Hello everyone.
I have the following exception when mapping object - relational transaction in Hibernate configured with Spring:
This is the configuration file in XML:
This is the class PerformanceHibernateTest:
This is the class MyDataAccessObject:
This is the class Main:
Please help to improve it.
I have the following exception when mapping object - relational transaction in Hibernate configured with Spring:
Code:
INFO: Loaded JDBC driver: org.postgresql.Driver
Exception in thread "main" java.lang.NullPointerException
at mypackage.MyDataAccessObject.savePerformanceToDataBase(MyDataAccessObject.java:31)
at org.springframework.prospring.ticket.db.Main.main(Main.java:32)
Java Result: 1Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="myDataSource"
class="org.apache.commons.dbcp.DataSource">
<property name="driverClassName">
<value>org.postgresql.Driver</value>
</property>
<property name="url">
<value>jdbc:postgresql://localhost:5432/Entertainment</value>
</property>
<property name="username">
<value>shop</value>
</property>
<property name="password">
<value>shop123</value>
</property>
</bean>
<bean id="mySessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="annotatedClasses">
<list>
<value>org.springframework.prospring.ticket.domain.PerformanceHibernateTest</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.PostgreSQLDialect
</prop>
</props>
</property>
<property name="dataSource">
<ref bean="myDataSource" />
</property>
</bean>
<bean id="mytransactionmanager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref bean="mySessionFactory"/>
</property>
</bean>
<bean id="myDataaccessObject" class="mypackage.MyDataAccessObject">
<property name="sessionFactory">
<ref bean="mysessionFactory">
</property>
</bean>
</beans>Code:
package org.springframework.prospring.ticket.domain;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.*;
@Entity
public class PerformanceHibernateTest {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;
@Temporal(javax.persistence.TemporalType.DATE)
private Date dateAndTime = new Date();
private int priceStructureId =8;
private int showId =9;
public PerformanceHibernateTest() {
}
public PerformanceHibernateTest(int id, Date dateAndTime, int priceStructureId, int showId) {
this.id = id;
this.dateAndTime = dateAndTime;
this.priceStructureId = priceStructureId;
this.showId = showId;
}
}Code:
package mypackage;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.prospring.ticket.domain.PerformanceHibernateTest;
import org.springframework.transaction.annotation.Transactional;
public class MyDataAccessObject {
private HibernateTemplate ht;
public void setSessionFactory(SessionFactory sessionFactory) {
this.ht = new HibernateTemplate(sessionFactory);
}
@SuppressWarnings("unchecked")
@Transactional
public void savePerformanceToDataBase(PerformanceHibernateTest pht) {
ht.persist(pht);
}
}Code:
package org.springframework.prospring.ticket.db;
import java.util.Date;
import mypackage.MyDataAccessObject;
import org.springframework.prospring.ticket.domain.PerformanceHibernateTest;
public class Main {
public static void main(String[] args) {
Date date = new Date();
PerformanceHibernateTest pht = new PerformanceHibernateTest(6, date, 7, 8);
MyDataAccessObject mdao = new MyDataAccessObject();
mdao.savePerformanceToDataBase(pht);
}
}