修复使用透明底png图片时，自动填充黑色背景

RuoYi

2022-10-28 6421f68964fe242a682557651b1ae94dbb656c81

 ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileUtils.java

@@ -244,6 +244,7 @@
                .append(percentEncodedFileName);



        response.setHeader("Content-disposition", contentDispositionValue.toString());

        response.setHeader("download-filename", percentEncodedFileName);

    }



    /**