Java 什么';BeanFactoryAnnotationUtils的用法有何错误?
我正在尝试对该方法进行简单调用 BeanFactoryAnnotationUtils.qualifiedBeanOfType 下面是项目的pom.xml:Java 什么';BeanFactoryAnnotationUtils的用法有何错误?,java,spring,spring-annotations,Java,Spring,Spring Annotations,我正在尝试对该方法进行简单调用 BeanFactoryAnnotationUtils.qualifiedBeanOfType 下面是项目的pom.xml: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>beanfactoryannotationutils.sample</groupId>
<artifactId>BeanFactoryAnnotationUtilsProblem</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.1.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<!-- Spring boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
两个beanQualifiedA.java
public interface QualifiedInterface {
}
@Component
@Qualifier("QualifierA")
public class QualifiedA implements QualifiedInterface {
@Override
public String toString() {
return "QualifiedA";
}
}
和QualifiedB.java:
@Component
@Qualifier("QualifierB")
public class QualifiedB implements QualifiedInterface {
@Override
public String toString() {
return "QualifiedB";
}
}
在同一个包和应用程序中,现在运行它:
2015-12-24 15:08:34.468 INFO 9524 --- [ main] l.p.e.b.Application : Starting Application on DTBE-DEV4 with PID 9524 (D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem\target\classes started by eguenichon in D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem)
2015-12-24 15:08:34.478 INFO 9524 --- [ main] l.p.e.b.Application : No profiles are active
2015-12-24 15:08:34.618 INFO 9524 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@11e18e8c: startup date [Thu Dec 24 15:08:34 CET 2015]; root of context hierarchy
2015-12-24 15:08:37.516 INFO 9524 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-12-24 15:08:37.524 INFO 9524 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2015-12-24 15:08:37.672 INFO 9524 --- [ main] l.p.e.b.Application : Started Application in 3.715 seconds (JVM running for 4.355)
Existing qualified beans ...
QualifiedA
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierA)
QualifiedB
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierB)
Existing qualified beans from context ...
QualifiedA
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierA)
QualifiedB
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierB)
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'QualifierA' is defined: No matching QualifiedInterface bean found for qualifier 'QualifierA' - neither qualifier match nor bean name match!
at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:100)
at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:56)
at beanfactoryannotation.sample.beanfactoryannotationutilsproblem.Application.main(Application.java:45)
2015-12-24 15:08:37.684 INFO 9524 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@11e18e8c: startup date [Thu Dec 24 15:08:34 CET 2015]; root of context hierarchy
2015-12-24 15:08:37.686 INFO 9524 --- [ Thread-1] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2015-12-24 15:08:37.691 INFO 9524 --- [ Thread-1] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
BeanFactoryAnnotationUtils.qualifiedBeanOfType似乎不起作用,因为上下文中存在合格的bean,但无法检索。你知道这里有什么问题吗
谢谢 在查看BeanFactoryAnnotationUtils.qualifiedBeanOfType(…)方法背后的代码时,我注意到该限定符是从AbstractBeanDefinition对象中检查出来的。当我在我们的示例中转储这个对象时,我可以注意到“限定符”映射是空的 Spring用带注释的限定符加载bean定义的方式看起来像一个bug 已经有一个类似的开放问题:
我想您可以专门打开另一个测试用例。由于BeanFactoryAnnotationUtils类的默认规范,在Spring4.3之前没有提供此功能
请参阅:可能是打字错误<代码>“QualifierA”vs
“QualifiedA”
您是对的,但在重写案例时这是一个错误,最初我有一个枚举。我把问题改成了QualifiedA。谢谢!
2015-12-24 15:08:34.468 INFO 9524 --- [ main] l.p.e.b.Application : Starting Application on DTBE-DEV4 with PID 9524 (D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem\target\classes started by eguenichon in D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem)
2015-12-24 15:08:34.478 INFO 9524 --- [ main] l.p.e.b.Application : No profiles are active
2015-12-24 15:08:34.618 INFO 9524 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@11e18e8c: startup date [Thu Dec 24 15:08:34 CET 2015]; root of context hierarchy
2015-12-24 15:08:37.516 INFO 9524 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-12-24 15:08:37.524 INFO 9524 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2015-12-24 15:08:37.672 INFO 9524 --- [ main] l.p.e.b.Application : Started Application in 3.715 seconds (JVM running for 4.355)
Existing qualified beans ...
QualifiedA
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierA)
QualifiedB
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierB)
Existing qualified beans from context ...
QualifiedA
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierA)
QualifiedB
- @org.springframework.stereotype.Component(value=)
- @org.springframework.beans.factory.annotation.Qualifier(value=QualifierB)
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'QualifierA' is defined: No matching QualifiedInterface bean found for qualifier 'QualifierA' - neither qualifier match nor bean name match!
at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:100)
at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:56)
at beanfactoryannotation.sample.beanfactoryannotationutilsproblem.Application.main(Application.java:45)
2015-12-24 15:08:37.684 INFO 9524 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@11e18e8c: startup date [Thu Dec 24 15:08:34 CET 2015]; root of context hierarchy
2015-12-24 15:08:37.686 INFO 9524 --- [ Thread-1] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2015-12-24 15:08:37.691 INFO 9524 --- [ Thread-1] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown