Я знаю, что об этом спрашивали дюжину раз.Должно быть, у меня сегодня сумасшедший мозг, потому что я пытался изменить свой XML-файл сотнями способов, и я не могу понять это.
Стек ошибок при запуске драйвера:
16 [main] INFO org.hibernate.cfg.Environment - Hibernate 3.3.2.GA
31 [main] INFO org.hibernate.cfg.Environment - hibernate.properties not found
31 [main] INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
31 [main] INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
78 [main] INFO org.hibernate.cfg.Configuration - configuring from resource: test_hibernate/hibernate.cfg.xml
78 [main] INFO org.hibernate.cfg.Configuration - Configuration resource: test_hibernate/hibernate.cfg.xml
125 [main] INFO org.hibernate.cfg.Configuration - Reading mappings from resource : test_hibernate/contact.hbm.xml
Exception in thread "main" Could not parse mapping document from resource test_hibernate/contact.hbm.xml
java.lang.NullPointerException
at test_hibernate.MyExample.main(MyExample.java:29)
Вот код MySQL для создания таблицы:
create database HibernateTest;
drop table contact;
Create table CONTACT(
ID int(15),
FIRSTNAME varchar(50) ,
LASTNAME varchar(50),
EMAIL varchar(150));
describe contact;
Вот мой файл сопоставления:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="test_hibernate.Contact" table="CONTACT">
<id name="id" column="ID" >
<generator class="increment" />
</id>
<property name="firstName" column="FIRSTNAME" />
<property name="lastName" column="LASTNAME" />
<property name="email" column="EMAIL" />
</class>
</hibernate-mapping>
А вот мой конфигурационный файл:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernatetest</property>
<property name="hibernate.connection.username">###</property>
<property name="hibernate.connection.password">###</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Mapping files -->
<mapping resource="test_hibernate/contact.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Любая помощь приветствуется, спасибо !!
Некоторая дополнительная информация: Установочный пакет test_hibernate и вот мой файл персистентности:
package test_hibernate;
public class Contact {
private String firstName;
private String lastName;
private String email;
private long id;
public String getEmail() {
return email;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public void setEmail(String string) {
email = string;
}
public void setFirstName(String string) {
firstName = string;
}
public void setLastName(String string) {
lastName = string;
}
public long getId() {
return id;
}
public void setId(long l) {
id = l;
}
}
и вот мой драйвер:
package test_hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.Transaction;
public class MyExample {
public static void main(String[] args) {
Session session = null;
try{
// This step will read hibernate.cfg.xml and prepare hibernate for use
SessionFactory sessionFactory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();
session=sessionFactory.openSession();
Transaction tx = session.beginTransaction();
//Create new instance of Contact and set values in it by reading them from form object
System.out.println("Inserting Record");
Contact contact = new Contact();
contact.setId(3);
contact.setFirstName("Smitha");
contact.setLastName("Rao");
contact.setEmail("smithaxxx@yahoo.com");
session.save(contact);
tx.commit();
System.out.println("Done");
}catch(Exception e){
System.out.println(e.getMessage());
}finally{
// Actual contact insertion will happen at this step
session.flush();
session.close();
}
}
}