How Do I Confirm that an Upload is Successful If I Upload an Object to Overwrite an Existing Object with the Same Name in a Bucket? (SDK for Java)

After the upload is complete, you can call ObsClient.getObjectMetadata to obtain the size and last modification time of the newly uploaded object and compare them with those of the overwritten object.

If the sizes are the same and the last modification time of the new object is later than that of the overwritten object, the upload succeeded. Otherwise, the upload failed.

For details about how to call ObsClient.getObjectMetadata, see Obtaining Object Metadata (SDK for Java).