我的休眠事务有问题。执行后，表中没有值，根本没有更新。我所有的其他更新都正常工作。
这是映射
<class name="LastDownloadedMessage" table="t_imap_lastmsguid">
<id name="id" column="id" ><generator class="increment"/></id>
<property name="lastDownloadedMessageUid"><column name="last_msg_uid" /></property>
<property name="lastUidNext"><column name="next_msg_uid" /></property>
<property name="folder"><column name="folder_name" /></property>
<property name="cred"><column name="credential" /></property>
</class>
这是 POJO 对象：
public class LastDownloadedMessage {
Integer id;
private String lastDownloadedMessageUid;
private String lastUidNext;
private String folder;
private String cred;
//GETTERS AND SETTERS HERE
public LastDownloadedMessage() {
super();
}
public LastDownloadedMessage(String lastDownloadedMessageUid,
String lastUidNext) {
super();
this.lastDownloadedMessageUid = lastDownloadedMessageUid;
this.lastUidNext = lastUidNext;
}
}
这是进行更新的功能。
Session ssn=HibernateSessionFactory.openSession();
Transaction txn = ssn.beginTransaction();
Query query = ssn.createQuery("update LastDownloadedMessage e set e.lastDownloadedMessageUid = :luid , e.lastUidNext = :nextUid where e.folder =:folder and e.cred = :cred");
query.setParameter("luid",last_downloaded_msg_uid);
query.setParameter("nextUid", uid_next);
query.setParameter("folder", folder);
query.setParameter("cred", credential);
int result = query.executeUpate();
txn.commit();
ssn.flush();
ssn.close();
该函数似乎可以正常执行，没有错误。可能是什么问题 ？