问题
I need to create a simple REST-service with some fields I want to export from applicatonContext.xml file, but I've got
Stack-Trace
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 's3RestController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.lang.String com.emc.sk.data_mgmt_central.server.S3RestController.path; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [java.lang.String] 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=path)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
at com.emc.sk.data_mgmt_central.main.Main.main(Main.java:39)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.lang.String com.emc.sk.data_mgmt_central.server.S3RestController.path; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [java.lang.String] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=path)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:555)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
... 16 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [java.lang.String] 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=path)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1261)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1009)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:904)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:527)
... 18 common frames omitted
I run application with
Main class
@ComponentScan("com.emc.sk.data_mgmt_central.server")
@EnableAutoConfiguration
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}
And here is my
RestController
@RestController
@ContextConfiguration("/FileStorageContext.xml")
public class S3RestController {
@Autowired
private String path;
@RequestMapping("/getBucket")
public Bucket getBucket(@RequestParam(value="name", defaultValue="world") String name) {
return new Bucket(name);
}
}
My applicationContext is called FileStorageContext and stored in src/main/recourses (I've got a maven project)
FileStorageContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean name = "path" class="java.lang.String">
<constructor-arg type="java.lang.String" value="#{ systemProperties['java.io.tmpdir'] }bucketDir" />
</bean>
@Autowired works properly in my tests, but here this error occurs. I am new in Spring, maybe this construction is not correct at all. Thanks.
回答1:
Add @PropertySource("classpath:/your/properties/path/applicatio.properties")
to your controller and add @Value tag to path instead of @Autowired.
@Value("${java.io.tmpdir}")
private String path;
回答2:
I had to put @ImportResource("classpath:/FileStorageContext.xml") before my Main class, the problem was that this file wasn't seen.
回答3:
This line causes your exception:
@Autowired
private String path;
Autowiring works only on Spring managed beans and String should not be considered as one (IMO).
You may use @Value annotation if you want to get the value of path from your context. Or if you want to use as is, you can try @Qualifier("path") annotation along with @Autowired.
来源：https://stackoverflow.com/questions/28024869/autowiring-not-working-with-restcontroller