fix:调整了无头浏览器的流程：需要手动调用关闭浏览器方法

fix:调整了下载文件判断，如果下载结束后文件不存在则抛异常

src/main/java/com/yutou/qqbot/MessageEvent/AdminMessage.java

@@ -10,6 +10,7 @@ import com.yutou.qqbot.models.WebSign.ZhuZhu;
 import com.yutou.qqbot.utlis.AppTools;
 import com.yutou.qqbot.utlis.Log;
 import com.yutou.qqbot.utlis.StringUtils;
+import com.yutou.qqbot.utlis.WebClient;
 
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
@@ -235,6 +236,7 @@ public class AdminMessage extends Message {
                     }
                     QQBotManager.getInstance().sendMessage(qq,builder.toString());
                 }
+                WebClient.getInstance().quit();
             }
         }
     }