Java 的外部命令

import java.io.*;
...
        try {
            Process p = Runtime.getRuntime().exec("ls");
            String line;
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            while ((line = input.readLine()) != null)
                System.out.println(line);
            input.close();
        } catch (IOException e) {
                ...
        }
...

基本又實用... 先記下來... :P