java - 在 Spring Boot 中使用 @autowire 注释抛出 'BeanCreationException'

Question

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'daaSController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.ca.mock.dass.storage.mockservice.StorageService com.ca.mock.daas.storage.controller.DaaSController.storageService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.ca.mock.dass.storage.mockservice.StorageService] 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), @org.springframework.beans.factory.annotation.Qualifier(value=storageService)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:301)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1186)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:706)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
at com.ca.mock.daas.storage.controller.Application.main(Application.java:15)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.ca.mock.dass.storage.mockservice.StorageService com.ca.mock.daas.storage.controller.DaaSController.storageService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.ca.mock.dass.storage.mockservice.StorageService] 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), @org.springframework.beans.factory.annotation.Qualifier(value=storageService)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:522)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:298)
... 16 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.ca.mock.dass.storage.mockservice.StorageService] 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), @org.springframework.beans.factory.annotation.Qualifier(value=storageService)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1118)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:967)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:862)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:494)
... 18 common frames omitted

与此错误相关的代码:

Application.java

package com.ca.mock.daas.storage.controller;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ca.mock.dass.storage.mockservice.StorageServiceMockImpl;

@ComponentScan
@EnableAutoConfiguration
public class Application {
   public static void main(final String[] args) {
        SpringApplication.run(Application.class, args);
   }
}

DaaSController.java

package com.ca.mock.daas.storage.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.ca.mock.dass.storage.mockservice.StorageService;


@RestController
public class DaaSController {

    private static final String V1_DAAS = "/v1/daas";
   private static final String APPLICATION_JSON_CHARSET_UTF_8 =   "application/json; charset=utf-8";



  @Autowired
  @Qualifier("storageService")
  StorageService storageService;


  @RequestMapping(value = V1_DAAS, produces = APPLICATION_JSON_CHARSET_UTF_8)
  public String cecs() {
        return storageService.cecs();
  }
}

StorageService.java

package com.ca.mock.dass.storage.mockservice;


public interface StorageService {


    String cecs();

}

StorageServiceImpl.java

package com.ca.mock.dass.storage.mockservice;


public class StorageServiceMockImpl implements StorageService {


    @Override
    public String cecs() {
        return DassStorageUtil.mockDasdWithMetrics("Cecs");
    }

DassStorageUtil 具有从文件读取并返回字符串的代码。

application-context.xml

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:p="http://www.springframework.org/schema/p"
   xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
   xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
   xmlns:task="http://www.springframework.org/schema/task"
   xsi:schemaLocation="http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
     http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context-3.2.xsd
       http://www.springframework.org/schema/jee 
       http://www.springframework.org/schema/jee/spring-jee-3.2.xsd 
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.2.xsd 
       http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-3.2.xsd">

       <context:component-scan base-package="com.ca.mock.daas.storage.controller"/>
       <context:annotation-config />
       <bean id="daaSController" class="com.ca.mock.daas.storage.controller.DaaSController"/>
       <bean id="storageService" class="com.ca.mock.dass.storage.mockservice.StorageServiceMockImpl"/>

</beans> 

有人可以帮我解决这个错误吗？

Answer 1

如果您打算使用 XML 配置，则需要导入该资源

@ComponentScan
@EnableAutoConfiguration
@ImportResource("application-context.xml")
public class Application {
   public static void main(final String[] args) {
        SpringApplication.run(Application.class, args);
   }
}