各位大佬 用 Microsoft Speech API做文字转语音 Java怎么选择语音库啊？？？

Question

Dispatch voiceItems=Dispatch.call(spVoice,"GetVoices").toDispatch();
            int count=Integer.valueOf(Dispatch.call(voiceItems,"Count").toString());
            if(count>0)
            {
                Dispatch voiceItem=Dispatch.call(voiceItems,"Item",new Variant(this.voice)).toDispatch();
                Dispatch.put(spVoice,"Voice",voiceItem);
            }

上面这段代码会报下面这个错是怎么回事？？

A COM exception has been encountered:
At Invoke of: Voice
Description: 80020003 / 找不到成员。

com.jacob.com.ComFailException: A COM exception has been encountered:
At Invoke of: Voice
Description: 80020003 / 找不到成员。