我有一个带注释的实体POJO,我正在尝试使用Hibernate。
该类有许多业务逻辑方法,其名称为getX
。我使用@Transient
注释注释了这些注释,示例来源如下:
import java.beans.Transient;
import java.util.Collection;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class TestEntity {
private String id;
@Id
public String getId()
{
return id;
}
public void setId(String id) {
this.id = id;
}
@Transient
public Collection<String> getAllGames()
{
return null;
}
}
然而,Hibernate似乎仍试图映射这些方法。初始化休眠时输出以下错误:
org.hibernate.MappingException:无法确定以下类型: java.util.Collection,在表:TestEntity,用于列: [org.hibernate.mapping.Column(allGames)] at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:455)at at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:422)at at org.hibernate.mapping.Property.isValid(Property.java:226)at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:597) 在org.hibernate.mapping.RootClass.validate(RootClass.java:265)at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:329) 在 org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:451) 在 org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:710) 在 org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726) ...
使用<mapping class="...">
条目配置Hibernate:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.DerbyTenSevenDialect
</property>
<property name="hibernate.connection.driver_class">
org.apache.derby.jdbc.EmbeddedDriver
</property>
<property name="hibernate.connection.url">
jdbc:derby:db
</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="show_sql">true</property>
<mapping class="TestEntity"/>
</session-factory>
</hibernate-configuration>
我正在运行Hibernate 5.2.10.Final。
为什么Hibernate会尝试映射这种瞬态方法?
答案 0 :(得分:0)
@Transient
注释包含错误:
import java.beans.Transient;
它们应来自javax.persistence
包:
import javax.persistence.Transient;
另请参阅:Do javax.persistence.transient and java.bean.transient do the same thing?