在Spring中,我们可以使用@ComponentScan注解来配置要扫描的包。@ComponentScan注解可以放在配置类上,用来指定要扫描的包路径。以下是一些常见的配置方式:

扫描单个包:

@Configuration@ComponentScan(basePackages = "com.example.package")public class AppConfig {// 配置其他Bean}

扫描多个包:

@Configuration@ComponentScan(basePackages = {"com.example.package1", "com.example.package2"})public class AppConfig {// 配置其他Bean}

扫描指定包及其子包:

@Configuration@ComponentScan(basePackages = "com.example.package",includeFilters = {@ComponentScan.Filter(type = FilterType.REGEX, pattern = "com.example.package.*")})public class AppConfig {// 配置其他Bean}

扫描指定包下的特定类:

@Configuration@ComponentScan(basePackages = "com.example.package",includeFilters = {@ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = MyComponent.class)})public class AppConfig {// 配置其他Bean}

扫描指定包下带有特定注解的类:

@Configuration@ComponentScan(basePackages = "com.example.package",includeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = MyAnnotation.class)})public class AppConfig {// 配置其他Bean}

注意:默认情况下,@ComponentScan会自动扫描与配置类相同的包及其子包。你还可以使用basePackageClasses属性,指定一个或多个类,Spring将扫描这些类所在的包及其子包。