fix - 事务&锁机制优化，防止重复扣费情况。

service/src/main/java/com/sv/service/api/OrderService.java

@@ -24,7 +24,11 @@ import org.apache.commons.lang3.time.DateFormatUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.TransactionDefinition;
+import org.springframework.transaction.TransactionStatus;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.DefaultTransactionDefinition;
 import org.springframework.web.bind.annotation.RequestBody;
 
 import javax.annotation.Resource;
@@ -69,6 +73,9 @@ public class OrderService extends BaseServiceImpl {
 	@Resource
 	private MemberKeyLock memberKeyLock;
 
+	@Resource
+	private PlatformTransactionManager transactionManager;
+
 	/**
 	 * 创建订单
 	 *
@@ -314,7 +321,14 @@ public class OrderService extends BaseServiceImpl {
 				return result;
 			}
 
-			Order order = new Order();
+			DefaultTransactionDefinition def = new DefaultTransactionDefinition();
+			def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
+			TransactionStatus txStatus = transactionManager.getTransaction(def);
+			Order order;
+			try {
+				order = orderMapper.findPendingBasketballOrder(memberId, venueId);
+				if (order == null) {
+					order = new Order();
 					order.setOrderSn(createSn());
 					order.setPayType(payTypeEnum.value);
 					order.setPrice(price);
@@ -325,6 +339,12 @@ public class OrderService extends BaseServiceImpl {
 					order.setParentOrderId(venueId);
 					order.setCreatedId(enterFlag);
 					orderMapper.insert(order);
+				}
+				transactionManager.commit(txStatus);
+			} catch (RuntimeException e) {
+				transactionManager.rollback(txStatus);
+				throw e;
+			}
 
 			if (EnterEnum.OUT.value == enterFlag) {
 				BarcodeOrderTime lastOrder = barcodeOrderTimeMapper.findLastOrder(memberId, venueId);