Frontdan gelen base64 file contenti mail de attachment kimi gondermek
String cnt = attachmentDto.getContent(); int index = cnt.indexOf(",") + 1; // cnt = cnt.replaceFirst("^data:image/[^;]*;base64,?", ""); cnt = cnt.substring(index); byte[] bytes = javax.xml.bind.DatatypeConverter.parseBase64Binary(cnt); mimeMessageHelper.addAttachment( attachmentDto.getName(), new ByteArrayResource(bytes) );