java读取rss_JAVA_编程开发_程序员俱乐部

用到的jar包为jdom.jar，rome-0.9.jar

package com.gary.util.rss;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.List;

import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.XmlReader;

/**
 * RSS/Atom
 * 支持从文件或URL读取
 * @author gary
 *
 */
public class FeedReader {
	
    public static void main(String[] args) {
    	String source = "http://www.oschina.net/project/rss";
//    	String source = "rss_local_example.xml";
        try {
        	//输出发布日期,链接,标题等内容,可自定义
        	String[] outputContent = {"publishedDate","link","title"};
			print(read(source).getEntries(), outputContent);
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (FeedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
    }

    /**
     * 输出
     * @param entries 	内容
     * @param args		要输出的列名称
     * @throws SecurityException
     * @throws NoSuchMethodException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    public static void print(List<SyndEntry> entries, String[] args) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException{
    	for (int i = 0; i < entries.size(); i++) {
    		SyndEntry entry = (SyndEntry) entries.get(i);
    		Object o = entry;
    		Class<? extends Object> cls = o.getClass();
    		Method m = null;
    		
    		for (int j = 0; j < args.length; j++) {
    			String methodName = "get" + args[j].substring(0,1).toUpperCase() + args[j].substring(1);
    			m=cls.getMethod(methodName, null);
    			System.out.println(args[j]+":"+m.invoke(o, null));
    		}
    		System.out.println("==========================================");
    	}
    }
    
    /**
     * 读取
     * @param source 目标
     * @return
     * @throws IOException 
     * @throws FeedException 
     * @throws IllegalArgumentException 
     */
    public static SyndFeed read(String source) throws IllegalArgumentException, FeedException, IOException{
    	
    	//SyndFeedInput:从远程读到xml结构的内容转成SyndFeedImpl实例
        SyndFeedInput input = new SyndFeedInput();
        
        SyndFeed feed = null;
    	if(source.startsWith("http")){
    		URL feedUrl = new URL(source);
    		//rome按SyndFeed类型生成rss和atom的实例,
            //SyndFeed是rss和atom实现类SyndFeedImpl的接口
    		feed = input.build(new XmlReader(feedUrl));
    	}else{
    		File feedUrl = new File(source);
    		feed = input.build(new XmlReader(feedUrl));
    	}
        return feed;
    }
}