org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save():
异常原因:
<id>元素配置不正确,<id>元素缺少其子元素<generator></generator>的配置。
解决方法:
<id>元素映射了相应数据库表的主键字段,对其子元素<generator class="">,其中class的取值可以为increment、identity、sequence、hilo、native……等,更多的可参考hibernate参考文档,一般取其值为native 功能是适应本地数据库。
exp:
<hibernate-mapping>
<class name="com.fqf.Vipdata" table="vipdata" catalog="test">
<id name="vipId" type="java.lang.Integer">
<column name="vipId" />
<generator class="assigned" />
</id>
<property name="vipName" type="java.lang.String">
<column name="vipName" length="20" not-null="true" />
</property>
<property name="vipTitle" type="java.lang.String">
<column name="vipTitle" length="20" not-null="true" />
</property>
</class>
</hibernate-mapping>
看看数据库表中的 id 是不是自增长类型,把<generator class="assigned" />中assigned改为increment
(vipId的类型为自增长)
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