JAVA基础篇-抽象类

最新推荐文章于 2024-10-24 20:48:39 发布

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本文介绍了一个使用抽象类和具体类的Java示例，通过定义抽象类`AbstractTest`并由`MyTest`类继承来实现单元测试框架的基本设置流程。`AbstractTest`中定义了初始化和清理会话的方法，而`MyTest`则实现了具体的测试内容。

1.抽象类

package JavaStruct;

import junit.framework.TestCase;
import net.sf.hibernate.FlushMode;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate.SessionFactoryUtils;
import org.springframework.orm.hibernate.SessionHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

//抽象类，含抽象方法，继承一个类或实现一个接口
public abstract class AbstractTest extends TestCase{
	protected ApplicationContext context;

	protected void setUp() throws Exception {
        context = getContext();
        //Application.getInstance().setContainer(new SpringContainer(context));
        openSession();
        super.setUp();
    }

    protected abstract ApplicationContext getContext();

    private void openSession() {
        SessionFactory sessionFactory = (SessionFactory) context.getBean("sessionFactory");
        Session hibSession = SessionFactoryUtils.getSession(sessionFactory, true);
        hibSession.setFlushMode(FlushMode.NEVER);
        TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(hibSession));
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        closeSession();
    }

    private void closeSession() {
        SessionFactory sessionFactory = (SessionFactory) context.getBean("sessionFactory");
        SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager.unbindResource(sessionFactory);
        SessionFactoryUtils.closeSessionIfNecessary(sessionHolder.getSession(), sessionFactory);
    }
    
    protected void newSession() {
        closeSession();
        openSession();
    }   
		
	
}

具体类继承抽象类，写具体方法

package JavaStruct;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest extends AbstractTest{
	private ServiceA serviceA;

	@Override
	protected ApplicationContext getContext() {
		
		return new ClassPathXmlApplicationContext(new String[]{"application_context.xml,oracle.xml,aaa.xml"});
	}
    
	protected void setUp() throws Exception{
		super.setUp();
		serviceA=(ServiceA)context.getBean("ServiceA");
	}
	public void testab(){
		//testMethod
	}
}