Java调用系统执行程序(OS Command)

以下代码在windows2000上可以运新哦。
SayHi.exe为任意的一个执行程序。
public static void main(String args[]) {
  String s = null;
  // system command to run
  String cmd = "cmd /c c:/SayHi.exe";
  // set the working directory for the OS command processor
  File workDir = new File("c:\\");

  try {
   Process p = Runtime.getRuntime().exec(cmd, null, workDir);
   int i = p.waitFor();
   if (i == 0) {
    BufferedReader stdInput =
     new BufferedReader(
      new InputStreamReader(p.getInputStream()));
    // read the output from the command
    while ((s = stdInput.readLine()) != null) {
     System.out.println(s);
    }
   } else {
    BufferedReader stdErr =
     new BufferedReader(
      new InputStreamReader(p.getErrorStream()));
    // read the output from the command
    while ((s = stdErr.readLine()) != null) {
     System.out.println(s);
    }

   }
  } catch (Exception e) {
   System.out.println(e);
  }
 }

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