如何调用hibernate.cfg.xml 文件？

Question

你好朋友，当我调用 SessionFactory sessionFactory =new Configuration().configure().buildSessionFactory(); 时，我用 hibernate 应用程序创建了 struts； 会话 =sessionFactory.openSession(); 此代码生成错误请帮助我示例代码在这里 这是我的 hibernate.cfg.xml 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.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/logintest</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">xxxx</property>
<property name="connection.pool_size">1</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="current_session_context_class">thread</property>
<property name="cache.provider_class">
        org.hibernate.cache.NoCacheProvider
    </property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<mapping resource="hibernate.hbm.xml"/>

我的映射文件在这里

   <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <hibernate-mapping>
    <class name="net.model.Contact" table="contacts">
   <id name="id" type="int" column="id" >
    <generator class="increment"></generator>
</id>   
<property name="firstName" column="firstname"></property>
<property name="lastName" column="lastname"></property>
 <property name="cellNo" column="cell_no"></property>
<property name="emailId" column="email_id"></property>
 <property name="birthDate" column="birthdate"/>
<property name="website" column="website"/>
  </class>
   </hibernate-mapping>

主类来了

        public class Testmain {
       public static void main(String args[])
{
    Session session=null;
    try
    {
   SessionFactory sessionFactory =new Configuration().configure().buildSessionFactory();
        session =sessionFactory.openSession();

    Contact contact=new Contact();
   contact.setFirstName("mohan");
  contact.setLastName("raddy");
  contact.setEmailId("mm@gmail.com");
    contact.setCellNo("4664564564");
   contact.setWebsite("www.stackoverflow.com");
        session.save(contact);
       session.beginTransaction().commit();
      System.out.println("done");


    }catch(Exception e)
    {
    System.out.println(e);
    }




    session.beginTransaction();
    List<Contact> contacts = null;
    try {

        contacts = (List<Contact>)session.createQuery("from Contact").list();

    } catch (HibernateException e) {
        e.printStackTrace();
        session.getTransaction().rollback();
    }
    session.getTransaction().commit();


    for (Contact contact : contacts) {
        System.out.println(contact.getFirstName());
      System.out.println(contact.getLastName());
        System.out.println(contact.getEmailId());
          System.out.println(contact.getCellNo());
            System.out.println(contact.getWebsite());
    }   
   }}

在我运行主类时显示以下错误

线程“main”中的异常 java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.(Z)V 在 net.sf.cglib.core.DebuggingClassWriter.(DebuggingClassWriter.java:47) 在 net.sf.cglib.core.DefaultGeneratorStrategy.getClassWriter(DefaultGeneratorStrategy.java:30) 在 net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:24) 在 net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216) 在 net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145) 在 net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117) 在 net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108) 在 net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104) 在 net.sf.cglib.proxy.Enhancer.(Enhancer.java:69) 在 org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:117) 在 org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43) 在 org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162) 在 org.hibernate.tuple.entity.AbstractEntityTuplizer.(AbstractEntityTuplizer.java:135) 在 org.hibernate.tuple.entity.PojoEntityTuplizer.(PojoEntityTuplizer.java:55) 在 org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.(EntityEntityModeToTuplizerMapping.java:56) 在 org.hibernate.tuple.entity.EntityMetamodel.(EntityMetamodel.java:295) 在 org.hibernate.persister.entity.AbstractEntityPersister.(AbstractEntityPersister.java:434) 在 org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:109) 在 org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55) 在 org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:226) 在 org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1294） 在 net.model.Testmain.main(Testmain.java:25) Java 结果：1

Answer 1

查看this answer，这表明您可能选择了错误版本的 asm.jar 您应该检查您的类路径并确保您没有安装多个版本。