整合Struts与Spring的三种方式

1.在Struts 中使用WebApplicationContext 调用spring.
1）加载spring 的Bean文件。
<listener>
ContextLoaderListener
</listener>

2）访问spring 的Bean 对象。
WebapplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);
UserBean userBean = (UserBean)ctx.getBean("userBean");

2.配置Struts 的Action 托管给Spring.
1) 在Struts-config.xml 中配置ContextLoaderPlugIn 插件，来加载spring 配置。
<set-property property ="" value="/WEB-INF/applicationContext.xml"/>

2)配置Action托管给spring.分两种方式：
(1)在struts-config.xml中配置使用spring的DelegatingRequestProcessor,
来重载struts默认的RequestProcessor.
使用DelegatingRequestProcessor

<controller>DelegatingRequestProcessor</controller>

<action path="/usr" type ="com.....UserAction"/>

<bean name="/usr" class ="com.....UserAction"/>

(2)将struts-config.xml中<action-mapping>的type 属性设为DelegatingActionProxy.
使用DelegatingActionProxy
<action path="/usr" type ="or.springframework.web.struts.DelegatingActionProxy">
<forward name="" path=""/>
</action>

<bean name ="" class="com.....UserAction"/>

3.继承Spring的ActionSupport 类。

public class UserAction extends DispatchActionSupport {
 public ActionForward execute(ActionMapping mapping,ActionForm form,
 HttpServletRequest request,HttpServletResponse response) throws Exception{

 WebApplicationContext ctx = getWebApplicationContext();
 UserBean userBean = (UserBean)ctx.getBean("userBean");
 return mapping.findForward("success");

  }

}