junit学习（十）——Springpring与Hibernate整合的单元测试

1、在项目中添加Spring x.x Core Libraries和Hibernate x.x Core Libraries，方法与前两篇相同。

需要注意的是：Hibernate最好使用3.3及以上版本。

我本地测试时，Spring2.5版本，Hibernate3.0版本，整合测试时报错：

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)

原因是：Spring-3.0.5和Hibernate-3.0.5（或者更低）版本的不兼容造成的。Spring-3.0.5需要用到Hibernate中的org/hibernate/context/CurrentSessionContext这个类，但是Hibernate-3.0.5中未提供此类。

解决办法是：把Hibernate升级到3.3以上。

将Hibernate换成3.3之后，问题解决。

 

2、添加Spring x.x Persistence Core Libraries，方法同前两篇。

也有一点需要注意：在勾选Spring x.x Persistence Core Libraries时，Spring x.x AOP Libraries，也会被勾选而且没法去掉，所以这一步实际上添加了两个Libraries。

 

3、在Spring的配置文件applicationContext.xml中添加Hibernate的配置：

<?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管理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、添加单元测试类进行测试：

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
 * spring与Hibernate整合的单元测试
 * **/
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);//结果：org.hibernate.impl.SessionFactoryImpl@1e2befa，说明spring与Hibernate的整合成功
	}
}

说明spring与Hibernate的整合成功。