spring_HibernateTemplate(Hibernate模板)_模版设计模式

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);
          }
        });
  }
}