书籍页添加下载部分；获取URL参数考虑带#锚点情况；解决页面重复获取压缩字体问题

bookshelfplus/src/main/java/plus/bookshelf/Service/Service/FileService.java

@@ -7,6 +7,17 @@ import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
 public interface FileService {
+    /**
+     * 列出文件支持的下载方式
+     *
+     * @param bookId
+     * @return
+     * @throws InvocationTargetException
+     * @throws IllegalAccessException
+     * @throws BusinessException
+     */
+    List<FileModel> getFile(Integer bookId) throws InvocationTargetException, IllegalAccessException, BusinessException;
+
     /**
      * 列出所有文件
      *