java - Spring @ComponentScan 注释不起作用

Question

我有带有包布局的 spring boot 应用程序示例:

main:
-com.foo
     Application.java       
-com.foo.services
      ItemService.java
      ItemRepository.java    
-com.foo.config
     Configuration.java
test:
-com.foo.services 
     ItemServiceIngegrationTest.java

我的集成测试运行失败，无法找到 ItemRepository bean如果放

  @ComponentScan(basePackageClasses = { ItemService.class })

但如果我把它工作

  @ComponentScan(basePackageClasses = { Application.class })

诀窍在哪里？

规范说:

Either basePackageClasses() or basePackages() (or its alias value()) may be specified to define specific packages to scan. If specific packages are not defined, scanning will occur from the package of the class that declares this annotation.

@EnableAutoConfiguration
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { Configuration.class })
public class ItemServiceIntegrationTest { 
    . . .
}

@org.springframework.context.annotation.Configuration
@PropertySource("classpath:application.properties")
@ComponentScan(basePackageClasses = { ItemService.class })
public class Configuration extends AbstractMongoConfiguration {
   .  .  .
}   

Answer 1

javadoc 说:

If specific packages are not defined, scanning will occur from the package of the class that declares this annotation.

因此，除非定义了特定的包类，否则它会从声明 ComponentScan 的包开始扫描。你能把它放在 Application 类中吗？