fix

src/main/java/cn/com/qmth/examcloud/web/filestorage/impl/AliyunFileStorageImpl.java

@@ -423,7 +423,7 @@ public class AliyunFileStorageImpl implements FileStorage {
 	@Override
 	public YunPathInfo saveFile(String siteId, FileStoragePathEnvInfo env, InputStream in, String md5) {
 		try {
-			String relativePath = uploadObject(siteId, env, in, null);
+			String relativePath = uploadObject(siteId, env, in, md5);
 			AliyunSite as = AliyunSiteManager.getAliyunSite(siteId);
 			AliYunAccount ac = AliyunSiteManager.getAliYunAccountByAliyunId(as.getAliyunId());
 			String url=FileStorageHelper.getUrl(ac.getDomain(), relativePath);