oos图片浏览器无法直接预览

设置Content-type之后终于得到解决，下面是相关代码（使用kotlin）：

private fun MultipartFile.savePic(folderName:String = "pic"):String {
    fun getExtension(): String {
        val extension = this.originalFilename.orEmpty().substringAfterLast(".", "")
        return if (extension.isEmpty()) {
            ""
        } else
            ".$extension"
    }

    // 添加 ContentType (添加后可在浏览器中直接浏览，而非下载链接)
    val objectMetadata = ObjectMetadata()
    objectMetadata.contentType = "image/jpg"

    val objName = "$folderName/${UUID.randomUUID()}${getExtension()}"
    try {
        ossClient.putObject(bucketName, objName, this.inputStream, objectMetadata)
    } catch (e: Exception) {
        logger.error("上传图片失败", e)
        throw BadRequestException("上传图片失败")
    }
    return objName
}