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在web当中应用，要有以下两个开发包，
jdom.jar：jdom开源项目中(http://www.jdom.org/)
rome.jar : rome开源项目中(http://wiki.java.net/bin/view/javawsxml/rome)
关于rss在javaweb中的应用，分为两个步骤实施：
1.生成rss格式的xml文件：
private static final string date_format = "yyyy-mm-dd";
public static void main(string[] args) {
boolean ok = false;
if (args.length==2) {
try {
string feedtype = args[0];
string filename = args[1];
dateformat dateparser = new simpledateformat(date_format);
syndfeed feed = new syndfeedimpl(); //feed流
feed.setfeedtype(feedtype); //设置rss版本
feed.settitle("sample feed (created with rome)"); //< title>设置标题
feed.setlink(http://www.cs.net); //< link>
feed.setdescription("this feed has been created using rome (java syndication utilities");
list entries = new arraylist();
syndentry entry;
syndcontent description;
entry = new syndentryimpl(); //子节点
entry.settitle("rome v1.0");
entry.setlink(http://www.cs.net);
entry.setpublisheddate(dateparser.parse("2004-06-08"));
description = new syndcontentimpl();
description.settype("text/plain");
description.setvalue("initial release of rome");
entry.setdescription(description);
entries.add(entry);
entry = new syndentryimpl();
entry.settitle("rome v2.0");
entry.setlink(http://ww.cs.net);
entry.setpublisheddate(dateparser.parse("2004-06-16"));
description = new syndcontentimpl(); //描述
description.settype("text/xml");
description.setvalue("bug fixes, < xml>xml< /xml> minor api changes and some new features");
entry.setdescription(description);
entries.add(entry);
entry = new syndentryimpl();
entry.settitle("rome v3.0");
entry.setlink("http://www.cs.net");
entry.setpublisheddate(dateparser.parse("2004-07-27"));
description = new syndcontentimpl();
description.settype("text/html");
description.setvalue("< p>more bug fixes, mor api changes, some new features and some unit testing< /p>"+
"< p>for details check the < a href=\"http://www.cs.net\">changes log< /a>< /p>");
entry.setdescription(description);
entries.add(entry);
feed.setentries(entries); //设置子节点
writer writer = new filewriter(filename);
syndfeedoutput output = new syndfeedoutput();
output.output(feed,writer); //写到文件中去
writer.close();
system.out.println("the feed has been written to the file ["+filename+"]");
ok = true;
}
catch (exception ex) {
ex.printstacktrace();
system.out.println("error: "+ex.getmessage());
}
}
if (!ok) {
system.out.println();
system.out.println("feedwriter creates a rss/atom feed and writes it to a file.");
system.out.println("the first parameter must be the syndication format for the feed");
system.out.println(" (rss_0.90, rss_0.91, rss_0.92, rss_0.93, rss_0.94, rss_1.0 rss_2.0 or atom_0.3)");
system.out.println("the second parameter must be the file name for the feed");
system.out.println();
}
}
}
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和 "rss在web开发过程中的全方位应用。" 有关的java编程小帖士：
strong>Locale.equals
比较当前Locale对象和作为参数传入的Locale对象。
语法
public boolean equals ( Object obj );
参数
obj
与当前Locale对象相比较的对象。
返回值
如果两个Locale对象合理地相等（logically equivalent），则返回true，否则返回false。
说明
用这个方法比较当前Locale对象和作为参数传入的Locale对象。如果两个Locale对象描述的是同一个场所，则返回true。
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2.对此xml文件的读取：
< %@page pageencoding="utf-8"%>
< html>
< head>
< meta http-equiv="content-type" content="text/html; charset=utf-8">
< title>sina news< /title>
< /head>
< body>
< %
java.util.properties systemsettings = system.getproperties();
systemsettings.put("http.proxyhost", "mywebcache.com");
systemsettings.put("http.proxyport", "8080");
system.setproperties(systemsettings);
string urlstr = "http://rss.sina.com.cn/news/marquee/ddt.xml";
java.net.urlconnection feedurl = new java.net.url(urlstr).openconnection();
feedurl.setrequestproperty("user-agent", "mozilla/4.0 (compatible; msie 5.0; windows nt; digext)");
com.sun.syndication.io.syndfeedinput input = new com.sun.syndication.io.syndfeedinput();
com.sun.syndication.feed.synd.syndfeed feed = input.build(new com.sun.syndication.io.xmlreader(feedurl));
%>
< div align="center">
< h1>< %=feed.gettitle()%>< /h1>
< table border=1 cellpadding=3 width="700">
< tr>
< th>number< /th>
< th>title< /th>
< th>time< /th>
< /tr>
< %
java.util.list list = feed.getentries();
for (int i=0; i< list.size(); i++) {
com.sun.syndication.feed.synd.syndentry entry = (com.sun.syndication.feed.synd.syndentry)list.get(i);
%>
< tr>
< td>< %=i+1%>< /td>
< td>< a href="< %=entry.getlink()%>">< %=entry.gettitle()%>< /a>< /td>
< td>< %=entry.getpublisheddate()%>< /td>
< /tr>
< %}%>
< /table>
< /div>
< br>
< /body>
< /html>
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