网上很多都讲不清楚。得了，还是看官网吧：
http://static.springframework.org/spring/docs/2.5.x/reference/beans.html#beans-factory-scopes
新加了@Scoped，里边可以选session、request等，不过，需要在web.xml中再配置一下：
<web-app>
...
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener><filter>
<filter-name>requestContextFilter</filter-name>
<filter-class>org.springframework.web.filter.RequestContextFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>requestContextFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
...
</web-app>
然后再给Action类加上Annotation:
@Service
@Scoped(Scope.SESSION)
@InterceptorRef("defaultStack")
public class ProxyAction extends BaseActionSupport implements ServletRequestAware
{
...
}
注意这里的import:
import com.opensymphony.xwork2.inject.Scope;
import com.opensymphony.xwork2.inject.Scoped;
Scope并非annotation！要注意，因为还有一个annotation名字就叫scope
