maven项目使用spring时出的错

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'itemCatController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.taotao.service.ItemCatService com.taotao.controller.ItemCatController.itemCatService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'itemCatService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: Failed to check the status of the service com.taotao.service.ItemCatService. No provider available for the service com.taotao.service.ItemCatService from the url zookeeper://47.100.54.177:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=taotao-manager-web&check=false&dubbo=2.5.3&interface=com.taotao.service.ItemCatService&methods=getItemCatList&pid=5536&revision=0.0.1-SNAPSHOT&side=consumer&timeout=300000×tamp=1534737176431 to the consumer 192.168.0.106 use dubbo version 2.5.3
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:160)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Error creating bean with name 'itemCatController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.taotao.service.ItemCatService com.taotao.controller.ItemCatController.itemCatService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'itemCatService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: Failed to check the status of the service com.taotao.service.ItemCatService.

大概说的是itemCatController无法自动注入依赖，因为创建ItemCatService时FactoryBean扔出异常。

但是明明刚才代码还能运行的，也是奇怪了。点击ItemCatService实现类时发现，项目上有s，但是类上面没有s，说明类没有交给spring管理。但是我们明明使用@Service注解了。仔细看一下，导入的包确实是org.springframework.stereotype.Service，并不是com.alibaba.dubbo.config.annotation.Service，所以导包没问题。然后尝试update maven project，然后类上面就出现s，然后项目就正常了。

总结：

检查对象有没有要给spring管理

1. 实现类忘记写@Service
2. @Service正确的包是org.springframework.stereotype.Service，不要导成com.alibaba.dubbo.config.annotation.Service
3. update maven project