springboot学习4

Spring手动装配之Spring 模式注解装配：
1、模式注解

Spring Framework 注解	场景	起始版本
@Repository	数据仓储模式注解	2.0
@Component	通用组件	2.5
@Service	服务	2.5
@ControllerWeb	控制器	2.5
@Configuration	配置类	3.0

2、装配方式
1）<context:component-scan> （since spring2.5）

<?xml version="1.0" encoding="UTF-8"?>
<beans	xmlns="http://www.springframework.org/schema/beans"
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		xmlns:context="http://www.springframework.org/schema/context"
		xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context.xsd">
		<!-- 注解驱动 -->
		<context:annotation-config/>
		<!-- 把被 @Component 或者其 Annotation 标记的类，注册为 Spring Bean -->
		<context:component-scanbase-package="com.example.learndemo"/>
</beans>

2）@ComponentScan方式(since spring 3.1)

	@ComponentScan(basePackages="com.example.learndemo")
	public class SpringConfiguration {
    
     
		//...
	}

3、自定义模式注解

@Target({
    
    ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Repository
public @interface ARepository {
    
    
	String value() default"";
}

@Target({
    
    ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@ARepository
public @interface BRepository {
    
    
	String value() default"";
}