图片转换成base64码进行显示

tuoheng-admin/src/main/java/com/tuoheng/admin/service/impl/ReportServiceImpl.java

             //response.setCharacterEncoding("utf-8");
             //定义下载的类型
             //response.setContentType("application/msword;charset=GBK");
-            response.setContentType("application/octet-stream;");
+            response.setContentType("application/octet-stream");
             OutputStream out;
             File files = new File(filePath,"");