下面是在 blog-mover 中实现的一个类，直接贴源码吧（代码中可能存在的Bug，对您造成的误解，我不负责哟，要查看全部源码请访问 http://code.google.com/p/blog-mover），关于 Rome 的更多信息参见 http://rome.dev.java.net. Rome 可是出自 Sun 之手。有着这样的 package name：com.sun.syndication。
/**
* Created on 2006-9-10 上午02:32:57
*/
package com.redv.blogmover.feed;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.SystemUtils;
import com.redv.blogmover.Attachment;
import com.redv.blogmover.BlogMoverException;
import com.redv.blogmover.Comment;
import com.redv.blogmover.WebLog;
import com.redv.blogmover.impl.AbstractBlogWriter;
import com.redv.blogmover.web.DownloadFileServlet;
import com.sun.syndication.feed.synd.SyndContent;
import com.sun.syndication.feed.synd.SyndContentImpl;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndEntryImpl;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndFeedImpl;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedOutput;
/**
* 使用 <a href="https://rome.dev.java.net/">Rome</a> 将日志导出成下列格式：RSS 0.90, RSS
* 0.91 Netscape, RSS 0.91 Userland, RSS 0.92, RSS 0.93, RSS 0.94, RSS 1.0, RSS
* 2.0, Atom 0.3, and Atom 1.0。
*
* @author <a href="mailto:zhoushuqun@gmail.com">Shutra Zhou</a>
*
*/
public class RomeWriter extends AbstractBlogWriter {
private final Pattern pattern = DownloadFileServlet.TEMP_FILE_NAME_PATTERN;
private final String encoding = "UTF-8";
private SyndFeed feed;
private List<SyndEntry> entries;
private File outputFile;
private String feedType;
private String title;
private String link;
private String description;
private String language;
private String copyright;
private String author;
/**
* @return the outputFile
*/
public File getOutputFile() {
return outputFile;
}
/**
* @param outputFile
* the outputFile to set
*/
public void setOutputFile(File outputFile) {
this.outputFile = outputFile;
}
/**
*
* @param filePath
* the outputFile's name to set
*/
public void setFilename(String filename) throws BlogMoverException {
if (!pattern.matcher(filename).matches()) {
throw new BlogMoverException("Parameter filename is not matched "
+ this.pattern.pattern() + ".");
}
File tmpdir = new File(SystemUtils.JAVA_IO_TMPDIR);
this.outputFile = new File(tmpdir, filename);
}
/**
* @param author
* the author to set
*/
public void setAuthor(String author) {
this.author = author;
}
/**
* @param copyright
* the copyright to set
*/
public void setCopyright(String copyright) {
this.copyright = copyright;
}
/**
* @param description
* the description to set
*/
public void setDescription(String description) {
this.description = description;
}
/**
* @param feedType
* the feedType to set
*/
public void setFeedType(String feedType) {
this.feedType = feedType;
}
/**
* @param language
* the language to set
*/
public void setLanguage(String language) {
this.language = StringUtils.replace(language, "_", "-");
}
/**
* @param link
* the link to set
*/
public void setLink(String link) {
this.link = link;
}
/**
* @param title
* the title to set
*/
public void setTitle(String title) {
this.title = title;
}
/*
* (non-Javadoc)
*
* @see com.redv.blogmover.impl.AbstractBlogWriter#begin()
*/
@Override
protected void begin() throws BlogMoverException {
this.feed = new SyndFeedImpl();
this.feed.setEncoding(this.encoding);
this.feed.setFeedType(this.feedType);
this.feed.setTitle(this.title);
this.feed.setLink(this.link);
this.feed.setDescription(this.description);
this.feed.setLanguage(this.language);
this.feed.setCopyright(this.copyright);
this.feed.setAuthor(this.author);
this.entries = new ArrayList<SyndEntry>();
this.feed.setEntries(this.entries);
}
/*
* (non-Javadoc)
*
* @see com.redv.blogmover.impl.AbstractBlogWriter#end()
*/
@Override
protected void end() throws BlogMoverException {
SyndFeedOutput output = new SyndFeedOutput();
OutputStream outputStream = null;
Writer writer = null;
try {
outputStream = new FileOutputStream(this.outputFile);
writer = new OutputStreamWriter(outputStream, this.encoding);
output.output(feed, writer);
} catch (IOException e) {
throw new BlogMoverException(e);
} catch (FeedException e) {
throw new BlogMoverException(e);
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
log.warn(e);
}
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
log.warn(e);
}
}
}
}
/*
* (non-Javadoc)
*
* @see com.redv.blogmover.impl.AbstractBlogWriter#writeAttachment(com.redv.blogmover.Attachment)
*/
@Override
protected String writeAttachment(Attachment att) {
return null;
}
/*
* (non-Javadoc)
*
* @see com.redv.blogmover.impl.AbstractBlogWriter#writeBlog(com.redv.blogmover.WebLog,
* java.util.Map)
*/
@Override
protected void writeBlog(WebLog webLog, Map<Attachment, String> attachments)
throws BlogMoverException {
// 注意：格式 RSS 0.90, RSS 0.91 Netscape, RSS 0.91 Userland 的日志数量只能在1～15之间。
if ((this.feedType.equals("rss_0.9")
|| this.feedType.equals("rss_0.91N") || this.feedType
.equals("rss_0.91U"))
&& this.entries.size() >= 15) {
return;
}
SyndEntry entry = new SyndEntryImpl();
entry.setAuthor(this.author);
entry.setTitle(webLog.getTitle());
entry.setLink(webLog.getUrl());
entry.setPublishedDate(webLog.getPublishedDate());
entry.setUri(webLog.getUrl());
if (webLog.getExcerpt() != null) {
SyndContent description = new SyndContentImpl();
description.setType("text/html");
description.setValue(webLog.getExcerpt());
entry.setDescription(description);
} else if (this.feedType.equals("rss_2.0")) {
SyndContent description = new SyndContentImpl();
description.setType("text/html");
description.setValue("");
entry.setDescription(description);
} else {
// Do nothing.
}
List<SyndContent> contents = new ArrayList<SyndContent>();
SyndContentImpl sc = new SyndContentImpl();
sc.setType("text/html");
sc.setValue(webLog.getBody());
contents.add(sc);
entry.setContents(contents);
this.entries.add(entry);
}
/*
* (non-Javadoc)
*
* @see com.redv.blogmover.impl.AbstractBlogWriter#writeComment(com.redv.blogmover.Comment)
*/
@Override
protected void writeComment(Comment comment) throws BlogMoverException {
}
public static void main(String[] args) throws IOException, FeedException {
SyndFeedImpl feed = new SyndFeedImpl();
feed.setFeedType("rss_0.90");
feed.setTitle("site title");
feed.setLink("http://shutra.xpert.cn");
feed.setDescription("site description");
feed.setLanguage("zh-CN");
feed.setCopyright("copyright");
feed.setAuthor("author");
List<SyndEntry> entries = new ArrayList<SyndEntry>();
feed.setEntries(entries);
for (int i = 0; i < 2; i++) {
SyndEntry entry = new SyndEntryImpl();
entry.setAuthor("author");
entry.setTitle("title");
entry.setLink("http://xpert.cn/" + i);
List contents = new ArrayList();
entry.setContents(contents);
entries.add(entry);
}
SyndFeedOutput output = new SyndFeedOutput();
List l = feed.getSupportedFeedTypes();
for (Object s : l) {
feed.setFeedType(s.toString());
try {
output.output(feed, new File("C:\\tmp\\t_" + s + ".xml"));
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
by Shutra
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