Java执行外部命令，并把结果回显到控制台

public static void main(String args) {
//test.bat中的命令是ipconfig/all

try {
p = Runtime.getRuntime().exec(cmd);
InputStream fis=p.getInputStream();
InputStreamReader isr=new InputStreamReader(fis);
BufferedReader br=new BufferedReader(isr);
//直到读完为止
System.out.println(line);
} catch (IOException e) {
}
}