Java关于Spring概要文件有例外吗？

当我测试Spring概要文件时，我创建了一个名为“student”的类，并添加注释@profile（“prod”）来测试CreateBean

@Component
public class Student{
  private String name;
  private int age;

  public Student(String name,int age){
    this.name = name;
    this.age = age;
  }

  //getter and setter toString()
}

爪哇波乔

这是一个配置类

@Configuration
@ComponentScan("com.lucky.profile")
public class ProfileConfig{

  @Bean
  @Profile("prod")
  public Student student(){
    return new Student("jack",12);
  }
}

但是bean不能被创建，我不知道这个问题的原因是什么。 我试图在ProfileConfig.class中删除注释@Profile（“prod”），当我删除注释时，可以创建bean，但是当我再次添加注释时，仍然存在此未满足的PendencyException

@RunWith(SpringJunit4ClassRunner.class)
@ContextConfiguration(classes={ProfileConfig.class})
@ActiveProfiles("prod")
public class ProfileActiveTest{
    @Test
    public void test1(){
        ApplicationContext ctx = new AnnotationConfigApplicationContext(ProfileConfig.class);
        Student student = ctx.getBean("student");
        System.out.println(student.toString());
    }
}

org.springframework.beans.factory.UnsatifiedDependencyException:创建名为“student”的bean时出错[E:\work\U spaces\spring4\U Workspace\springInAction\chapter3\U a\target\classes\com\lucky\profile\student.class]：通过构造函数参数0表示的未满足的依赖关系；嵌套异常为org.springframework.beans.factory.NoSuchBeanDefinitionException:没有类型为“java.lang.String”的符合条件的bean可用：至少需要1个符合autowire候选条件的bean。依赖项批注：{}
位于org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray（ConstructorResolver.java:729）
位于org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor（ConstructorResolver.java:192）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor（AbstractAutowireCapableBeanFactory.java:1270）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1127）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:545）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:502）
位于org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0（AbstractBeanFactory.java:312）
位于org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）
位于org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:310）
位于org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:200）
位于org.springframework.beans.factory.support.DefaultListableBeanFactory.PreInstanceSingleton（DefaultListableBeanFactory.java:758）
位于org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:868）
位于org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:549）
位于org.springframework.context.annotation.AnnotationConfigApplicationContext。（AnnotationConfigApplicationContext.java:88）
位于com.lucky.profile.ProfileActiveTest.test（ProfileActiveTest.java:24）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:498）
位于org.junit.runners.model.FrameworkMethod$1.runReflectVeCall（FrameworkMethod.java:50）
位于org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）
位于org.junit.runners.model.FrameworkMethod.invokeeexplosive（FrameworkMethod.java:47）
位于org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）
位于org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate（RunBeforeTestExecutionCallbacks.java:73）
位于org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate（RunAfterTestExecutionCallbacks.java:83）
位于org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate（RunBeforeTestMethodCallbacks.java:75）
位于org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate（RunAfterTestMethodCallbacks.java:86）
位于org.springframework.test.context.junit4.statements.SpringRepeat.evaluate（SpringRepeat.java:84）
位于org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:251）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:97）
位于org.junit.runners.ParentRunner$3.run（ParentRunner.java:290）
位于org.junit.runners.ParentRunner$1.schedule（ParentRunner.java:71）
位于org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）
访问org.junit.runners.ParentRunner.access$000（ParentRunner.java:58）
位于org.junit.runners.ParentRunner$2.evaluate（ParentRunner.java:268）
位于org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61）
位于org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:70）
位于org.junit.runners.ParentRunner.run（ParentRunner.java:363）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:190）
位于org.junit.runner.JUnitCore.run（JUnitCore.java:137）
位于com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs（JUnit4IdeaTestRunner.java:68）
位于com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs（IdeaTestRunner.java:33）
位于com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart（JUnitStarter.java:230）
位于com.intellij.rt.junit.JUnitStarter.main（JUnitStarter.java:58）
原因：org.springframework.beans.factory.NoSuchBean定义异常：没有可用的“java.lang.String”类型的合格bean：至少需要1个符合autowire候选条件的bean。依赖项批注：{}
在
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'student' defined in file [E:\work_spaces\spring4_workspaces\springInAction\chapter3_a\target\classes\com\lucky\profile\Student.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.lang.String' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:729)
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:192)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1270)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:88)
    at com.lucky.profile.ProfileActiveTest.test(ProfileActiveTest.java:24)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.lang.String' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1504)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:721)
    ... 44 more

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = Config.class)
@ActiveProfiles("prod")
public class SpringExampleTest {

    @Autowired
    private Student student;

    @Autowired
    private ApplicationContext context;

    @Test
    public void test() {
        // Just using the bean
        System.out.println(student.getName());

        // Getting it through application context
        System.out.println(((Student)context.getBean("student")).getName());
    }
}


class Student {
    private String name;
    private int age;

    public Student(final String name, final int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

@Configuration
class Config {

    @Bean
    @Profile("prod")
    public Student student() {
        return new Student("Andy", 27);
    }
}