禁止显示错误消息，找不到要查询的实体

Question

我使用以下代码获取单行结果：

@Override
    public PaymentTransactions transactionByUnique_Id(String unique_id) throws Exception {

        String hql = "select e from " + PaymentTransactions.class.getName() + " e where e.unique_id = :unique_id";
        Query query = entityManager.createQuery(hql).setParameter("unique_id", unique_id);
        PaymentTransactions paymentTransaction = (PaymentTransactions) query.getSingleResult();
        return paymentTransaction;
    }

但是当我没有匹配的行时，出现异常：

14:25:41,736 INFO  [stdout] (default task-1) javax.persistence.NoResultException: No entity found for query

如何抑制该异常并仅继续执行代码？

Answer 1

只需抛出并捕获javax.persistence.NoResultException异常并继续执行代码即可。

可能的How to continue program execution even after throwing exception?副本

Answer 2

只需更新日志记录方式：

    log4j.logger.javax.persistence=WARN