junit学习（九）——Hibernate的单元测试

1、在项目中添加Hibernate的Libraries：

在项目上右击---->Properties---->Java Build  Path---->Libraries选项卡---->Add Library---->MyEclipse Libraries---->Hibernate x.x Core Libraries。我这里添加的是3.0版本。

2、在src下新建Hibernate的配置文件：hibernate.cfg.xml，新建一个session-factory用于连接数据库。代码如下：

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>
	<session-factory>
		<property name="dialect">
			org.hibernate.dialect.SQLServerDialect
		</property>
		<property name="connection.url">
			jdbc:sqlserver://127.0.0.1:1433;databaseName=test
		</property>
		<property name="connection.username">sa</property>
		<property name="connection.password">sa</property>
		<property name="connection.driver_class">
			com.microsoft.sqlserver.jdbc.SQLServerDriver
		</property>
	</session-factory>
</hibernate-configuration>

3、 在test资源包中新建HibernateSessionFactory类，用于读取Hibernate的配置文件：

package com.wjl.junit;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;

public class HibernateSessionFactory {

    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() {
    }
	
    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;
    }

	public static void rebuildSessionFactory() {
		try {
			configuration.configure(configFile);
			sessionFactory = configuration.buildSessionFactory();
		} catch (Exception e) {
			System.err
					.println("%%%% Error Creating SessionFactory %%%%");
			e.printStackTrace();
		}
	}

    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

	public static org.hibernate.SessionFactory getSessionFactory() {
		return sessionFactory;
	}

	public static void setConfigFile(String configFile) {
		HibernateSessionFactory.configFile = configFile;
		sessionFactory = null;
	}

	public static Configuration getConfiguration() {
		return configuration;
	}
}

注：以上两个文件，在项目中添加Hibernate时会自动生成，可以先添加Hibernate，然后直接拷贝配置文件。

4、新建测试类进行测试：

package com.wjl.junit;

import org.hibernate.Session;
import org.junit.Test;
/**
 * Junit_demo_12
 * Hibernate的单元测试
 * **/
public class HibernateTest {
	@Test
	public void test(){
		Session session = HibernateSessionFactory.getSession();
		System.out.println(session);//结果：org.hibernate.impl.SessionImpl(......)，说明Hibernate已经添加到项目中
	}
}

说明Hibernate已经添加到项目中。