StackOverflow 社区您好，
我在 Spring Boot 应用程序的
NullPointerExceptionShopPromotionScheduler我对在代码中实现调度程序还比较陌生，并且遇到了无法诊断的问题。具体来说，我收到 NullPointerException，但我不确定它的来源。
以下是相关代码片段：
@Component
public class ShopPromotionScheduler {
@Resource
private IShopPromotionService shopPromotionService;
@Resource
private IShopItemBossBusinessService shopItemBossBusinessService;
@Resource
private IShopAutoSaleBossBusinessService shopAutoSaleBossBusinessService;
private Logger bizLogger = LoggerFactory.getLogger(Constants.BIZ_LOGGER);
@PostConstruct
public void init(){
startScheduler();
}
@Scheduled(cron = "0 0/1 * * * ?")
public void checkAndUpdateShopPromo() {
ShopPromotionQuery param = new ShopPromotionQuery();
param.setStatus(1);
List<ShopPromotionVo> shopPromotionList = shopPromotionService.getShopPromotionList(param).getModel();
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromotionList:{}", JSON.toJSONString(shopPromotionList));
shopPromotionList.forEach(shopPromo -> {
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromo:{}", JSON.toJSONString(shopPromo));
if (checkPastTime(shopPromo.getEndTime())){
shopPromo.getShopPromotionItemVoList().forEach(itemPromo -> {
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler itemPromo:{}", JSON.toJSONString(itemPromo));
ShopItemQuery shopItemQuery = new ShopItemQuery();
shopItemQuery.setEntityId(itemPromo.getEntityId());
shopItemQuery.setId(itemPromo.getItemId());
ShopItemDetailsVo shopItemDetailsVo = new ShopItemDetailsVo();
try {
shopItemDetailsVo = shopItemBossBusinessService.getShopItemDetails(shopItemQuery).getModel();
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopItemDetailsVo:{}", JSON.toJSONString(shopItemDetailsVo));
if (shopItemDetailsVo == null)
throw new RuntimeException();
} catch (Exception e) {
throw new RuntimeException(e);
}
ShopItemSetParam shopItemSetParam = itemSetParam(shopItemDetailsVo);
shopItemSetParam.setIsPromo(0);
ShopPromotionQuery shopPromotionParam = new ShopPromotionQuery();
shopPromotionParam.setId(itemPromo.getShopPromotionId());
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromotionParam:{}", JSON.toJSONString(shopPromotionParam));
List<ShopPromotionVo> shopPromotion = shopPromotionService.getShopPromotionList(shopPromotionParam).getModel();
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromotion:{}", JSON.toJSONString(shopPromotion));
boolean isUpdate = true;
for (ShopPromotionVo shopPromotionVo : shopPromotion) {
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromotionVo:{}", JSON.toJSONString(shopPromotionVo));
if (!(Objects.equals(shopPromotionVo.getId(), itemPromo.getShopPromotionId()))) {
if (shopPromotionVo.getStatus() == 1){
isUpdate = false;
}
}
}
if (isUpdate) {
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler isUpdate:{}", JSON.toJSONString(isUpdate));
Result<String> updateResult = shopItemBossBusinessService.updateShopItem(shopItemSetParam);
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler updateResult:{}", JSON.toJSONString(updateResult));
}
});
ShopPromotionParam shopPromotionParam = new ShopPromotionParam();
shopPromotionParam.setEntityId(shopPromotionParam.getEntityId());
shopPromotionParam.setId(shopPromotionParam.getId());
shopPromotionParam.setStatus(2);
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler shopPromotionParam:{}", JSON.toJSONString(shopPromotionParam));
Result<Integer> result = shopPromotionService.updateShopPromotion(shopPromotionParam);
bizLogger.info("checkAndUpdateShopPromo shopPromoScheduler result:{}", JSON.toJSONString(result));
};
});
}
private void startScheduler(){
checkAndUpdateShopPromo();
}
private boolean checkPastTime(Long timestamp){
Duration duration = Duration.between(Instant.now(), Instant.ofEpochMilli(timestamp));
return duration.isNegative() || duration.isZero();
}
private ShopItemSetParam itemSetParam(ShopItemDetailsVo shopItemDetailsVo) throws Exception {
ShopAutoOnOffSaleQuery shopAutoOnOffSaleQuery = new ShopAutoOnOffSaleQuery();
shopAutoOnOffSaleQuery.setEntityId(shopItemDetailsVo.getEntityId());
shopAutoOnOffSaleQuery.setItemId(shopItemDetailsVo.getId());
ShopItemSetParam shopItemSetParam = new ShopItemSetParam();
ShopAutoOnOffSaleVo shopAutoOnOffSaleVo = new ShopAutoOnOffSaleVo();
try {
shopAutoSaleBossBusinessService.getShopAutoOnOffSale(shopAutoOnOffSaleQuery).getModel();
} catch (Exception e){
throw new Exception();
}
ShopAutoOnOffSaleParam shopAutoOnOffSaleParam = new ShopAutoOnOffSaleParam();
shopAutoOnOffSaleParam.setId(shopAutoOnOffSaleVo.getId());
shopAutoOnOffSaleParam.setEntityId(shopAutoOnOffSaleVo.getEntityId());
shopAutoOnOffSaleParam.setIsAutoSale(shopAutoOnOffSaleVo.getIsAutoSale());
shopAutoOnOffSaleParam.setIsWeekday(shopAutoOnOffSaleVo.getIsWeekday());
shopAutoOnOffSaleParam.setItemId(shopAutoOnOffSaleVo.getItemId());
shopItemSetParam.setId(shopItemDetailsVo.getId());
shopItemSetParam.setOpUserId(shopItemDetailsVo.getOpUserId());
shopItemSetParam.setEntityId(shopItemDetailsVo.getEntityId());
shopItemSetParam.setShopAutoOnOffSaleParamList(shopAutoOnOffSaleParam);
shopItemSetParam.setItemType(shopItemDetailsVo.getItemType());
shopItemSetParam.setSubType(shopItemDetailsVo.getSubType());
shopItemSetParam.setCategoryId(shopItemDetailsVo.getCategoryId());
shopItemSetParam.setItemName(shopItemDetailsVo.getItemName());
shopItemSetParam.setItemSubName(shopItemDetailsVo.getItemSubName());
shopItemSetParam.setItemCode(shopItemDetailsVo.getItemCode());
shopItemSetParam.setStartNum(shopItemDetailsVo.getStartNum());
shopItemSetParam.setIsShelves(shopItemDetailsVo.getIsShelves());
shopItemSetParam.setIsTakeout(shopItemDetailsVo.getIsTakeout());
shopItemSetParam.setIsDiscount(shopItemDetailsVo.getIsDiscount());
shopItemSetParam.setIsRecommend(shopItemDetailsVo.getIsRecommend());
shopItemSetParam.setIsSku(shopItemDetailsVo.getIsSku());
shopItemSetParam.setDetails(shopItemDetailsVo.getDetails());
shopItemSetParam.setDualUnit(shopItemDetailsVo.getDualUnit());
shopItemSetParam.setBarCode(shopItemDetailsVo.getBarCode());
shopItemSetParam.setSortCode(shopItemDetailsVo.getSortCode());
shopItemSetParam.setMemo(shopItemDetailsVo.getMemo());
return shopItemSetParam;
}
}
这是日志错误；
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2024-04-01 17:47:50.361 ERROR o.s.boot.SpringApplication.reportFailure:771 Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shopPromotionScheduler': Invocation of init method failed; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:137)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:407)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1623)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at com.platform.merchant.StartSpringBootApplication.main(StartSpringBootApplication.java:34)
Caused by: java.lang.NullPointerException: null
at com.platform.merchant.component.ShopPromotionScheduler.itemSetParam(ShopPromotionScheduler.java:122)
at com.platform.merchant.component.ShopPromotionScheduler.lambda$null$0(ShopPromotionScheduler.java:72)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at com.platform.merchant.component.ShopPromotionScheduler.lambda$checkAndUpdateShopPromo$1(ShopPromotionScheduler.java:58)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at com.platform.merchant.component.ShopPromotionScheduler.checkAndUpdateShopPromo(ShopPromotionScheduler.java:55)
at com.platform.merchant.component.ShopPromotionScheduler.startScheduler(ShopPromotionScheduler.java:107)
at com.platform.merchant.component.ShopPromotionScheduler.init(ShopPromotionScheduler.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134)
我正在尝试实现一种使用调度程序创建代码的方法。然而，当我实现它时，出现了这样的错误。我不太确定我哪里出了问题，因为我尝试了几种不同的调度程序方法，但没有一个起作用
PS：已经解决了，忘了加上@EnableScheduling 哈哈
我不认为你的问题与 Spring 调度程序有关。堆栈跟踪表明访问 ArrayList 元素时出现问题。
Caused by: java.lang.NullPointerException: null
at com.platform.merchant.component.ShopPromotionScheduler.itemSetParam(ShopPromotionScheduler.java:122)
at com.platform.merchant.component.ShopPromotionScheduler.lambda$null$0(ShopPromotionScheduler.java:72)
at java.util.ArrayList.forEach(ArrayList.java:1259)
这可能是由于 ShopPromotionScheduler 类中的 checkAndUpdateShopPromo 方法中的 forEach 循环中访问空对象引起的。您可以检查 shopPromotionService 是否返回一个初始化的对象。
List<ShopPromotionVo> shopPromotionList = shopPromotionService.getShopPromotionList(param).getModel();