标签: 事务

Spring 事务管理

Spring 的事务管理把 JDBC/ORM 的「开启、提交、回滚、释放连接」封装成声明式能力：一个 @Transactional 注解，方法进出即自动完成事务边界。但要真正用好它，得理解它靠 AOP 代理实现——代理不生效，事务就不生效。

1. 声明式事务

@Service
public class OrderService {

    private final OrderMapper orderMapper;
    private final InventoryClient inventoryClient;

    public OrderService(OrderMapper orderMapper, InventoryClient inventoryClient) {
        this.orderMapper = orderMapper;
        this.inventoryClient = inventoryClient;
    }

    @Transactional(rollbackFor = Exception.class)
    public void createOrder(OrderCmd cmd) {
        orderMapper.insert(cmd.toOrder());
        inventoryClient.deduct(cmd.getItemId(), cmd.getQty());
    }
}

Gavin James2026/10/11大约 4 分钟