SpringBoot使用Redisson实现分布式锁（秒杀系统）

<dependency>
 <groupId>org.redisson</groupId>
 <artifactId>redisson-spring-boot-starter</artifactId>
 <version>3.10.6</version>
</dependency>

<dependency>
 <groupId>org.redisson</groupId>
 <artifactId>redisson</artifactId>
 <version>3.6.1</version>
</dependency>

<dependency>
 <groupId>io.netty</groupId>
 <artifactId>netty-all</artifactId>
 <version>4.1.25.Final</version>
</dependency>
 
<dependency>
 <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-core</artifactId>
 <version>2.9.0</version>
</dependency>
 
<dependency>
 <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-databind</artifactId>
 <version>2.9.0</version>
</dependency>

singleServerConfig:
 idleConnectionTimeout: 10000
 pingTimeout: 1000
 connectTimeout: 10000
 timeout: 3000
 retryAttempts: 3
 retryInterval: 1500
 reconnectionTimeout: 3000
 failedAttempts: 3
 password: null
 subscriptionsPerConnection: 5
 clientName: null
 address: "redis://127.0.0.1:6379"
 subscriptionConnectionMinimumIdleSize: 1
 subscriptionConnectionPoolSize: 50
 connectionMinimumIdleSize: 32
 connectionPoolSize: 64
 database: 0
 #在最新版本中dns的检查操作会直接报错 所以我直接注释掉了
 #dnsMonitoring: false
 dnsMonitoringInterval: 5000
threads: 0
nettyThreads: 0
codec: !<org.redisson.codec.JsonJacksonCodec> {}
transportMode : "NIO"

/**
* @Description //TODO
* @Date $ $
* @Author huangwb
**/
@Configuration
public class RedssonConfig {
 @Bean(destroyMethod="shutdown")
 public RedissonClient redisson() throws IOException {
  RedissonClient redisson = Redisson.create(
    Config.fromYAML(new ClassPathResource("redisson-single.yml").getInputStream()));
  return redisson;
 }
}

@Autowired
private RedissonClient redissonClient;
 
@Override
public boolean decrementProductStore(Long productId, Integer productQuantity) {
 String key = "dec_store_lock_" + productId;
 RLock lock = redissonClient.getLock(key);
 try {
  //加锁 操作很类似Java的ReentrantLock机制
  lock.lock();
  ProductInfo productInfo = productInfoMapper.selectByPrimaryKey(productId);
  //如果库存为空
  if (productInfo.getProductStock() == 0) {
   return false;
  }
  //简单减库存操作 没有重新写其他接口了
  productInfo.setProductStock(productInfo.getProductStock() - 1);
  productInfoMapper.updateByPrimaryKey(productInfo);
 } catch (Exception e) {
  System.out.println(e.getMessage());
 } finally {
  //解锁
  lock.unlock();
 }
 return true;
}

@GetMapping("test")
public String createOrderTest() {
 if (!productInfoService.decrementProductStore(1L, 1)) {
  return "库存不足";
 }
 OrderMaster orderMaster = new OrderMaster();
 //未支付
 orderMaster.setOrderStatus(0);
 //未支付
 orderMaster.setPayStatus(0);
 orderMaster.setBuyerName(name);
 orderMaster.setBuyerAddress("湖南长沙");
 orderMaster.setBuyerPhone("18692794847");
 orderMaster.setOrderAmount(BigDecimal.ZERO);
 orderMaster.setCreateTime(DateUtils.getCurrentDate());
 orderMaster.setOrderId(UUID.randomUUID().toString().replaceAll("-", ""));
 orderMasterService.insert(orderMaster);
 return "创建订单成功";
}