spring 中最重要的注解之一是@ComponentScan,它与@Configuration 注解一起用于指定我们想要扫描的包。不带参数的 @ComponentScan 告诉 Spring 扫描当前包及其所有子包。那么让我们通过一个示例项目来了解@ComponentScan Annotation。 实现:假设我们已经有一个 Java 项目,并且所有 Spring JAR 文件都导入到该项目中。现在让...
The @ComponentScan's basePackages attribute specifies which packages should be scanned for decorated beans. The @ComponentScan annotation is an alternative to <context:component-scan> XML tag. Spring @ComponentScan exampleThe application enables component scanning with @ComponentScan. We have one ...
1. 加载配置 配置文件/注解扫描:容器根据配置(XML、JavaConfig 或注解)定位需要加载的资源。 XML:通过ClassPathXmlApplicationContext加载applicationContext.xml。 注解:通过AnnotationConfigApplicationContext扫描@ComponentScan指定的包。 资源解析:BeanDefinitionReader读取配置,...
直接指定包名:如@ComponentScan("com.example.demo"),等同于@ComponentScan(basePackages = {"com.example.demo"}),Spring会扫描指定包下的所有类,并查找其中带有@Component、@Service、@Repository等注解的组件,然后将这些组件注册为Spring容器的bean。 指定包含特定类的包:如@ComponentScan(basePackageClasses = {Exa...
<context:annotation-config> 和 <context:component-scan>的区别 <context:annotation-config>是用于激活那些已经在spring容器里注册过的bean(无论是通过xml的方式还是通过package sanning的方式)上面的注解。 <context:component-scan>除了具有<context:annotation-config>的功能之外,<context:component-scan>还可以在指定...
@Repeatable(ComponentScans.class)public@interfaceComponentScan {/*** 对应的包扫描路径 可以是单个路径,也可以是扫描的路径数组 * Alias for {@link#basePackages}. * Allows for more concise annotation declarations if no other attributes * are needed — for example, {@code@ComponentScan("org.my.pkg...
<context:component-scan>做了<context:annotation-config>要做的事情,还额外支持@Component,@Repository,@Service,@Controller注解。 并且<context:component-scan>扫描base-package并且在application context中注册扫描的beans. 所以配置<context:component-scan>就不需要配置<context:annotation- config/> ...
In the following code, we see the SimpleExample class both decorated with the @ComponentScan annotation and loaded into Spring's ApplicationContext when the Spring IoC container is initialized. The ApplicationContext is the name of the Java interface that represents the Spring IoC container. ...
By inspecting content of this.includeFilters, we can know that Spring framework considers @Component and @Named as qualified annotation for automatic component scan logic. Back to my example, since my bean class has @named annotated, In the runtime, this annotation written in class source code ...
(using basepackageclasses parameter). let’s see an example of @componentscan annotation usage: @configuration @componentscan( basepackages = {"com.baeldung.demopackage"}, basepackageclasses = demobean.class) public class componentscanexample { // ... } 4. @entityscan vs. @componentscan in ...