java - Hibernate 从 3 个 SerializedBlob 类迁移到 4 个 SerializedBlob 类 已弃用

Question

我最近正在将我的 Hibernate 项目从版本 3 迁移到版本 4。我相信 Hibernate 4 中已弃用“SerializedBlob”类。Hibernate 4 中“SerializedBlob”的等效类是什么。我在工作区中遇到错误。下面放置示例代码片段。请建议我解决方案。提前致谢

Query query = session.createSQLQuery(sql.toString().replaceAll("PROCESS_NAME"," wfactivity.PROCESS_NAME"))
                                                        .setFirstResult(firstResult)
                                                        .setMaxResults(maxResult+1);
    List blobList = query.list();
    try {
        for (Object arr : blobList) {
                SerializableBlob blob = null;

            if (arr.getClass().isArray()) {
                blob = (SerializableBlob) Array.get(arr, 0);
            } else {
                blob = (SerializableBlob) arr;
            }

            WfActivity wfActivity = new WfActivity();
            int bytes = (int) blob.length();
            wfActivity.setDataStructure(blob.getBytes(1L, bytes));
            resultList.add(wfActivity);
        }
    } catch (SQLException exp) {
        logger.info("Error occured while converting Blob object to java byte[].........."+exp.getMessage());
    }

Answer 1

在新的 Hibernate 中，有一种参数化类型，称为 org.hibernate.type.SerializesToBlob 类型。

也看看这个答案: How to express a Serializable Blob type in a hibernate mapping file