Process pro = Runtime.getRuntime.exec("cmd")
InputStream is = pro.getInputStream();
InputStream isES = pro.getErrorStream();
OutputStream os = pro.getOutputStream();
String sCmd="yourcommand";//such as dir
os.write( sCmd.getBytes() );
//然后你从is和isES中可以得到数据
//用此方法可以实现windows上的telnet