优化导出数据集bug

ruoyi-modules/management-platform/src/main/java/com/ruoyi/platform/service/impl/NewDatasetServiceImpl.java

@@ -233,7 +233,7 @@ public class NewDatasetServiceImpl implements NewDatasetService {
 
         if (Constant.Source_Hand_Export.equals(datasetVo.getDatasetSource())) {
             String bucketName = sourcePath.split("/")[0];
-            String root_path = sourcePath.split("/")[1];
+            String root_path = sourcePath.substring(bucketName.length() + 1);
             minioUtil.downloadFiles(bucketName, root_path, datasetPath);
         } else {
             dvcUtils.moveFiles(sourcePath, datasetPath);