Spring之@Autowired问题
2010-01-22 00:00:00 来源:WEB开发网<?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-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<!-- 引用@Autowired必须定义这个bean -->
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<!-- 通过构造方法装配的Bean -->
<bean id="foo" class="lavasoft.springstu.anno.Foo">
<constructor-arg index="0" type="java.lang.String" value="aaaa"/>
</bean>
<!-- 通过注解装配的Bean,我还以为它和Foo没关系呢 -->
<bean id="bar" class="lavasoft.springstu.anno.Bar"/>
</beans>
package lavasoft.springstu.anno;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* 测试自动装配Bean
*
* @author leizhimin 2009-12-23 10:55:35
*/
public class Test1 {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("lavasoft/springstu/anno/cfg1.xml");
Bar bar = (Bar) ctx.getBean("bar");
bar.f1();
}
}
运行结果:
aaaa
Process finished with exit code 0
从上面的代码中看到,Spring的注解使得配置文件的逻辑很混乱,如果项目中有大量的类似注解,那维护起来就很困难了。
建议不要使用!
出处:http://lavasoft.blog.51cto.com/62575/247831
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