新增机器人指令控制

src/main/java/com/yutou/bilibili/interfaces/DownloadInterface.java

@@ -1,6 +1,9 @@
 package com.yutou.bilibili.interfaces;
 
+import java.io.File;
+
 public abstract class DownloadInterface {
-    public void onDownload(String file){};
+    public void onDownloading(double soFarBytes, double totalBytes){};
+    public void onDownload(File file){};
     public void onError(Exception e){};
 }