You can manage and perform operations on objects in buckets by using OSS SDK for Java. References Determine whether an object exists (OSS SDK for Java 1.0) Manage object ACLs (OSS SDK for Java 1.0) Manage object metadata (OSS SDK for Java 1.0) Convert the storage classes of objects (OSS SDK for Java 1.0) List objects (OSS SDK for Java 1.0) Query objects (OSS SDK for Java 1.0) Delete objects (OSS SDK for Java 1.0) Copy objects (Java SDK V1) Restore objects (OSS SDK for Java 1.0) Manage symbolic links using OSS SDK for Java 1.0