mysql Hibernate异常：java。lang.IllegalArgumentException:枚举类的未知名称值[]

Question

我已经将Mysql数据库中的一列映射到java中的enum。但表列（手动创建）中有无效项，而我用java创建的枚举中没有。当我尝试加载条目时，我得到以下异常。当数据库中的列中有无效条目时，是否可以抑制此异常，即将枚举设置为“null”

java.lang.IllegalArgumentException: Unknown name value [] for enum class [model.enums.PeriodUnit]
at org.hibernate.type.EnumType$NamedEnumValueMapper.fromName(EnumType.java:467)
at org.hibernate.type.EnumType$NamedEnumValueMapper.getValue(EnumType.java:452)
at org.hibernate.type.EnumType.nullSafeGet(EnumType.java:107)
at org.hibernate.type.CustomType.nullSafeGet(CustomType.java:127)
at org.hibernate.type.AbstractType.hydrate(AbstractType.java:106)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2912)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1673)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1605)
at org.hibernate.loader.Loader.getRow(Loader.java:1505)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:713)
at org.hibernate.loader.Loader.processResultSet(Loader.java:943)
at org.hibernate.loader.Loader.doQuery(Loader.java:911)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:312)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2238)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:65)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:674)
at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:85)
at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1849)
at org.hibernate.collection.internal.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:681)
at org.hibernate.engine.internal.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:1030)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:347)
at org.hibernate.loader.Loader.doList(Loader.java:2526)
at org.hibernate.loader.Loader.doList(Loader.java:2512)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2342)
at org.hibernate.loader.Loader.list(Loader.java:2337)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:495)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:357)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1269)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)

Answer 1

我也遇到了类似的问题，尽管我的字段被正确地标注为@Enumerated

问题如下——应用于数据库的模式DDL将列类型定义为CHARACTER（5），而在带注释的hibernate实体中，它的定义如下，默认为VARCHAR

@Column
@Enumerated(EnumType.String)
private CustomEnumType customEnumType; 

我将Postgres中的数据库def更改为customEnumType的VARCHAR。您还可以尝试更改列的元数据，方法是将其定义为其他类型，并在db级别进行相同的更改

简而言之，确保数据库表列定义符合hibernate的预期