以下示例说明如何使用Spring Web MVC Framework生成RSS Feed.首先,让我们使用一个可用的Eclipse IDE,然后考虑以下步骤,使用Spring Web Framework开发基于动态表单的Web应用程序.
Step | 描述 |
---|---|
1 | 在com.it1352包下创建一个名为TestWeb的项目,如下所述Spring MVC - Hello World章. |
2 | 在com.it1352包下创建Java类RSSMessage,RSSFeedViewer和RSSController. |
3 | 下载Rome图书馆及其依赖Rome-utils,jdom和slf4j来自同一个maven存储库页面.把它们放在你的CLASSPATH中. |
4 | 创建SRC文件夹下的属性文件messages.properties. |
5 | 最后一步是创建源文件和配置文件的内容并导出应用程序,如下所述. |
package com.it1352; 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; } }
package com.it1352; 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("TutorialsPoint Dot Com"); feed.setDescription("Java Tutorials and Examples"); feed.setLink("http://www.IT屋.com"); 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; } }
package com.it1352; 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 Tutorial"); content.setUrl("http://www.IT屋/spring"); content.setSummary("Spring tutorial summary..."); content.setCreatedDate(new Date()); items.add(content); RSSMessage content2 = new RSSMessage(); content2.setTitle("Spring MVC"); content2.setUrl("http://www.IT屋/springmvc"); 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; } }
<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.IT屋" /> <bean class = "org.springframework.web.servlet.view.BeanNameViewResolver" /> <bean id = "rssViewer" class = "com.IT屋.RSSFeedViewer" /> </beans>
在这里,我们创建了一个RSS提要POJO RSSMessage和一个RSS消息查看器,它扩展了 AbstractRssFeedView 并覆盖了它的方法.在RSSController中,我们生成了一个示例RSS Feed.
完成创建源文件和配置文件后,导出应用程序.右键单击您的应用程序,使用 Export → WAR文件选项并将 TestWeb.war 文件保存在Tomcat的webapps文件夹中.
现在,启动Tomcat服务器并确保能够使用标准浏览器从webapps文件夹访问其他网页.尝试一下URL : http://localhost:8080/TestWeb/rssfeed 我们将看到以下屏幕.