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Topic: 初学hibernate 遇到的错误

1.初学hibernate 遇到的错误

Posted by: zhb
Posted on: 2006-09-16 10:31

09:54:58,750 INFO Environment:478 - Hibernate 2.1.7
09:54:58,781 INFO Environment:507 - hibernate.properties not found
09:54:58,812 INFO Environment:538 - using CGLIB reflection optimizer
09:54:58,812 INFO Environment:567 - using JDK 1.4 java.sql.Timestamp handling
09:54:58,843 INFO Configuration:350 - Mapping resource: org/redsaga/quickstart/
Student.hbm.xml
09:54:59,906 INFO Binder:230 - Mapping class: org.redsaga.quickstart.Student ->
student
09:55:00,312 INFO Configuration:900 - configuring from resource: /hibernate.cfg
.xml
09:55:00,312 INFO Configuration:872 - Configuration resource: /hibernate.cfg.xm
l
09:55:00,437 INFO Configuration:331 - Mapping resource: org/redsaga/quickstart/
Student.hbm.xml
09:55:00,515 INFO Binder:230 - Mapping class: org.redsaga.quickstart.Student ->
student
09:55:00,515 INFO Configuration:1058 - Configured SessionFactory: null
09:55:00,515 INFO Configuration:632 - processing one-to-many association mappin
gs
09:55:00,515 INFO Configuration:641 - processing one-to-one association propert
y references
09:55:00,515 INFO Configuration:666 - processing foreign key constraints
09:55:00,625 INFO Dialect:86 - Using dialect: net.sf.hibernate.dialect.MySQLDia
lect
09:55:00,703 INFO SettingsFactory:70 - Maximim outer join fetch depth: 2
09:55:00,703 INFO SettingsFactory:74 - Use outer join fetching: true
09:55:00,718 INFO DriverManagerConnectionProvider:42 - Using Hibernate built-in
connection pool (not for production use!)
09:55:00,718 INFO DriverManagerConnectionProvider:43 - Hibernate connection poo
l size: 20
09:55:00,750 INFO DriverManagerConnectionProvider:77 - using driver: org.gjt.mm
.mysql.Driver at URL: jdbc:mysql://localhost/sample
09:55:00,765 INFO DriverManagerConnectionProvider:78 - connection properties: {
user=root, password=12345678}
09:55:00,765 INFO TransactionFactoryFactory:31 - Transaction strategy: net.sf.h
ibernate.transaction.JDBCTransactionFactory
09:55:00,781 INFO TransactionManagerLookupFactory:33 - No TransactionManagerLoo
kup configured (in JTA environment, use of process level read-write cache is not
recommended)
09:55:03,234 INFO SettingsFactory:114 - Use scrollable result sets: true
09:55:03,234 INFO SettingsFactory:117 - Use JDBC3 getGeneratedKeys(): true
09:55:03,234 INFO SettingsFactory:120 - Optimize cache for minimal puts: false
09:55:03,250 INFO SettingsFactory:126 - echoing all SQL to stdout
09:55:03,250 INFO SettingsFactory:129 - Query language substitutions: {}
09:55:03,250 INFO SettingsFactory:140 - cache provider: net.sf.hibernate.cache.
EhCacheProvider
09:55:03,265 INFO Configuration:1121 - instantiating and configuring caches
09:55:03,828 INFO SessionFactoryImpl:119 - building session factory
09:55:05,718 INFO SessionFactoryObjectFactory:82 - Not binding factory to JNDI,
no JNDI name configured
Hibernate: insert into student (name) values Stupid

net.sf.hibernate.HibernateException: The database returned no natively generated
identity value
at net.sf.hibernate.persister.AbstractEntityPersister.getGeneratedIdenti
ty(AbstractEntityPersister.java:1229)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.jav
a:522)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.jav
a:428)
at net.sf.hibernate.impl.ScheduledIdentityInsertion.execute(ScheduledIde
ntityInsertion.java:29)
at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:941)
at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:866)
at net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(Session
Impl.java:784)
at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:747)
at Test.main(Test.java:25)
Press any key to continue...

hibernate 2.1.7 mysql 这个错误看不明白。。麻烦给看看是什么原因

2.Re:初学hibernate 遇到的错误 [Re: zhb]

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Posted by: zhb
Posted on: 2006-09-16 10:31

<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">
<hibernate-configuration>
<session-factory>

  <property name="hibernate.connection.url">jdbc:mysql://localhost/sample
</property>
  <property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
  
<property name="hibernate.connection.username">root</property>

<property name="hibernate.connection.password">12345678</property>
  <property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">True</property>
  
  <property name="hibernate.use_outer_join">True
  </property>
  
  <property name="hibernate.transaction.factory_class">
   net.sf.hibernate.transaction.JDBCTransactionFactory
  </property>

  
  <mapping resource="org/redsaga/quickstart/Student.hbm.xml"/>

</session-factory>
</hibernate-configuration>

3.Re:初学hibernate 遇到的错误 [Re: zhb]

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Posted by: zhb
Posted on: 2006-09-16 10:33

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

<hibernate-mapping>


<class
name="org.redsaga.quickstart.Student"
  table="student"
>

<id
name="id"
type="java.lang.Integer"
column="id"
unsaved-value="0"
>
<generator class="identity" />
</id>

<property
name="name"
type="java.lang.String"
column="name"
length="100"
/>



</class>
</hibernate-mapping>

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;
import org.dom4j.Attribute;
import org.apache.commons.logging.LogFactory;
import net.sf.cglib.core.*;

import org.redsaga.quickstart.Student;
public class Test
{
  public static void main(String[] args)
  {
    Session session;
   try{
      Configuration config = new Configuration();
      config.addClass(Student.class);


      SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
      session = sessionFactory.openSession();
      Transaction tx = session.beginTransaction();

      Student  student = new Student();
      student.setName("hello");
      session.flush();
      session.save(student);
      tx.commit();
     //Assert.assertEquals(student.getId().intValue()>0,true);

    }
    catch(HibernateException e){
      e.printStackTrace();
    }
  }
}