JPA 使用EntityManager

@Service
public class MyJpaService {

    @PersistenceContext
    EntityManager entityManager;

    /**
     * 方法如下
     * @param
     */
    public void continuousFailed() {

        // 獲取當天0點時間
        String startTime = DateUtil.getCurrDate();

        // 統計當天魔盒挖礦失敗次數
        String sql = "select deviceid,count(id) as total from error_log where type=1 and create_time<'"+startTime+"' group by deviceid";
        Query query = entityManager.createNativeQuery(sql);
        List rows = query.getResultList();
        for (Object row : rows) {
            Object[] cells = (Object[]) row;
            System.out.println(cells[0]);
            System.out.println(cells[1]);
        }
    }
}