package cn.itcast.utils;java
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;.net
/**
* 保證整個工程裏以後惟一的一個工廠EntityManagerFactory
* @author xiaokaibo
*
*/
public class JPAUtils {get
//實體管理器工廠,等價於SessionFactory
private static final EntityManagerFactory emf;
static{
emf = Persistence.createEntityManagerFactory("myPersistUnit");
}
/**
* 獲取實體管理器的方法,EntityManager等價於Session
* @return
*/
public static EntityManager getEntityManager(){
return emf.createEntityManager();
}
}it