spring_HibernateTemplate(Hibernate模板)_模版设计模式

左手的ㄟ右手 2022-06-15 05:58 154阅读 0赞

Callback:回调/钩子函数

package com.bjsxt.dao.impl;
    
    import javax.annotation.Resource;
    
    import org.springframework.orm.hibernate3.HibernateTemplate;
    import org.springframework.stereotype.Component;
    
    import com.bjsxt.dao.UserDao;
    import com.bjsxt.model.User;
    
    @Component("userDaoImpl")
    public class UserDaoImpl implements UserDao {
    	private HibernateTemplate hibernateTemplate;
    
    	public HibernateTemplate getHibernateTemplate() {
    		return hibernateTemplate;
    	}
    
    	@Resource(name = "hibernateTemplate")
    	public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
    		this.hibernateTemplate = hibernateTemplate;
    	}
    
    	@Override
    	public void save(User user) {
    		hibernateTemplate.save(user);
    	}
    
    }

ps:

import org.hibernate.Session;
    
    public interface MyHibernateCallback {
    	public Object doInHibernate(Session session);
    }

import org.hibernate.Session;
    
    public class MyHibernateTemplate {
    	public void executekWriteOperationAllowed(MyHibernateCallback callback) {
    		Session session = null;
    		try {
    			session = getSession();
    			session.beginTransaction().begin();
    
    			callback.doInHibernate(session);
    
    			session.getTransaction().commit();
    		} catch (Exception e) {
    			session.getTransaction().rollback();
    			e.printStackTrace();
    		} finally {
    			if (session != null) {
    				session.clear();
    			}
    		}
    
    	}
    
    	private Session getSession() {
    		return null;
    	}
    
    	public void save(final Object o) {
    		new MyHibernateTemplate()
    				.executekWriteOperationAllowed(new MyHibernateCallback() {
    					@Override
    					public Object doInHibernate(Session session) {
    						return session.save(o);
    					}
    				});
    	}
    }