Java JPA从oracle数据库中检索blob作为其原始文件类型

@Entity
@Table(name = "your_table_name")
public class YourEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Lob
    @Column(name = "blob_column")
    private Blob blobData;

    // 其他属性和方法
}

YourEntity entity = entityManager.find(YourEntity.class, entityId);
Blob blobData = entity.getBlobData();

InputStream inputStream = blobData.getBinaryStream();
// 将Blob数据保存为文件
FileOutputStream outputStream = new FileOutputStream("path/to/save/file");
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
    outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();