Java执行外部命令行程序，获取命令行输出

一般来说，使用Runtime.getRuntime().exec 来执行一个外部的exe程序，通过proc.getErrorStream()和proc.getInputStream()就可以获得该程序的输出，大多数程序都可以成功获得输出。

但是，这次遇到的例子比较特殊，手动在命令行里执行caption2ass会得到以下内容：

我尝试用getErrorStream()或getInputStream()获得caption2ass.exe在命令行中的输出，却无法得到命令行中的内容。

主程序：

Runtime run = Runtime.getRuntime();
Process proc = run.exec("caption2ass.exe");
StreamGobbler errorGobbler = new StreamGobbler(
    proc.getErrorStream(), "GBK", "ERR", System.err);
StreamGobbler outputGobbler = new StreamGobbler(
    proc.getInputStream(), "GBK", "OUT", System.out);
errorGobbler.start();
outputGobbler.start();
int exitVal = proc.waitFor();
System.out.println("ExitValue: " + exitVal);

StreamGobbler.java :

public class StreamGobbler extends Thread {
InputStream in;
String charsetName;
String type;
PrintStream out;
StreamGobbler(InputStream inputStream, String charsetName, String type, PrintStream out) {
    this.in = inputStream;
    this.charsetName = charsetName;
    this.type = type;
    this.out = out;
}
@Override
public void run() {
    try {
        InputStreamReader isr = new InputStreamReader(in, charsetName);
        char[] cbuf = new char[256];
        int len = -1;
        while ( -1 != (len=isr.read(cbuf))){
            out.print(Arrays.copyOf(cbuf, len));
        }
    } catch (IOException ioe) {
        ioe.printStackTrace();
    } finally {
        IOUtils.closeQuietly(in);
    }
}

}
caption2ass下载地址 http://pan.baidu.com/s/1nuCClXR 欢迎测试