spring注解和jdk注解简单概述

spring的注解

@Autowired@Qualifier

配合applicationContext.xml

1     <bean id="myNewsAction" class="news.action.NewsAction" scope="prototype"></bean>
2     
3     <bean id="myNewsService" class="news.service.NewsServiceImpl" scope="prototype"></bean>
4     
5     <bean id="myNewsDao" class="news.dao.NewsDaoImpl" scope="prototype"></bean> 

完成

jdk的注解

@Controller @Service @Repository

@Controller这个是注入service的实例

1 @Controller("myNewsAction")
2 @Scope("prototype")
3 public class NewsAction extends ActionSupport {
4     
5     private NewsService ns;

@Service是注入dao实例的

1 @Service("myNewsService")
2 @Scope("prototype")
3 public class NewsServiceImpl implements NewsService {
4 
5     private NewsDao nd;

@Repository这个是注入SessionFactory实例的

1 @Repository("myNewsDao")
2 @Scope("prototype")    
3 public class NewsDaoImpl implements NewsDao {
4     
5      private SessionFactory sf;

两种注解都有各的好处，spring的注解可读性强，jdk的注解节省代码，看情况选择