Java调用Linux命令的方法

String[] command = {
"/bin/sh",
"-c",
"whoami"
};

Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec(command);

process.waitFor();

StringBuffer sb = new StringBuffer();
BufferedReader reader= new BufferedReader(new InputStreamReader(process.getInputStream()));
String message=new String("");
while((message=reader.readLine())!=null){
sb.append(message);
}

System.out.println(sb.toString());