ConversationMessageDataAccessObject.java 文件源码

public static ConversationMessages merge (ConversationMessages message) {
    if (message != null) {
        EntityManager em = EMFUtil.getEMFactory().createEntityManager();
        EntityTransaction trans = em.getTransaction();
        try {
            trans.begin();
            message = em.merge(message);
            trans.commit();
            return message;
        } catch (Exception e) {
            e.printStackTrace();
            trans.rollback();
        } finally {
            em.close();
        }
    }
    return null;
}