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我試圖將POJO類映射到mysql數據庫表。該表尚不存在。我使用以下映射文件。無法在Hibernate映射中實例化自定義類型錯誤枚舉映射
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="sor.hibernate.actors.User" table="testuser" catalog="test">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="increment" />
</id>
<property name="username" type="java.lang.String">
<column name="username" length="30" />
</property>
<property name="password" type="java.lang.String">
<column name="password" length="128" />
</property>
<property name='userLevel'>
<type name="org.hibernate.type.EnumType">
<param name="UserLevel">sor.hibernate.acotrs.UserLevel</param>
</type>
</property>
<property name="registrationDate" type="java.lang.Date">
<column name="regDate" length="10" />
</property>
<property name="birthday" type="java.lang.Date">
<column name="birthday" length="10" />
</property>
</class>
</hibernate-mapping>
User類是下面（我刪除了accesor方法，但它們中的代碼存在！）：
public class User {
private long id;
private String username;
private String password;
private UserLevel userLevel;
private Date birthday;
private Date registrationDate;
}
枚舉類如下：
public enum UserLevel {
GUEST,
SUSPENDED,
SUBSCRIBER,
CLERK;
private UserLevel() {
// TODO Auto-generated constructor stub
}
}
的我遇到的錯誤是：
23-dic-2012 12.56.24 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
23-dic-2012 12.56.24 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.4.Final}
23-dic-2012 12.56.24 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
23-dic-2012 12.56.24 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
23-dic-2012 12.56.24 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
23-dic-2012 12.56.24 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: sor/hibernate/actors/User.hbm.xml
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
%%%% Error Creating SessionFactory %%%%
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:296)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:289)
at org.hibernate.mapping.Property.isValid(Property.java:238)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:468)
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:1736)
at sor.hibernate.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:34)
at tests.FirstTest.main(FirstTest.java:22)
Caused by: java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:170)
at org.hibernate.type.EnumType.setParameterValues(EnumType.java:173)
at org.hibernate.type.TypeFactory.injectParameters(TypeFactory.java:131)
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:189)
... 12 more
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: sor/hibernate/actors/User.hbm.xml
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration$MappingsImpl addImport
INFO: HHH000071: Duplicate import: sor.hibernate.actors.User -> sor.hibernate.actors.User
23-dic-2012 12.56.25 org.hibernate.cfg.Configuration$MappingsImpl addImport
INFO: HHH000071: Duplicate import: sor.hibernate.actors.User -> User
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Could not parse mapping document from resource sor/hibernate/actors/User.hbm.xml
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:3409)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3398)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3386)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1341)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1731)
at sor.hibernate.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:73)
at sor.hibernate.HibernateSessionFactory.getSession(HibernateSessionFactory.java:55)
at tests.FirstTest.main(FirstTest.java:22)
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sor.hibernate.actors.User
at org.hibernate.cfg.Configuration$MappingsImpl.addClass(Configuration.java:2574)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:172)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:3406)
... 7 more
Exception in thread "main" java.lang.NullPointerException
at tests.FirstTest.main(FirstTest.java:23)
在程序運行時
Session session = HibernateSessionFactory.getSession();
Transaction tx = session.beginTransaction();
User u = new User();
u.setUsername("first");
u.setPassword("ine");
u.setUserLevel(UserLevel.CLERK);
tx.commit();
session.close();
添加的hibernate.cfg.xml
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="connection.username">root</property>
<property name="connection.password">qwerty</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="myeclipse.connection.profile">testDBdriverMySql</property>
<property name="javax.persistence.validation.mode">none</property>
<mapping resource="sor/hibernate/actors/User.hbm.xml" />
</session-factory>
</hibernate-configuration>
刪除了我的prev答案，它有助於使列名與枚舉列名關聯。 –