springmvc @Resource 注解方式问题

如下代码：在自动注入是采用 @Autowired 可以 但是为什么使用@Resource不行呢

在网上看了几个@Autowired和@Resource的区别 但还是不明白两个具体不同的配置

 

HelloController类

public class HelloController implements Controller{

 private Logger logger = Logger.getLogger(this.getClass().getName());
 private String helloWorld; // 该属性用于获取配置文件中的helloWorld属性
 private String viewPage;        // 用于获取配置文件中的viewPage属性
 @Autowired  为什么不能使用@Resource
 private HelloService helloService;
 @SuppressWarnings("unchecked")
 public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse res)throws ServletException, IOException {             
  // 在该方法中处理用户请求
  Map model = new HashMap();
  model.put("helloWorld", getHelloWorld());
  String ss=helloService.getId();
  //model.put("id",helloService.getId());
  //req.setAttribute("ss",ss);
  // 将helloWorld属性存入model中
  res.getWriter().write(ss); 
  return null; 
  // 调用getViewPage获取要返回的页面
  }     
 public void setViewPage(String viewPage){         
  this.viewPage = viewPage;    
  }   
 public String getViewPage(){        
   return this.viewPage;     
  }     
 public void setHelloWorld(String helloWorld){   
   this.helloWorld = helloWorld;    
   }    
 public String getHelloWorld(){     
   return this.helloWorld;    
  }
 }

HelloDao类

@Repository
public class HelloDao {
   static ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
  //得到数据源
   private static DataSource ds=(DataSource) context.getBean("dataSource");
   static JdbcTemplate jt1=(JdbcTemplate) context.getBean("jt"); 
   public String getId(){
    String sql =" select * from test order by id asc limit 1 ";
   Map map =jt1.queryForMap(sql);
   System.out.println(""+map.get("id"));
   return map.get("id").toString();
   }

}

HelloService类

@Service
public class HelloService {
 @Autowired  为什么不能使用@Resource
 private HelloDao helleDao;
 
 
 @Cacheable(modelId="testCaching")
 public String getId(){
  helleDao.getId();
  return helleDao.getId();
  
 }
}
applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
 
 xmlns="http://www.springframework.org/schema/beans"
 xmlns:ehcache="http://www.springmodules.org/schema/ehcache"
 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.springmodules.org/schema/ehcache
 http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-2.5.xsd
 " default-autowire="byName">
 
  <context:annotation-config/>
 <bean id="jt" class="org.springframework.jdbc.core.JdbcTemplate">
   <property name="dataSource">
    <ref local="dataSource" />
   </property>
 </bean>
  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   <property name="driverClassName">
    <value>com.mysql.jdbc.Driver</value>
   </property>
   <property name="url">
    <value>jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&amp;characterEncoding=UTF-8</value>
   </property>
   <property name="username">
    <value>root</value>
   </property>
   <property name="password">
    <value>root</value>
   </property>
  </bean>
  <context:component-scan base-package="test.t" ></context:component-scan>
  <ehcache:config configLocation="classpath:ehcache.xml" id="cacheProvider"/>
  <ehcache:annotations providerId="cacheProvider">
   <ehcache:caching cacheName="testCache" id="testCaching"/>
   <ehcache:flushing cacheNames="testCache" id="testFlushing" />
  </ehcache:annotations>
</beans>

 

 

dispatcherServlet-servlet.xml

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 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.xsd">
 <bean id="localeResolver"
  class="org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver">
 </bean>
 <!--配置控制器的映射-->
 <bean id="urlMapping"
  class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
  <property name="mappings">
   <props>
    <prop key="helloWorld.do">helloWorldAction</prop>
   </props>
  </property>
 </bean>
 <!--配置视图-->
 <bean id="viewResolver"
  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="viewClass">
   <value>
    org.springframework.web.servlet.view.InternalResourceView
   </value>
  </property>
 </bean>
 <!--指定控制器的实现类，并且配置其参数的值-->
 <bean id="helloWorldAction"
  class="test.t.HelloController">
  <property name="helloWorld">
   <value>Hello Spring World!</value>
  </property>
  <property name="viewPage">
   <value>sayHello.jsp</value>
  </property>
 </bean>
 <import resource="classpath:applicationContext.xml"/>
</beans>
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 <servlet>
  <servlet-name>dispatcherServlet</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 </servlet>
  <servlet>
  <servlet-name>simpleservlet</servlet-name>
  <servlet-class>test.SimpleServlet</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>dispatcherServlet</servlet-name>
  <url-pattern>*.do</url-pattern>
 </servlet-mapping>
  <servlet-mapping>
  <servlet-name>simpleservlet</servlet-name>
  <url-pattern>/simpeservlet</url-pattern>
 </servlet-mapping>
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
 <login-config>
  <auth-method>BASIC</auth-method>
 </login-config>
</web-app>

评论

2 楼 青春的、脚步 2013-04-10  

chen_yongkai 写道

@Resource
private HelloService helloService;

要定义以"helloService"为名称的bean

-----------------------------------------------
就这个区别？

1 楼 chen_yongkai 2011-09-07  

@Resource
private HelloService helloService;

要定义以"helloService"为名称的bean