junit learning (10) - unit testing of Springpring and Hibernate integration

1. Add Spring xx Core Libraries and Hibernate xx Core Libraries to the project , the method is the same as the previous two.

It should be noted that: Hibernate is best to use version 3.3 and above.

When I tested locally, Spring 2.5 and Hibernate 3.0, the integration test reported an error:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/context/CurrentSessionContext
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:423)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
	at com.wjl.junit.SpringAndHibernateTest.setUpBeforeClass(SpringAndHibernateTest.java:18)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

The reason is: Spring-3.0.5 and Hibernate-3.0.5 (or lower) versions are incompatible. Spring-3.0.5 needs to use the org/hibernate/context/CurrentSessionContext class in Hibernate, but this class is not provided in Hibernate-3.0.5.

The solution is: upgrade Hibernate to 3.3 or higher.

After changing Hibernate to 3.3, the problem is solved.

 

2. Add Spring xx Persistence Core Libraries , the method is the same as the previous two.

There is also one thing to note: when Spring xx Persistence Core Libraries is checked, Spring xx AOP Libraries will also be checked and cannot be removed, so this step actually adds two Libraries .

 

3. Add the Hibernate configuration to the Spring configuration file applicationContext.xml :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	
	<!-- spring manages Hibernate -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="configLocation" value="classpath:hibernate.cfg.xml" />
	</bean>
	<bean id="date" class="java.util.Date"/>
</beans>

4. Add a unit test class for testing :

package com.wjl.junit;


import org.hibernate.impl.SessionFactoryImpl;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * Junit_demo_13
 * Unit testing of spring and Hibernate integration
 * **/
public class SpringAndHibernateTest {

	private static ApplicationContext context = null;
	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
		context = new ClassPathXmlApplicationContext("applicationContext.xml");
	}
	
	@Test
	public void test(){
		SessionFactoryImpl session = (SessionFactoryImpl)context.getBean("sessionFactory");
		System.out.println(session);//Result: org.hibernate.impl.SessionFactoryImpl@1e2befa, indicating successful integration of spring and Hibernate
	}
}

It shows that the integration of spring and Hibernate is successful.