使用 Spring+Hibernate 更新

Question

我想使用 Hibernate+ 执行事务Spring.I 想从 DB 检索数据并更新参数然后坚持 same.I 我是 hibernate 的新手有人可以评估代码并建议我实现 same.Here 的最佳方法是代码片段：

@Repository
public class WalletDaoImpl implements WalletDao {

    @Autowired
    private SessionFactory sessionFactory;


    @Override
    public boolean creditWallet(double amount, final String customerId) {
        Session session = this.sessionFactory.openSession();
        Transaction tx = session.beginTransaction();
        Criteria cr = session.createCriteria(Wallet.class);
        cr.add(Restrictions.eq("customerId", customerId));

        Wallet walletInfo = (Wallet) cr.uniqueResult();
        tx.commit();

        final double newbalaance = walletInfo.getAmount() + amount;
        walletInfo.setAmount(newbalaance);

        Transaction tx2 = session.beginTransaction();
        session.update(walletInfo);
        tx2.commit();
        session.close();
        return true;

    }
}

提前致谢。

Answer 1

最好的办法是 Spring 交易管理；您应该使用 spring 的 @Transactional 注释并配置 spring 以便启用事务注释

所以，回到你的代码...我会做这样的事情：

@Repository
public class WalletDaoImpl implements WalletDao {

    @Autowired
    private SessionFactory sessionFactory;

    @Override
    public boolean creditWallet(double amount, final String customerId) throws Exception
    {
        Session session = this.sessionFactory.getCurrentSession();
         Criteria cr = session.createCriteria(Wallet.class);
        cr.add(Restrictions.eq("customerId", customerId));

        Wallet walletInfo = (Wallet) cr.uniqueResult();
        final double newbalaance = walletInfo.getAmount() + amount;
        walletInfo.setAmount(newbalaance);
        session.update(walletInfo);
        return true;

    }
}

@Service
public class WalletServiceImpl implements WalletService
{
    @Autowired
    private WalletDao dao;
    @Override
    @Transactional
    public boolean updateWallet(double amount, final String customerId) throws Exception
    {
        return dao.creditWallet(amount, customerId);

    }
}

这里有更深入的解释：Spring transaction managment

使用 Spring+Hibernate 更新

Update using Spring+Hibernate

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