while ((line = input.readLine()) != null) {
                System.out.println(line);
            }
        } catch (java.io.IOException e) {
            System.err.println("IOException " + e.getMessage());
        }
    }
}