Spring之@AutoWired注解

开发中依赖注入一般用@AutoWired

首先需要bean.xml文件中需要配置

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:context="http://www.springframework.org/schema/context"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-2.5.xsd"
       xmlns:p="http://www.springframework.org/schema/p">
...
<!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 --> 
<context:component-scan base-package="cn...." use-default-filters="false" >
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Component"/>
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Repository"/>
	</context:component-scan>
</beans>

其中红框中的是@AutoWired所必须的

最后测试看看

ApplicationContext ctx = new ClassPathXmlApplicationContext(bean.xml);
obj=ctx.getBean(className);