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我有一个带有几个方法的@Service 层类，其中有@Transactional(isolation = Isolation.READ_UNCOMMITTED) 注释查询和@Transactional 注释写入事务。有时事务上会出现死锁，我可以在 SQLServer Profiler 死锁分析 XML 中看到，查询具有 READ_COMMITED 隔离级别。如何更改事务的隔离级别设置？欢迎任何帮助。

有这样的存储库：

@Repository
public interface mStorageRepository extends AdBaseClientOrgRepository<mStorage, Long>  {
    @Modifying
    @Query("UPDATE mStorage s SET s.qtyonhand = s.qtyonhand + ?2, s.updated = current_timestamp WHERE s.id = ?1")
    void updateqtyBymStorageid(long id, BigDecimal movementqty);

    @Query("SELECT s FROM mStorage s WHERE s.locator.id = ?1 AND s.stockAlert = ?2 order by s.datelastinventory")
    Iterable<mStorage> getByLocatorAndStockAlert(long mLocatorId, String stockAlert);
.
.
.
}

有这样的日期服务层：

    @Service
    public class mStorageService extends AdBaseClientOrgService<mStorage, mStorageRepository> {
    
        @Autowired
        public mStorageService(Logger logger, TimeService timeService, MessageService messageService) {
            super(logger, timeService, messageService);
        }
    
        @Override
        @Autowired
        public void setRepo(mStorageRepository repo) {
            this.repo = repo;
        }
    
    
        @Transactional
        public void updateqtyBymStorageid(long id, BigDecimal movementqty) {
            logger.debug("start updateqtyBymStorageid : {} , {}",id,movementqty);
            repo.updateqtyBymStorageid(id, movementqty);
            logger.debug("end updateqtyBymStorageid : {} , {}",id,movementqty);
        }
    
    
        @Transactional(isolation = Isolation.READ_UNCOMMITTED)
        public Iterable<mStorage> getByLocatorAndStockAlert(long locatorId, StockAlert stockAlert) {
            Iterable<mStorage> ret = this.repo.getByLocatorAndStockAlert(locatorId, stockAlert.toString());
            getLazyProperties(ret);
            return ret;
        }
.
.
.

}

还有几个业务逻辑服务层实现：

@Service
public class BaseProductionPartsUsageService {

    @Autowired
    public BaseProductionPartsUsageService(final Logger logger) {
        this.logger = logger;
        logger.info("BaseProductionPartsUsageService initialized");
    }

    protected Logger logger;


    @Autowired
    public void setStorageService(mStorageService storageService) {
        this.storageService = storageService;
    }

    protected mStorageService storageService;

// calls several data service methods in method annotated with @Transactional
.
.
.
 }

有时我们会遇到死锁，当我们在 SQLServer 分析器中检查详细信息时，我们可以看到由 READ_UNCOMMITED 注释的查询方法在分析器 xml 中是 READ_COMMITED。

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