Spring MVC生成RSS源

创建一个名称为 generaterssfeed 的动态web项目。
在 com.h3.springmvc 包下创建三个java类：rssmessage, rssfeedviewer 和 rsscontroller。
从相同的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。
在src文件夹下创建属性文件messages.properties。
最后一步是创建所有源和配置文件的内容并运行应用程序，详细如下所述。

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.h3.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.h3.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("h3point dot com");
      feed.setdescription("java h3 and examples");
      feed.setlink("http://www.h3.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 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.h3/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.h3/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.h3.springmvc" />
    <bean class="org.springframework.web.servlet.view.beannameviewresolver" />
    <bean id="rssviewer" class="com.h3.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：