今天测试一个项目,这个项目使用了hibernate和spring,报错信息如下:
- org.springframework.orm.hibernate4.HibernateSystemException: identifier of an instance of com.tdr.push.entity.ThreadPushFail was altered from 1 to 1; nested exception is org.hibernate.HibernateException: identifier of an instance of com.tdr.push.entity.ThreadPushFail was altered from 1 to 1
后来发现是因为实体类中id的属性和hbm.xml配置文件中id的属性不一致造成的。
我实体类中的id属性是:
- public class ThreadPushFail {
- private long id;
- /***
- * 推送消息的id
- */
- private long pushMessageId;
hbm.xml配置文件中id的属性:
- <hibernate-mapping>
- <class name="com.tdr.push.entity.ThreadPushFail" table="t_threadPushFail" lazy="true">
- <id name="id" type="int">
- <column name="ID" precision="19" scale="0">
- <comment>主键id</comment>
- </column>
- <generator class="identity"/>
- </id>
一个是int,一个是long
解决方案:是id的属性保持一致。