JPA 联结主键(多主键)映射

JPA 联合主键(多主键)映射

package junit.test;import javax.persistence.EntityManager;import javax.persistence.EntityManagerFactory;import javax.persistence.Persistence;import org.junit.Test;import com.jvwl.model.AirLine;public class JPATest {@Test public void test(){EntityManagerFactory factory = Persistence.createEntityManagerFactory("jvwl");EntityManager em =factory.createEntityManager();em.getTransaction().begin();em.persist(new AirLine("PEK", "SHA", "北京飞上海"));em.getTransaction().commit();em.close();factory.close();}}

?