背景:最近项目中,一个新人说自己写的文件上传和下载有点儿问题,什么问题呢,就是一个文件上传到阿里云OSS后,文件名都是正常的,但是从阿里云上下载之后,文件名前面代了一个下划线(_),有点儿莫名其妙。
如图:
研究了一下他的代码,之后,发现有点儿问题,具体说就是没有设置正确的contentType. 全部设置成了file。
解决方法如下:
设置不同的contentType
/** * Description: 判断OSS服务文件上传时文件的contentType * @param filenameExtension 文件后缀 * @return String */ public static String getContentType(String filenameExtension) { String contentType = ""; switch(filenameExtension.toUpperCase()) { case "BMP": contentType = "image/bmp";break; case "GIF": contentType = "image/gif";break; case "JPEG": case "JPG": contentType = "image/jpg"; break; case "PNG": contentType = "image/png";break; case "HTML": contentType = "text/html";break; case "TXT": contentType = "text/plain";break; case "VSD": contentType = "application/vnd.visio";break; case "PPTX": case "PPT": contentType = "application/vnd.ms-powerpoint";break; case "DOCX": contentType = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";break; case "DOC": contentType = "application/msword";break; case "XLSX": contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";break; case "XLS": contentType = "application/vnd.ms-excel";break; case "XML": contentType = "text/xml";break; case "PDF": contentType = "application/pdf";break; default:contentType="file"; } return contentType; }
需要根据具体的文件类型来设置contentType,而不是全部设置为file
设置之后,上传文件到阿里云OSS,再下载,完美解决!
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