hibernate 异常

1.异常：org.hibernate.AnnotationException: No identifier specified for entity异常。

entity类是必须要主键的，否则就会报出这个异常。
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name = "id", nullable = false)
    private Integer id;

2.异常：exception just for purpose of providing stack trace

count(*) 返回的结果为Long类型，而非Integer

3.异常 org.hibernate.UnknownEntityTypeException

在使用spring的orm时，entity类没在hibernate sessionFactory的扫描中，导致。@entity要使用javax的entity而不是hibernate的。

    <bean id="sessionFactory"

        class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">

        <property name="dataSource" ref="dataSource" />

        <property name="packagesToScan">

            <list>

                <!-- 可以加多个包 -->

                <value>com.test.common.entity</value>

            </list>

        </property>

        <property name="hibernateProperties">

            <props>

                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>

                <prop key="hibernate.dialect">${hibernate.dialect}</prop>

                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>

                <prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate5.SpringSessionContext</prop>

                <prop key="hibernate.format_sql">true</prop>

            </props>

        </property>

    </bean>

4. org.hibernate.HibernateException: identifier of an instance of com..DO was altered from 27 to null

出现这样的异常是从get中获取do对象，在进行更新前，将主键id给置为null导致。注意 BeanUtils.copyProperties，会将导入对象的null也给导入过来。

5. org.hibernate.HibernateException:Multiple references to database, sequence [**] were encountered attempting toset conflict values for initial value

出现的原因是在entity中有两个重复的实体类对应了sequence,多见于实体类重命名后mvn没有重新clean导致。 mvn clean package

巴特西

hibernate 异常

1.异常：org.hibernate.AnnotationException: No identifier specified for entity异常。

2.异常：exception just for purpose of providing stack trace

3.异常 org.hibernate.UnknownEntityTypeException

4. org.hibernate.HibernateException: identifier of an instance of com..DO was altered from 27 to null

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巴特西

hibernate 异常

1.异常：org.hibernate.AnnotationException: No identifier specified for entity异常。

2.异常：exception just for purpose of providing stack trace

3.异常 org.hibernate.UnknownEntityTypeException

4. org.hibernate.HibernateException: identifier of an instance of com.*.*DO was altered from 27 to null

最新文章

热门文章

4. org.hibernate.HibernateException: identifier of an instance of com..DO was altered from 27 to null