UnsatisfiedDependencyException: Unsatisfied dependency expressed through field ‘person‘

你的名字 2022-08-31 02:14 7阅读 0赞

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.wanakiko.springboot.SpringbootQuickstartApplicationTests': Unsatisfied dependency expressed through field 'person'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.wanakiko.domain.Person' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1413) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:399) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:119) ~[spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:43) ~[spring-boot-test-autoconfigure-2.5.2.jar:2.5.2]
    	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244) ~[spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) [spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-5.3.8.jar:5.3.8]
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.13.2.jar:4.13.2]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) [spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.3.8.jar:5.3.8]
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) [junit-4.13.2.jar:4.13.2]
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) [junit-4.13.2.jar:4.13.2]
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) [junit-4.13.2.jar:4.13.2]
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) [junit-4.13.2.jar:4.13.2]
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) [junit-4.13.2.jar:4.13.2]
    	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.3.8.jar:5.3.8]
    	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.3.8.jar:5.3.8]
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) [junit-4.13.2.jar:4.13.2]
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413) [junit-4.13.2.jar:4.13.2]
    	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.3.8.jar:5.3.8]
    	at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.13.2.jar:4.13.2]
    	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:na]
    	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) [junit-rt.jar:na]
    	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) [junit-rt.jar:na]
    	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) [junit-rt.jar:na]
    Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.wanakiko.domain.Person' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1790) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1346) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.8.jar:5.3.8]
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.3.8.jar:5.3.8]
    	... 30 common frames omitted

UnsatisfiedDependencyException：不满足依赖异常，Spring Boot没有找到正确的注解配置，此时可以将错误锁定在主运行程序中，一定是程序启动时未扫描到注解导致程序运行失败。

应对措施：在主控制器类上添加@ComponentScan用以扫描指定的程序包，此时可以忽略@Autowired按类型自动注入的错误提示。  
![在这里插入图片描述][5dc8904970986010accb3f4f48fa5395.png_pic_center]

![在这里插入图片描述][26105934a42a91b63d755250bcbebbe5.png_pic_center]  
这样一来即使程序出现编译错误也同样能够运行成功，定义在application.yml中的实体数据可以被成功注入。  
![在这里插入图片描述][56bd821c367dd56c2c07e0fcbf753843.png_pic_center]

.   ____          _            __ _ _
     /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
    ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
     \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
      '  |____| .__|_| |_|_| |_\__, | / / / /
     =========|_|==============|___/=/_/_/_/
     :: Spring Boot ::                (v2.5.2)
    
    2021-07-22 13:51:12.720  INFO 4784 --- [           main] w.s.SpringbootQuickstartApplicationTests : Starting SpringbootQuickstartApplicationTests using Java 1.8.0_261 on WanAkiko with PID 4784 (started by WanAkiko in D:\WanAkikoActiveFile\MyProgrammingWorkspace\WorkModuleForIntelliJIDEA\com.wanakiko.springboot\boot02_spring_initializr)
    2021-07-22 13:51:12.723  INFO 4784 --- [           main] w.s.SpringbootQuickstartApplicationTests : No active profile set, falling back to default profiles: default
    2021-07-22 13:51:16.932  INFO 4784 --- [           main] w.s.SpringbootQuickstartApplicationTests : Started SpringbootQuickstartApplicationTests in 4.717 seconds (JVM running for 10.076)
    Person{name='Angel', age=18, boss=false, birthday=Tue Jul 22 00:00:00 CST 2121, maps={code=1, number=1}, lists=[1433, 3306, 1521], pets=Pet{name='Byebye', age=2}}

**Person\{name=‘Angel’, age=18, boss=false, birthday=Tue Jul 22 00:00:00 CST 2121, maps=\{code=1, number=1\}, lists=\[1433, 3306, 1521\], pets=Pet\{name=‘Byebye’, age=2\}\}**

[5dc8904970986010accb3f4f48fa5395.png_pic_center]: /images/20220829/ff98dac4f5bf4bd3a047e41eecca224c.png
[26105934a42a91b63d755250bcbebbe5.png_pic_center]: /images/20220829/c0e8bf0215c2494cb8471f8c70c9238e.png
[56bd821c367dd56c2c07e0fcbf753843.png_pic_center]: /images/20220829/0adcfee6357b4130bced7b04e70cc25f.png