Java Hibernate枚举类型实例化异常
我正在使用Hibernate4和基于xml的映射。这是我得到的一个例外Java Hibernate枚举类型实例化异常,java,hibernate,Java,Hibernate,我正在使用Hibernate4和基于xml的映射。这是我得到的一个例外 Caused by: org.hibernate.MappingException: Unable to instantiate custom type: org.hibernate.type.EnumType at org.hibernate.type.TypeFactory.custom(TypeFactory.java:193) at org.hibernate.type.TypeFactory.cus
Caused by: org.hibernate.MappingException: Unable to instantiate custom type: org.hibernate.type.EnumType
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:193)
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:179)
at org.hibernate.type.TypeFactory.byClass(TypeFactory.java:103)
at org.hibernate.type.TypeResolver.heuristicType(TypeResolver.java:130)
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:307)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:294)
at org.hibernate.mapping.Property.isValid(Property.java:238)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:469)
at org.hibernate.mapping.RootClass.validate(RootClass.java:270)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1294)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1742)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1788)
at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:189)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:350)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:335)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$6.run(AbstractAutowireCapableBeanFactory.java:1504)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1502)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
... 35 more
Caused by: java.lang.NullPointerException
at org.hibernate.type.EnumType.setParameterValues(EnumType.java:153)
at org.hibernate.type.TypeFactory.injectParameters(TypeFactory.java:131)
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:189)
... 53 more
这是我正在使用的枚举映射
<property name="coachingStatus" column="status" update="true" insert="true" index="true">
<type name="org.hibernate.type.EnumType">
<param name="enumClass">com.tutorial.enums.CoachingStatus</param>
<param name="type">12</param>
</type>
</property>
这是实体
public class Coaching implements Serializable {
private Integer id;
private String name;
private Long locationId;
private Integer organisationId;
private Long ownerId;
private Date createdOn;
private Date modifiedOn;
private CoachingStatus coachingStatus;
private Long createdBy;
private Long modifiedBy;
private String email;
private String logo;
private String about;
private String phone;
... //getters and setters
}
我在这里查阅了教程,但我发现了上面的错误。需要这方面的帮助。我也遇到了同样的问题,解决方案似乎是添加另一个参数。这样,它就不会试图将其作为序号而作为字符串来持久化,所以我想字符串在VARCHAR类型下工作得更好
<property name="coachingStatus" column="status" update="true" insert="true" index="true">
<type name="org.hibernate.type.EnumType">
<param name="enumClass">com.tutorial.enums.CoachingStatus</param>
<param name="type">12</param>
<param name="useNamed">true</param>
</type>
</property>
com.tutorial.enums.CoachingStatus
12
真的
通过将
useNamed
设置为true
hibernate将使用枚举的名称来存储它,这样当您更改枚举类型的顺序时,您的数据不会中断。您是否在实体中为此hbm.xml
文件声明了CoachingStatus状态
变量是。我将在问题中添加实体。
<property name="coachingStatus" column="status" update="true" insert="true" index="true">
<type name="org.hibernate.type.EnumType">
<param name="enumClass">com.tutorial.enums.CoachingStatus</param>
<param name="type">12</param>
<param name="useNamed">true</param>
</type>
</property>