BaseDao.java 文件源码

/**
 * 根据某些属性获取对象L
 * @param name 属性名称
 * @param value 属性值
 * @param lockMode 对象锁类型
 * @return
 */
public T findOneByProperty(String name, Object value, LockModeType lockMode) {
    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery<T> query = cb.createQuery(entityClass);
    Root<T> root = query.from(entityClass);
    query.where(cb.equal(QueryFormHelper.getPath(root, name), value));
    TypedQuery<T> typedQuery = em.createQuery(query);
    typedQuery.setLockMode(lockMode);
    try {
        List<T> list = typedQuery.getResultList();
        if (list.isEmpty()) {
            return null;
        } else {
            return list.get(0);
        }
    } catch (NoResultException e) {
        return null;
    }
}