直接執行在環境變數path的命令 可能會報錯

Java 會找/bin下面的命令執行

命令路徑要寫絕對的....!!!!  比如/bin/sh 代替 sh

執行命令方法

public static String exec(String cmd) {

System.out.println(cmd);
StringBuffer msg = null;
try {
//Process procS = Runtime.getRuntime().exec("source /etc/profile");
//procS.waitFor(); // 阻塞，直到上述命令執行完
Process proc = Runtime.getRuntime().exec(cmd);
int code = proc.waitFor(); // 阻塞，直到上述命令執行完
System.out.println(code);
msg = new StringBuffer();
String line;
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
while ((line = bufferedReader.readLine()) != null){
msg.append(line);
}
bufferedReader.close();

System.out.println(msg.toString());
//int code = proc.waitFor();
return msg.toString();
} catch (Exception e) {
e.printStackTrace();
}

return null;
}