下面的示例演示如何使用Spring Web MVC框架生成RSS源。 首先使用Eclipse IDE,并按照以下步骤使用Spring Web Framework开发基于动态表单的Web应用程序:
com.zyiz.springmvc
包下创建三个Java类:RSSMessage
, RSSFeedViewer
和 RSSController
。maven
存储库页面下载 Rome 库及其依赖项rome-utils,jdom和slf4j。和所需的依赖关系存并将它们放在CLASSPATH
中。src
文件夹下创建属性文件messages.properties
。完整的项目文件目录结构如下所示 -
RSSMessage.java 的代码如下所示 -
package com.zyiz.springmvc; import java.util.Date; public class RSSMessage { String title; String url; String summary; Date createdDate; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getSummary() { return summary; } public void setSummary(String summary) { this.summary = summary; } public Date getCreatedDate() { return createdDate; } public void setCreatedDate(Date createdDate) { this.createdDate = createdDate; } }
RSSFeedViewer.java 的代码如下所示 -
package com.zyiz.springmvc; import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.view.feed.AbstractRssFeedView; import com.rometools.rome.feed.rss.Channel; import com.rometools.rome.feed.rss.Content; import com.rometools.rome.feed.rss.Item; public class RSSFeedViewer extends AbstractRssFeedView { @Override protected void buildFeedMetadata(Map<String, Object> model, Channel feed, HttpServletRequest request) { feed.setTitle("zyizPoint Dot Com"); feed.setDescription("Java zyiz and Examples"); feed.setLink("http://www.zyiz.net"); super.buildFeedMetadata(model, feed, request); } @Override protected List<Item> buildFeedItems(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception { List<RSSMessage> listContent = (List<RSSMessage>) model.get("feedContent"); List<Item> items = new ArrayList<Item>(listContent.size()); for(RSSMessage tempContent : listContent ){ Item item = new Item(); Content content = new Content(); content.setValue(tempContent.getSummary()); item.setContent(content); item.setTitle(tempContent.getTitle()); item.setLink(tempContent.getUrl()); item.setPubDate(tempContent.getCreatedDate()); items.add(item); } return items; } }
RSSController.java 文件中的代码如下所示 -
import java.util.ArrayList; import java.util.Date; import java.util.List; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; @Controller public class RSSController { @RequestMapping(value="/rssfeed", method = RequestMethod.GET) public ModelAndView getFeedInRss() { List<RSSMessage> items = new ArrayList<RSSMessage>(); RSSMessage content = new RSSMessage(); content.setTitle("Spring教程"); content.setUrl("http://www.zyiz/spring"); content.setSummary("Spring tutorial summary..."); content.setCreatedDate(new Date()); items.add(content); RSSMessage content2 = new RSSMessage(); content2.setTitle("Spring MVC教程"); content2.setUrl("http://www.zyiz/spring_mvc"); content2.setSummary("Spring MVC tutorial summary..."); content2.setCreatedDate(new Date()); items.add(content2); ModelAndView mav = new ModelAndView(); mav.setViewName("rssViewer"); mav.addObject("feedContent", items); return mav; } }
GenerateRSSFeed-servlet.xml 配置如下所示 -
<beans xmlns="http://www.springframework.org/schema/beans" 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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:component-scan base-package="com.zyiz.springmvc" /> <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" /> <bean id="rssViewer" class="com.zyiz.springmvc.RSSFeedViewer" /> </beans>
上面的代码中创建了一个RSS feed POJO RSSMessage和一个RSS Message Viewer,它扩展了AbstractRssFeedView
并覆盖了它的方法。 在RSSController
中,生成了一个示例RSS Feed
。
完成创建源和配置文件后,发布应用程序到Tomcat服务器。
现在启动Tomcat服务器,当访问URL => http://localhost:8080/GenerateRSSFeed/rssfeed , 如果Spring Web应用程序没有问题,应该看到以下结果: