RSS阅读器

[java]代码库
package com.ruanko.service;
 
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
 
import com.ruanko.dao.impl.FileDaoImpl;
import com.ruanko.model.Channel;
import com.ruanko.model.News;
import com.runko.dao.NewsDao;
 
public class RSSService
{
    private ArrayList<Channel> channelList;
    private List<News> newsList;
    private NewsDao rssDao;
     
    public RSSService()
    {
        rssDao = new FileDaoImpl();
    }
     
    public List<Channel> getChannelList()
    {
        if(channelList == null)
        {
            channelList = new ArrayList<Channel>();
             
            //创建“腾讯新闻”频道
            Channel channel1 = new Channel();
            channel1.setName("新浪国际新闻");
            channel1.setFilePath("NewsFiles/sina.xml");
            channel1.setUrl("http://rss.sina.com.cn/news/world/focus15.xml");
             
             
            //创建“腾讯-国内新闻”频道
            Channel channel2 = new Channel();
            channel2.setName("腾讯国内新闻");
            channel2.setFilePath("NewsFiles/rss_newsgn.xml");
            channel2.setUrl("http://news.qq.com/newsgn/rss_newsgn.xml");
             
            //创建“新浪网-国内要闻”频道
            Channel channel3 = new Channel();
            channel3.setName("新浪体育新闻");
            channel3.setFilePath("NewsFiles/sports.xml");
            channel3.setUrl("http://rss.sina.com.cn/roll/sports/hot_roll.xml");
             
            //创建“新浪网-国际要闻”频道
            Channel channel4 = new Channel();
            channel4.setName("新浪社会新闻");
            channel4.setFilePath("NewsFiles/socials.xml");
            channel4.setUrl("http://rss.sina.com.cn/news/society/focus15.xml");
             
            channelList.add(channel1);
            channelList.add(channel2);
            channelList.add(channel3);
            channelList.add(channel4);
        }
        return channelList;
    }
     
    public List<News> getNewsList(String filePath)
    {
        Document doc = load(filePath);
        newsList = parse(doc);
        return newsList;
    }
     
    private Document load(String filePath)
    {
        Document doc = null;
        SAXBuilder sb = new SAXBuilder(false);
         
        File fXml = new File(filePath);
        if(fXml.exists() && fXml.isFile())
        {
            try
            {
                doc = sb.build(fXml);
            }catch (JDOMException e)
            {
                e.printStackTrace();
            } catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        return doc;
    }
     
    private News itemToNews(Element item)
    {
        News news = new News();
         
        //获得节点内容
        String title = item.getChildText("title").trim();
        String link = item.getChildText("link");
        String author = item.getChildText("author");
        String guid = item.getChildText("guid");
        String pubDate = item.getChildText("pubDate");
        String category = item.getChildText("category");
        String description = item.getChildText("description").trim();
         
        //设置节点内容
        news.setTitle(title);
        news.setLink(link);
        news.setAuthor(author);
        news.setGuid(guid);
        news.setPubDate(pubDate);
        news.setCategory(category);
        news.setDescription(description);
         
        return news;
    }
     
    private List<News> parse(Document doc)
    {
        List<News> newsList = new ArrayList<News>();
        News news = null;
         
        Element root = doc.getRootElement();
         
        //获得item标签
        Element eChannel = root.getChild("channel");
        List<Element> itemList = eChannel.getChildren("item");
         
        //生成news对象列表
        for(int i = 0; i < itemList.size(); i++)
        {
            Element item = itemList.get(i);
            news = itemToNews(item);
            newsList.add(news);
        }
        return newsList;
    }
     
    public String newsToString(News news)
    {
        String content  = "";
        content = "标题："
                + news.getTitle() + "\r\n"
                + "链接："
                + news.getLink() + "\r\n"
                + "作者："
                + news.getAuthor() + "\r\n"
                + "发布时间："
                + news.getPubDate() + "\r\n"
                + "-------------------------------------------------------------\n"
                + news.getDescription() + "\r\n" + "\r\n" + "\r\n";
        return content;
    }
     
    public boolean save()
    {
        boolean flag = false;
        if(rssDao.save(newsList))
        {
            flag = true;
        }
        return flag;
    }
}
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