问题
I have two different applications one for Business and one for Rest. Both of them exist in one EAR. Rest is a war and business is a jar. I am using the business jar in Rest application.
In the business application i have annotated the Service Interface with @component annotation.
Business Module -- com.test.project.service -- package name BaseService.java -- Interface which i am trying to autowire in my Rest Controller
REST Module com.test.project.controller -- package name BaseServiceController -- Controller Class where i am trying to auto wire BaseService.java
dispatcher-servlet.xml
To register my business and controller classes available in "com.test.project" package , i am mentioning the XML configuration as BUT the container is not able to auto wire BaseService.java in BaseServiceController.java, i am getting BeanCreationException
However if i am mentioning my base package name as "com.test.project.service" , BaseService.java is being auto wired into BaseServiceController.java, but if am trying to hit an endpoint in controller i am getting 404 as the controller is not registered in the container
below is my dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.test.project" />
<mvc:annotation-driven/>
<context:annotation-config/>
</beans>
Service
public interface IBaseService {
public void postData(String request) throws CustomException;
}
Controller
@RestController
@RequestMapping("/baseRequest")
public class BaseServiceController{
@Autowired
private IBaseService baseService;
//private static final Logger log = LoggerFactory.getLogger(BaseServiceController.class);
@RequestMapping(value = "/testRequest", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON)
public String invokeInfo() throws CustomException{
return "Spring Test";
}
}
Below is the exception
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1218)
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:778)
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:666)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:632)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:680)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:551)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:492)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:161)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:342)
... 91 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
... 109 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1380)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1126)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1021)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545)
... 111 more
回答1:
Create a new Class as below
IBaseServiceImpl.java
@Service
public class IBaseServiceImpl implements IBaseService {
//Implement defined methods in interface IBaseService
}
来源：https://stackoverflow.com/questions/50467716/component-scan-not-working-as-expected