Spring Portlet MVC开发入门示例

openkk 10年前

本文通过一个简单实例介绍一下Spring 的Portlet MVC框架.

Spring Portlet MVC和其Web MVC可以说是如出一辙,只是在Web MVC中处于核心的DispatcherServlet在Portlet MVC中换成了DispatcherPortlet,如下图描述了Portlet request是如何被处理的.关于Spring 的Web MVC,请参照 http://blog.csdn.net/kkdelta/article/details/7274708

Spring Portlet MVC开发入门示例

图片来源于Portlets inAction.

DispatcherPortlet配置在portlet.xml文件中,它继承了Portlet标准中的GenericPortlet,所以它本 质上是一个能够将Portlet Request dispatch到Spring框架中其它MVC组件的一个Portlet.配置如下:

    <portlet>            <portlet-name>helloWorld</portlet-name>            <portlet-class>org.springframework.web.portlet.DispatcherPortlet</portlet-class>            <supports>                <mime-type>text/html</mime-type>                <portlet-mode>view</portlet-mode>            </supports>            <resource-bundle>content.Language-ext</resource-bundle>            <portlet-info>                <title>Hello World</title>            </portlet-info>        </portlet>  

这 里以Render Request处理为例,当DispatcherPortlet接收到Request的时候,它会根据handermapping的配置找到相应的 Controler来处理请求.Controler处理完后返回一个ModelAndView,对于View的处理则和Web MVC类似了,这里不再做介绍.
xml version="1.0" encoding="UTF-8"?>    <beans xmlns="http://www.springframework.org/schema/beans"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"        xmlns:context="http://www.springframework.org/schema/context"        xsi:schemaLocation="            http://www.springframework.org/schema/beans            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd            http://www.springframework.org/schema/context            http://www.springframework.org/schema/context/spring-context-3.0.xsd">            <bean id="helloWorldController"            class="chapter07.code.listing.HelloWorldController"/>                <bean id="portletModeHandlerMapping"            class="org.springframework.web.portlet.handler.PortletModeHandlerMapping">            <property name="portletModeMap">                <map>                    <entry key="view">                        <ref bean="helloWorldController" />                    entry>                map>            property>        bean>        <bean id="viewResolver"            class="org.springframework.web.servlet.view.InternalResourceViewResolver">            <property name="viewClass"                value="org.springframework.web.servlet.view.JstlView" />            <property name="prefix" value="/WEB-INF/jsp/" />            <property name="suffix" value=".jsp" />        bean>    beans>        public class HelloWorldController implements Controller {        public void handleActionRequest(ActionRequest request,                ActionResponse response) throws Exception {            //-- do nothing the Hello World portlet doesn't receive            //-- action requests.        }            public ModelAndView handleRenderRequest(RenderRequest request,                RenderResponse response) throws Exception {            Map<String, Object> model = new HashMap<String, Object>();            model.put("helloWorldMessage", "Hello World");            return new ModelAndView("helloWorld", model);        }    }  

本文的例子参照了Portlets in Action,完整代码可以从http://download.csdn.net/detail/kkdelta/4125924下载.

这个例子可以运行在Liferay的Portal server上,关于Portlet和LifeRay的介绍可以参考 http://blog.csdn.net/kkdelta/article/category/1082877

Spring的Controller提供了处理Render request和Action request的方法,对于处理Event和resource类型的request可以分别实现EventAwareController和 ResourceAwareController.

同时通过注解的方式也可以mapping响应的request到具体的方法进行处理.Spring提供了@Controller,@RenderMapping和@ActionMapping等等.