ConversationDataAccessObject.java 文件源码

public static boolean delete(int conversationID) {
    if (conversationID > 0) {
        EntityManager em = EMFUtil.getEMFactory().createEntityManager();
        Conversations conversation = em.find(Conversations.class, conversationID);
        if (conversation != null) {
            EntityTransaction trans = em.getTransaction();
            try {
                trans.begin();
                em.remove(conversation);
                trans.commit();
                return true;
            } catch (Exception e) {
                e.printStackTrace();
                trans.rollback();
            } finally {
                em.close();
            }
        }
    }
    return false;
}