hibernate继承映射出现异常,帮忙看下拉~ 啥也不说了 100分
public class Employee {
/**用户标识**/
private Integer id;
/**员工用户名**/
private String username;
/**员工名字**/
private String name;
/**员工密码**/
private String password;
/**电话**/
private Integer phone;
/**最近登入IP**/
private String ip;
/**生日**/
private Date birthday;
}
/**
*组长
***/
public class HeadMan extends Employee{
private Set<Spreader> spreaders;
private Set<Hospital> hospitals;
public class Spreader {
/**所属组长**/
private HeadMan headMan;
/**所属医院部门**/
private Division diversion;
/**推广的关键词**/
private Set<Keyword> keywords;
以上 默认构造器和get set方法省略了..
employee.bhm.xml 文件如下
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Hibernate映射文件的根元素 -->
<hibernate-mapping package="com.heping.oa.entity.main">
<class name="Employee" table="hp_employee">
<cache usage="read-only"/>
<id name="id" type="java.lang.Integer" column="emp_id"><generator class="identity"/></id>
<property name="name" column="emp_name" type="string" not-null="true" unique="true" length="64"/>
<property name="username" column="emp_username" type="string" not-null="true" unique="true" length="64"/>
<property name="password" column="emp_password" type="string" not-null="true" length="64"/>
<property name="phone" column="emp_phone" type="integer" unique="true" not-null="true" length="32"/>
<property name="ip" column="emp_ip" type="integer" length="32" />
<property name="birthday" column="emp_birthday" type="timestamp"/>
<joined-subclass name="com.heping.oa.entity.main.Spreader" table="hp_spreader">
<key column="emp_id"/>
<many-to-one name="headMan" column="headman_id" class="Spreader"></many-to-one>
<many-to-one name="division" column="division_id" class="Division"></many-to-one>
<set name="keywords" inverse="true" table="hp_keyword" cascade="sava-update">
<cache usage="read-write" />
<key column="emp_id" />
<one-to-many class="com.heping.oa.entity.main.Keyword" />
</set>
</joined-subclass>
<joined-subclass name="com.heping.oa.entity.main.HeadMan" table="hp_headman">
<key column="emp_id" />
<set name="spreaders" inverse="true" cascade="delete">
<cache usage="read-write" />
<key column="emp_id" />
<one-to-many class="com.heping.oa.entity.main.Spreader"/>
</set>
<set name="hospitals" inverse="true" cascade="delete">
<cache usage="read-write" />
<key column="emp_id" />
<one-to-many class="com.heping.oa.entity.main.Hospital" />
</set>
</joined-subclass>
</class>
</hibernate-mapping>
出现的异常信息如下
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.JoinedSubclassEntityPersister
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1102)
at com.heping.oa.hibernate.SpringHibernateTest.setUp(SpringHibernateTest.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.JoinedSubclassEntityPersister
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:381)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1750)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1788)
at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:242)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:372)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:357)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
... 30 more
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.heping.oa.entity.main.Employee.id
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:187)
at org.hibernate.engine.internal.UnsavedValueFactory.getUnsavedIdentifierValue(UnsavedValueFactory.java:68)
at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:75)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:145)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:505)
at org.hibernate.persister.entity.JoinedSubclassEntityPersister.<init>(JoinedSubclassEntityPersister.java:131)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
... 39 more
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:164)
... 49 more
个人觉得 是 Employee id映射出现问题了 我jioned-subclass那里获取不到,我不知道怎么解决了...
我的hibernate版本是 4.1.7 数据库是 mysql 驱动版本是 5.1.8 知道的帮忙解答下拉~ ths~~~ hibernate
[解决办法]
有没有实例化spring容器，web.xml看看
[解决办法]
Spreader 既然作为joined-class写进去了，为什么不继承Employee？
你Spreader类里没有继承，自然没有id这个属性，但是你配置文件中可写了<key column="emp_id"/>那没有id它往哪里放值？