Spring学习（三）ioc自动注入,

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搜索Bean类

Spring提供如下几个Annotation来标注Spring Bean：

@Component: 标注一个普通的Spring Bean类
@Controller: 标注一个控制器组件类
@Service: 标注一个业务逻辑组件类
@Repository: 标注一个DAO组件类

xsi:schemaLocation="       http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.xsd        http://www.springframework.org/schema/jdbc        http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd        http://www.springframework.org/schema/cache        http://www.springframework.org/schema/cache/spring-cache-3.1.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd       "       default-autowire="byName"

@Repository("UserDaoImpl")public class UserDaoImpl implements UserDao{    @Autowired    private User user;    @Override    public void say(){        user.say();    }}

public class TestSpring {    ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");    @Test    public void test1(){        UserDaoImpl userDaoImpl = ctx.getBean("UserDaoImpl", UserDaoImpl.class);        userDaoImpl.say();    }

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