用JUnit测试Spring管理Hibernate框架的一个例子

￡神魔★判官ぃ 2022-06-18 07:40 160阅读 0赞

(源代码：shTest[https://github.com/TerenceJIng/javaLearn][https_github.com_TerenceJIng_javaLearn])

将JUnit 与hibernate整合起来

![SouthEast][]

上述例子，分为三个包：

>  *  src:存放业务代码
>  *  test：存放测试代码
>  *  lib：引入Hiberante和Spring框架的jar包。

# JUnit应用于Spring测试 #

Spring核心配置文件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-3.0.xsd">
        <bean id="date"class="java.util.Date"/>
    </beans>

SpringTest.java：

import java.util.Date;
    import org.junit.BeforeClass;
    import org.junit.Test;
    importorg.springframework.context.ApplicationContext;
    importorg.springframework.context.support.ClassPathXmlApplicationContext;
     
    public class SpringTest {
           privatestatic ApplicationContext context = null; 
           /*
            * 加载Spring的核心配置文件
            */
           @BeforeClass
           publicstatic void setUpBeforeClass() throws Exception {
                  context= new ClassPathXmlApplicationContext("applicationContext.xml");
           }
           @Test
           publicvoid test() {
                  Datedate =  (Date)context.getBean("date");
                  System.out.println(date);
           }
    }

执行测试：加载进了配置文件中获取的时间

![SouthEast 1][]

# JUnit应用于Hibernate #

Hibernate核心配置文件hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
    <!DOCTYPE hibernate-configuration PUBLIC
              "-//Hibernate/HibernateConfiguration DTD 3.0//EN"
              "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
    
    <hibernate-configuration>
        <session-factory>
            <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
            <property name="connection.url">jdbc:mysql://127.0.0.1:3306/mytest</property>
            <property name="connection.username">root</property>
            <property name="connection.password">root</property>
            <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
            <property name="myeclipse.connection.profile">com.mysql.jdbc.Driver</property>
        </session-factory>
    </hibernate-configuration>

测试类HibernateTest.java

import org.hibernate.Session;
    import org.junit.Test;
    public class HibernateTest {@Test public void test() {
    		Session session = HibernateSessionFactory.getSession();
    		System.out.println(session);
    	}
    }

测试执行结果：

# Spring管理Hibernate #

给Spring核心配置文件applicationContext.xml 引入Hibernate配置文件信息：

>     <?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-3.0.xsd">
>     	<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>

SpringAndHibernate.java

>     import org.hibernate.impl.SessionFactoryImpl;
>     import org.junit.BeforeClass;
>     import org.junit.Test;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     public class SpringAndHibernate {
>     	private static ApplicationContext context;@BeforeClass public static void setUpBeforeClass() throws Exception {
>     		context = new ClassPathXmlApplicationContext("applicationContext.xml");
>     	}@Test public void test() {
>     		SessionFactoryImpl bean = (SessionFactoryImpl) context.getBean("sessionFactory");
>     		System.out.println(bean);
>     	}
>     }
> 
> 测试：

用Spring管理Hibernate需要引入持久化类包，还需要以下Hibernate会话工厂类：
    HibernateSessionFactory.java类

import org.hibernate.HibernateException;
    import org.hibernate.Session;
    import org.hibernate.cfg.Configuration;
    /** * Configures and provides access to Hibernate sessions, tied to the * current thread of execution. Follows the Thread Local Session * pattern, see {@link http://hibernate.org/42.html }. */
    public class HibernateSessionFactory {
    	/** * Location of hibernate.cfg.xml file. * Location should be on the classpath as Hibernate uses * #resourceAsStream style lookup for its configuration file. * The default classpath location of the hibernate config file is * in the default package. Use #setConfigFile() to update * the location of the configuration file for the current session. */
    	private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    	private static final ThreadLocal < Session > threadLocal = new ThreadLocal < Session > ();
    	private static Configuration configuration = new Configuration();
    	private static org.hibernate.SessionFactory sessionFactory;
    	private static String configFile = CONFIG_FILE_LOCATION;
    	static {
    		try {
    			configuration.configure(configFile);
    			sessionFactory = configuration.buildSessionFactory();
    		} catch(Exception e) {
    			System.err.println("%%%% Error Creating SessionFactory %%%%");
    			e.printStackTrace();
    		}
    	}
    	private HibernateSessionFactory() {}
    	/** * Returns the ThreadLocal Session instance. Lazy initialize * the <code>SessionFactory</code> if needed. * * @return Session * @throws HibernateException */
    	public static Session getSession() throws HibernateException {
    		Session session = (Session) threadLocal.get();
    		if (session == null || !session.isOpen()) {
    			if (sessionFactory == null) {
    				rebuildSessionFactory();
    			}
    			session = (sessionFactory != null) ? sessionFactory.openSession() : null;
    			threadLocal.set(session);
    		}
    		return session;
    	}
    	/** * Rebuild hibernate session factory * */
    	public static void rebuildSessionFactory() {
    		try {
    			configuration.configure(configFile);
    			sessionFactory = configuration.buildSessionFactory();
    		} catch(Exception e) {
    			System.err.println("%%%% Error Creating SessionFactory %%%%");
    			e.printStackTrace();
    		}
    	}
    	/** * Close the single hibernate session instance. * * @throws HibernateException */
    	public static void closeSession() throws HibernateException {
    		Session session = (Session) threadLocal.get();
    		threadLocal.set(null);
    		if (session != null) {
    			session.close();
    		}
    	}
    	/** * return session factory * */
    	public static org.hibernate.SessionFactory getSessionFactory() {
    		return sessionFactory;
    	}
    	/** * return session factory * * session factory will be rebuilded in the next call */
    	public static void setConfigFile(String configFile) {
    		HibernateSessionFactory.configFile = configFile;
    		sessionFactory = null;
    	}
    	/** * return hibernate configuration * */
    	public static Configuration getConfiguration() {
    		return configuration;
    	}
    }

`spring与hibernate的整合测试总结：``1.添加spring，hibernate，MySQL等jar包``2.添加spring配置文件，hibernate配置文件``3.@BeforeClass获得spring的配置文件ClassPathXmlApplicationContext("配置文件")``4.测试通过getBean获得spring管理的bean是否成功（Hibernate、Spring+Hibernate同理测试可得）`

[https_github.com_TerenceJIng_javaLearn]: https://github.com/TerenceJIng/javaLearn
[SouthEast]: /images/20220618/19535e1a9f4e4d0797f08e4f70481f15.png
[SouthEast 1]: /images/20220618/dd8091c79e264f7fa5dbc91bf08abc9b.png