组件注册-@Import-使用ImportSelector

ImportSelector：返回需要导入的组件的全类名数组

创建一个实现了ImportSelector接口的类，然后让入Import中。ImportSelector的实现类包含了所有需要导入到容器中的组件

@Configuration
@ComponentScan("com.yyc")
@Import({Person.class, MyImportSelector.class})
public class MainConfig2 {

public class MyImportSelector implements ImportSelector {
    public String[] selectImports(AnnotationMetadata importingClassMetadata) {
        return new String[] {};
    }
}