CertificationPersistence.java 文件源码

public static Certifications getByName(String name) {
    if (name != null && !name.isEmpty()) {
        EntityManager em = EMFUtil.getEMFactory().createEntityManager();
        String query = "SELECT cert from Certifications cert where cert.certification = :name";

        try {
            TypedQuery<Certifications> q = em.createQuery(query, Certifications.class);
            q.setParameter("name", name);
            return q.getSingleResult();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            em.close();
        }
    }
    return null;
}