品优购-秒杀下单
4.1 需求分析
商品详细页点击立即抢购实现秒杀下单，下单时扣减库存。当库存为 0 或不在活动期 范围内时无法秒杀。
4.2 后端代码
4.2.1 服务接口层
修改 pinyougou-seckill-interface 的 SeckillOrderService.java

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/** 
  * 提交订单 
  * @param seckillId 
  * @param userId 
  */ 
public void submitOrder(Long seckillId,String userId); 

服务实现层
Spring 配置文件配置 IdWorker
pinyougou-seckill-service 的 SeckillOrderServiceImpl.java 实现方法

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@Autowired 
 private RedisTemplate redisTemplate; 
  
 @Autowired 
 private IdWorker idWorker; 
   
 @Override 
 public void submitOrder(Long seckillId, String userId) { 
  //从缓存中查询秒杀商品   
  TbSeckillGoods seckillGoods =(TbSeckillGoods) 
redisTemplate.boundHashOps("seckillGoods").get(seckillId); 
  if(seckillGoods==null){ 
   throw new RuntimeException("商品不存在"); 
  } 
  if(seckillGoods.getStockCount()<=0){ 
   throw new RuntimeException("商品已抢购一空"); 
  }  
  //扣减（redis）库存   
  seckillGoods.setStockCount(seckillGoods.getStockCount()-1); 
redisTemplate.boundHashOps("seckillGoods").put(seckillId, seckillGoods);//放
回缓存 
  if(seckillGoods.getStockCount()==0){//如果已经被秒光 
   seckillGoodsMapper.updateByPrimaryKey(seckillGoods);//同步到数据库  
redisTemplate.boundHashOps("seckillGoods").delete(seckillId);   
  } 
  //保存（redis）订单 
  long orderId = idWorker.nextId(); 
  TbSeckillOrder seckillOrder=new TbSeckillOrder(); 
  seckillOrder.setId(orderId); 
  seckillOrder.setCreateTime(new Date()); 
  seckillOrder.setMoney(seckillGoods.getCostPrice());//秒杀价格 
  seckillOrder.setSeckillId(seckillId); 
  seckillOrder.setSellerId(seckillGoods.getSellerId()); 
seckillOrder.setUserId(userId);//设置用户 ID 
  seckillOrder.setStatus("0");//状态 
  redisTemplate.boundHashOps("seckillOrder").put(userId, seckillOrder); 
 } 

控制层
修改 pinyougou-seckill-web 的 SeckillOrderController.java

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@RequestMapping("/submitOrder") 
public Result submitOrder(Long seckillId){ 
  String userId = 
SecurityContextHolder.getContext().getAuthentication().getName(); 
  if("anonymousUser".equals(userId)){//如果未登录 
   return new Result(false, "用户未登录"); 
  } 
  try { 
   seckillOrderService.submitOrder(seckillId, userId); 
   return new Result(true, "提交成功"); 
  }catch (RuntimeException e) { 
   e.printStackTrace(); 
   return new Result(false, e.getMessage()); 
  } catch (Exception e) { 
   e.printStackTrace(); 
   return new Result(false, "提交失败"); 
  } 
} 

品优购-秒杀下单
4.1 需求分析
商品详细页点击立即抢购实现秒杀下单，下单时扣减库存。当库存为 0 或不在活动期 范围内时无法秒杀。
4.2 后端代码
4.2.1 服务接口层
修改 pinyougou-seckill-interface 的 SeckillOrderService.java

[AppleScript] 纯文本查看 复制代码

/** 
  * 提交订单 
  * @param seckillId 
  * @param userId 
  */ 
public void submitOrder(Long seckillId,String userId); 

服务实现层
Spring 配置文件配置 IdWorker
pinyougou-seckill-service 的 SeckillOrderServiceImpl.java 实现方法

[AppleScript] 纯文本查看 复制代码

@Autowired 
 private RedisTemplate redisTemplate; 
  
 @Autowired 
 private IdWorker idWorker; 
   
 @Override 
 public void submitOrder(Long seckillId, String userId) { 
  //从缓存中查询秒杀商品   
  TbSeckillGoods seckillGoods =(TbSeckillGoods) 
redisTemplate.boundHashOps("seckillGoods").get(seckillId); 
  if(seckillGoods==null){ 
   throw new RuntimeException("商品不存在"); 
  } 
  if(seckillGoods.getStockCount()<=0){ 
   throw new RuntimeException("商品已抢购一空"); 
  }  
  //扣减（redis）库存   
  seckillGoods.setStockCount(seckillGoods.getStockCount()-1); 
redisTemplate.boundHashOps("seckillGoods").put(seckillId, seckillGoods);//放
回缓存 
  if(seckillGoods.getStockCount()==0){//如果已经被秒光 
   seckillGoodsMapper.updateByPrimaryKey(seckillGoods);//同步到数据库  
redisTemplate.boundHashOps("seckillGoods").delete(seckillId);   
  } 
  //保存（redis）订单 
  long orderId = idWorker.nextId(); 
  TbSeckillOrder seckillOrder=new TbSeckillOrder(); 
  seckillOrder.setId(orderId); 
  seckillOrder.setCreateTime(new Date()); 
  seckillOrder.setMoney(seckillGoods.getCostPrice());//秒杀价格 
  seckillOrder.setSeckillId(seckillId); 
  seckillOrder.setSellerId(seckillGoods.getSellerId()); 
seckillOrder.setUserId(userId);//设置用户 ID 
  seckillOrder.setStatus("0");//状态 
  redisTemplate.boundHashOps("seckillOrder").put(userId, seckillOrder); 
 } 

控制层
修改 pinyougou-seckill-web 的 SeckillOrderController.java

[AppleScript] 纯文本查看 复制代码

@RequestMapping("/submitOrder") 
public Result submitOrder(Long seckillId){ 
  String userId = 
SecurityContextHolder.getContext().getAuthentication().getName(); 
  if("anonymousUser".equals(userId)){//如果未登录 
   return new Result(false, "用户未登录"); 
  } 
  try { 
   seckillOrderService.submitOrder(seckillId, userId); 
   return new Result(true, "提交成功"); 
  }catch (RuntimeException e) { 
   e.printStackTrace(); 
   return new Result(false, e.getMessage()); 
  } catch (Exception e) { 
   e.printStackTrace(); 
   return new Result(false, "提交失败"); 
  } 
}