Hibernate 使用save方法保存

创建 HibernateSessionFactory.java

package cn.util;

import org.hibernate.HibernateException;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;


public class HibernateSessionFactory {

    
    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    //给线程绑定一个Session 比类级别更加安全
	private static final ThreadLocal threadLocal = new ThreadLocal();
    private  static Configuration configuration = new Configuration();    
    private static org.hibernate.SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

    //运行一次 先于类构造方法完成  内存寄存器位置
	static {
    	try {
			configuration.configure(configFile);
			sessionFactory = configuration.buildSessionFactory();
		} catch (Exception e) {
			System.err
					.println("%%%% Error Creating SessionFactory %%%%");
			e.printStackTrace();
		}
    }
    private HibernateSessionFactory() {
    }
	
	//获得连接
    
    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();
		}
	}

	//关闭资源
    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;
	}

}

 

测试文件

package cn.test;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;

import cn.entity.User;
import cn.util.HibernateSessionFactory;

public class SaveTest {
	// 使用save方法保存
	public static void main(String[] args) {
		Session session = HibernateSessionFactory.getSession();
		User user = new User("左阻", 25, 1.73);
		Transaction tx = null;
		try {
			tx = session.beginTransaction();
			session.save(user);
			tx.commit();// 隐式调用刷新方法
			System.out.println("保存成功");
		} catch (HibernateException e) {
			e.printStackTrace();
			tx.rollback();
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}
}

 

效果图：