下面的範例演示如何使用Spring Web MVC框架生成RSS源。 首先使用Eclipse IDE,並按照以下步驟使用Spring Web Framework開發基於動態表單的Web應用程式:
com.yiibai.springmvc
包下建立三個Java類:RSSMessage
, RSSFeedViewer
和 RSSController
。maven
儲存庫頁面下載 Rome 庫及其依賴項rome-utils,jdom和slf4j。和所需的依賴關係存並將它們放在CLASSPATH
中。src
檔案夾下建立屬性檔案messages.properties
。完整的專案檔案目錄結構如下所示 -
RSSMessage.java 的程式碼如下所示 -
package com.yiibai.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 的程式碼如下所示 -
package com.yiibai.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("YiibaiPoint Dot Com");
feed.setDescription("Java Yiibai and Examples");
feed.setLink("https://www.tw511.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;
}
}
RSSController.java 檔案中的程式碼如下所示 -
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教學");
content.setUrl("http://www.yiibai/spring");
content.setSummary("Spring tutorial summary...");
content.setCreatedDate(new Date());
items.add(content);
RSSMessage content2 = new RSSMessage();
content2.setTitle("Spring MVC教學");
content2.setUrl("http://www.yiibai/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 組態如下所示 -
<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.yiibai.springmvc" />
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
<bean id="rssViewer" class="com.yiibai.springmvc.RSSFeedViewer" />
</beans>
上面的程式碼中建立了一個RSS feed POJO RSSMessage和一個RSS Message Viewer,它擴充套件了AbstractRssFeedView
並覆蓋了它的方法。 在RSSController
中,生成了一個範例RSS Feed
。
完成建立源和組態檔案後,發布應用程式到Tomcat伺服器。
現在啟動Tomcat伺服器,當存取URL => http://localhost:8080/GenerateRSSFeed/rssfeed , 如果Spring Web應用程式沒有問題,應該看到以下結果: