@Override
public AbstractResponse onTextMessage(TextRequest text) throws WeixinException {
// 回复文本消息，除此以外，还可以以回复语音、图片、新闻等等
String help = controller.findHelp("接收到文本消息");
help = help.replaceFirst("%str%", text.Content);
help = help.replaceFirst("%length%", String.valueOf(text.Content.length()));
return buildTextResponse(help);
}