entityfactory.java

国内很牛的软件公司花费两年半开发的用EJB3开发的代码,采用STRUTS和EJB3,目前系统进行第二版.所以拿出来共享

package com.ufmobile.common;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

public class EntityFactory {

	private static EntityFactory ef;
	private EntityManager em;

	
	
	private EntityFactory() {
		super();
		EntityManagerFactory emf = javax.persistence.Persistence.createEntityManagerFactory("mstreetUnit1");
		em = emf.createEntityManager();

	}

	public EntityManager getEntityManager(Long sysid) {		
		return em;
	}
	public static EntityFactory getInstance(){
		if(ef == null){
			ef = new EntityFactory();
		}
		return ef;
	}
}