javax.servlet.ServletException：org.hibernate.MappingException：未知實體：com.example.Person

我使用hibernate與mysql，但是當我創建了webapplication並將其部署到glassfish上時我得到了這個錯誤javax.servlet.ServletException：org.hibernate.MappingException：未知實體：com.example.Person

[2014-02-19T18:30:54.170+0100] [glassfish 4.0] [WARNING] [] [javax.enterprise.web] [tid: _ThreadID=19 _ThreadName=http-listener-1(1)] [timeMillis: 1392831054170] [levelValue: 900] [[ 
    StandardWrapperValve[FacesServlet]: Servlet.service() for servlet FacesServlet threw exception 
org.hibernate.MappingException: Unknown entity: com.example.Person 
    at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:693) 
    at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1485) 
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:120) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210) 
    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195) 
    at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) 
    at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697) 
    at com.example.personManager.addPerson(personManager.java:30) 
    at com.example.PersonFormBean.addPerson(PersonFormBean.java:38) 
    at com.example.PersonFormBean$Proxy$_$$_WeldClientProxy.addPerson(Unknown Source) 
    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:606) 
    at com.sun.el.parser.AstValue.invoke(AstValue.java:275) 
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) 
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) 
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) 
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87) 
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:315) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) 
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) 
    at java.lang.Thread.run(Thread.java:744) 
]]

我Person類看起來是這樣的：

package com.example; 


import java.io.Serializable; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 



@Entity 
public class Person implements Serializable{ 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 
    @Id 
    private int id; 
    private String name; 
    private int yob; 



    public Person() { 
    } 
    public Person(String name, int yob) { 
     super(); 
     this.name = name; 
     this.yob = yob; 
    } 
    public int getId() { 
     return id; 
    } 
    public void setId(int id) { 
     this.id = id; 
    } 
    public String getName() { 
     return name; 
    } 
    public void setName(String name) { 
     this.name = name; 
    } 
    public int getYob() { 
     return yob; 
    } 
    public void setYob(int yob) { 
     this.yob = yob; 
    } 


}

人經理：

package com.example; 

import java.util.List; 

import org.hibernate.Query; 
import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.cfg.AnnotationConfiguration; 
import org.hibernate.cfg.Configuration; 

public class personManager { 

    SessionFactory sessionFactory; 
    Session session; 
    Configuration configuration; 

    public personManager() { 
     try { 
      configuration = new AnnotationConfiguration(); 
      configuration.addAnnotatedClass(Person.class).configure().buildSessionFactory(); 
      sessionFactory = configuration.addAnnotatedClass(Person.class).configure().buildSessionFactory(); 

      session = sessionFactory.openSession(); 
     } catch (Throwable ex) { 
      System.err.println("Initial SessionFactory creation failed." + ex); 
      throw new ExceptionInInitializerError(ex); 
     } 
    } 

    public void addPerson(Person p) { 
     session.beginTransaction(); 
     session.save(p); 
     try { 

      session.getTransaction().commit(); 
     } catch (Throwable ex) { 
      System.err.println("Saving failed." + ex); 
      session.getTransaction().rollback(); 
      throw new ExceptionInInitializerError(ex); 
     } 
    } 

    public void deletePerson(Person p) { 
     session.beginTransaction(); 
     session.delete(p); 
     try { 

      session.getTransaction().commit(); 
     } catch (Throwable ex) { 
      System.err.println("Saving failed." + ex); 
      session.getTransaction().rollback(); 
      throw new ExceptionInInitializerError(ex); 
     } 
    } 

    @SuppressWarnings("unchecked") 
    public List<Person> getAll() { 
     session.beginTransaction(); 
     Query query = session.createQuery("select p from com.example.Person p"); 
     List<Person> result; 
     result = query.list(); 
     return result; 
    } 

}

和personFormBean：

package com.example; 

import java.io.Serializable; 

import javax.enterprise.context.SessionScoped; 
import javax.faces.model.ListDataModel; 
import javax.inject.Named; 

@SessionScoped 
@Named("personBean") 
public class PersonFormBean implements Serializable{ 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 

    private Person person = new Person(); 

    private ListDataModel<Person> persons = new ListDataModel<Person>(); 

    private personManager pm = new personManager(); 

    public Person getPerson() { 
     return person; 
    } 

    public void setPerson(Person person) { 
     this.person = person; 
    } 

    public ListDataModel<Person> getAllPersons(){ 
     persons.setWrappedData(pm.getAll()); 
     return persons; 
    } 

    public String addPerson(){ 
     pm.addPerson(person); 
     return null; 
    } 

    public String deletePerson(){ 
     Person personToDelete=persons.getRowData(); 
     pm.deletePerson(personToDelete); 
     return null; 

    } 

}

，這是我的Hibernate配置文件：

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 
     <property name="hibernate.bytecode.use_reflection_optimizer">false</property> 
     <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
     <property name="hibernate.connection.password">password</property> 
     <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property> 
     <property name="hibernate.connection.username">root</property> 
     <property name="hibernate.connection.password">michal12</property> 
     <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property> 
     <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> 
     <property name="show_sql">true</property> 
     <property name="javax.persistence.validation.mode">none</property> 
     <property name="hibernate.hbm2ddl.auto">update</property> 
     <mapping class="com.example.Person"/> 
    </session-factory> 
</hibernate-configuration>

有人知道什麼是錯在這裏嗎？我會非常感謝您的幫助。

來源

2014-02-19 user3329879

您的實體未被Hibernate掃描。使用在會話工廠

<property name="packagesToScan" value="com.example" />

或

configuration.addPackage(packagesToScan);

並添加@GeneratedValue到實體的id領域。

來源

2014-02-19 21:55:46 farvilain

我做了兩件事情，仍然無法正常工作。 – user3329879

我不習慣Java的Hibernate或其他配置。我建議你讓所有構造函數的日誌類似「我用依賴創建的：」+ ....然後你可以看到。我有另一個問題是：你的XML加載到哪裏？ – farvilain

哪個xml？在hibernate.cfg.xml？它與com.example包一起被加載到src中。或者你的意思是其他的XML文件？ – user3329879

javax.servlet.ServletException：org.hibernate.MappingException：未知實體：com.example.Person

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