上一篇文章說了一下文件上傳至oss：https://blog.csdn.net/new_programmer_h/article/details/84307005
這里說一下上傳后的一些后續操作：常用的獲取圖片縮率圖、獲取視頻截幀生成封面圖。自我感覺阿里oss對於這些處理封裝的很好，只要根據："%s|sys/saveas,o_%s,b_%s" 格式設置想要處理的方式他就會針對視頻或者圖片進行處理。
private static String endpoint = "http://oss-cn-beijing.aliyuncs.com";
private static String accessKeyId = "<yourAccessKeyId>";
private static String accessKeySecret = "<yourAccessKeySecret>";
private static String bucketName = "<yourBucketName>";
圖片上傳至oss后獲取縮率圖工具類：
/**
* 圖片處理：生成縮率圖
*
* @author LH_Yu
* @Param uploadFile 上傳文件
* @Param picturePath 原圖key
* @Param thumbPath 縮率圖上傳路徑及取出url的key
* "%s|sys/saveas,o_%s,b_%s" 具體處理格式化
*/
public static String compressPicture(MultipartFile uploadFile, String picturePath, String thumbPath) throws Exception {
// 創建OSSClient實例。
OSSClient ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
// 圖片處理持久化 : 縮放
StringBuilder sbStyle = new StringBuilder();
Formatter styleFormatter = new Formatter(sbStyle);
//設置圖片
String styleType = "image/resize,m_lfit,w_400,h_400"; //圖片設置
String targetImage = thumbPath + uploadFile.getOriginalFilename();
styleFormatter.format("%s|sys/saveas,o_%s,b_%s", styleType,
BinaryUtil.toBase64String(targetImage.getBytes()),
BinaryUtil.toBase64String(bucketName.getBytes()));
ProcessObjectRequest request = new ProcessObjectRequest(bucketName, picturePath + uploadFile.getOriginalFilename(), sbStyle.toString());
GenericResult processResult = ossClient.processObject(request);
processResult.getResponse().getContent().close();
//設置過期時間 -- 十年
Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);
String url = ossClient.generatePresignedUrl(bucketName, thumbPath + uploadFile.getOriginalFilename(), expiration).toString();
return url;
}
視頻上傳至oss后截幀獲取視頻封面圖工具類：
/**
* 視頻處理：視頻截幀生成封面圖
*
* @author LH_Yu
* @Param uploadFile 上傳文件
* @Param videoPath 原視頻key
* @Param coverPicturePath 封面圖上傳路徑及取出url的key
* "%s|sys/saveas,o_%s,b_%s" 具體處理格式化
*/
public static String coverPicture(MultipartFile uploadFile, String videoPath, String coverPicturePath) throws Exception {
// 創建OSSClient實例。
OSSClient ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
// 圖片處理持久化 : 截幀生成封面圖
StringBuilder sbStyle = new StringBuilder();
Formatter styleFormatter = new Formatter(sbStyle);
//設置圖片處理
String styleType = "video/snapshot,t_3000,f_jpg,w_800,h_0,m_fast";//視頻處理
String targetImage = coverPicturePath + uploadFile.getOriginalFilename();
styleFormatter.format("%s|sys/saveas,o_%s,b_%s", styleType,
BinaryUtil.toBase64String(targetImage.getBytes()),
BinaryUtil.toBase64String(bucketName.getBytes()));
ProcessObjectRequest request = new ProcessObjectRequest(bucketNamePrivate, videoPath + uploadFile.getOriginalFilename(), sbStyle.toString());
GenericResult processResult = ossClient.processObject(request);
processResult.getResponse().getContent().close();
//設置過期時間 -- 十年
Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);
String url = ossClient.generatePresignedUrl(bucketName, coverPicturePath + uploadFile.getOriginalFilename(), expiration).toString();
return url;
}