分类：开源

　　作了一点完善。rss的全部代码已经提交完毕，并且用在了现在的系统中。

　　但是，我发现，至今为止，基本没有什么人用rss来订阅学习日记的的内容。我也不知道为什么？可能最主要的原因是学习日记的内容太少了，太浅了，订阅的价值不大；其次是rss订阅还不为一些朋友了解和习惯使用吧。

　　在使用rome生成的程序中，我发现了rss0.91的一些限制：例如：language是channel的必需元素，copyRight的长度不能超过１００个字符（？），description的长度不能超过？个字符

　　我生成的内容不符合这些限制，所以就不支持rss0.91了（包括RSS 0.91 Netscape 和　RSS 0.91 Userland）。

　　我只是从程序的出错信息中得知这些限制的，还没有具体去学习这些规范。

　　程序类基本完成，页面还没有做。使用rome可以较好的实现所有rss版本和atom的feed。个人认为还是应用得比较成功的。今天早上已经把全部代码和argoUML0.18.1的粗略设计提交到了cvs库。

　　主要类的实现概略：（希望得到你的意见或建议，也供想使用rome的朋友参考。）

　　１、

//$ Id: RSSAction.java,v 1.0 2006/02/26 20:49:06 dashing_meng Exp $

//Copyright (c) 2004-2005 Http://www.learndiary.com. All Rights Reserved.

//Permission to use, copy, modify, and distribute this software and its

//documentation without fee, and without a written agreement is hereby

//granted, provided that the above copyright notice and this paragraph

//appear in all copies.  This software program and documentation are

//copyrighted by http://www.learndiary.com. The software program and

//documentation are supplied "AS IS", without any accompanying services

//from The LearnDiary. The LearnDiary does not warrant that the operation

//of the program will be uninterrupted or error-free. The end-user

//understands that the program was developed for research purposes and is

//advised not to rely exclusively on the program for any reason.

//IN NO EVENT SHALL HTTP://WWW.LEARNDIARY.COM BE LIABLE TO ANY PARTY FOR

//DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,

//INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS

//DOCUMENTATION, EVEN IF HTTP://WWW.LEARNDIARY.COM HAS BEEN ADVISED OF THE

//POSSIBILITY OF SUCH DAMAGE. HTTP://WWW.LEARNDIARY.COM SPECIFICALLY

//DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

//WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE

//SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND

//HTTP://WWW.LEARNDIARY.COM HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,

//SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package com.learndiary.website.action.rss;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionForward;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.struts.action.ActionMapping;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import com.learndiary.website.util.rss.*;

import com.sun.syndication.io.FeedException;

/**

 * action for generating rss feed.

 * @author http://www.learndiary.com,LearnDiary Develop Group

 */

public class RSSAction extends Action {

  /* {src_lang=Java}*/

  private Log __log = LogFactory.getFactory().getInstance(this.getClass());

  ;

  /* {transient=false, volatile=false}*/

  /**

   *  pseudo code:

   *  {

   *    //the rss feed type,includes:

   *    //latestDiariesOfMyProcessGoal, latestAdvicesOfMyDiaries,

   *    //latestGoals, mostJoinedGoals, latestDiaries, latestAdvices,

   *    //latestDiariesOfGoal, latestAdvicesOfGoal,etc..

   *    String type=request.getParameter("type");

   *   

   *    //feed type,includes:

   *    //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, Atom 1.0

   *    String rssVersion = request.getParameter("feedType");

   * 

   *    //entries number:

   *    //user can specify how many entries he would like to see,

   *    //the default entries number is 39.

   *    int entriesNum=Integer.parseInt(request.getParemeter("entriesNum"));

   * 

   *    //user's name:

   *    //for getting specified user's entries.

   *    String userName=request.getParameter("userName");

   * 

   *    //channel article's ID:

   *    //it is only for subscribing a goal's sub-entries,goalID.

   *    int  channelID=Integer.parseInt(request.getParemeter("channelID"));

   *   

   *    if (type.equal("latestDiaries")){

   *      RSSGenerator generator = new  LatestDiariesRSS(feedType, entriesNum);

   *      generator.outputFeed();

   *    }else if(type.equal("latestAdvices")){

   *      RSSGenerator generator = new  LatestAdvicesRSS(feedType, entriesNum);

   *      generator.outputFeed();

   *    }else if(type.equal("latestDiariesOfMyProcessGoal")){

   *      RSSGenerator generator = new  LatestDiariesOfMyProcessGoalRSS(feedType, entriesNum, userName);

   *      generator.outputFeed();

   *    }else if(type.equal("latestMyDiariesOfMyProcessGoal")){

   *      RSSGenerator generator = new  LatestMyDiariesOfMyProcessGoalRSS(feedType, entriesNum, userName);

   *      generator.outputFeed();

   *    }else if(type.equal("latestAdvicesOfMyDiaries")){

   *      RSSGenerator generator = new  LatestAdvicesOfMyDiariesRSS(feedType, entriesNum, userName);

   *      generator.outputFeed();

   *    }else if(type.equal("latestDiariesOfGoal")){

   *      RSSGenerator generator = new  LatestDiariesOfGoalRSS(feedType, entriesNum, channelID);

   *      generator.outputFeed();

   *    }else if(type.equal("latestAdvicesOfGoal")){

   *      RSSGenerator generator = new  LatestAdvicesOfGoalRSS(feedType, entriesNum, channelID);

   *      generator.outputFeed();

   *    }else if(type.equal("latestGoals")){

   *      RSSGenerator generator = new  LatestGoalsRSS(feedType, entriesNum);

   *      generator.outputFeed();

   *    }else if(type.equal("mostJoinedGoals")){

   *      RSSGenerator generator = new  MostJoinedGoalsRSS(feedType, entriesNum);

   *      generator.outputFeed();

   *    }else {

   *      show "error type" message;

   *    }

   *  }//end of excute() method

   *  

   */

  public ActionForward execute(

    ActionMapping mapping,

    ActionForm form,

    HttpServletRequest request,

    HttpServletResponse response) {

    //the rss feed type,includes:

    //latestDiariesOfMyProcessGoal, latestAdvicesOfMyDiaries,

    //latestGoals, mostJoinedGoals, latestDiaries, latestAdvices,

    //latestDiariesOfGoal, latestAdvicesOfGoal,etc..

    String type = request.getParameter("type");

    //feed type,includes:

    //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, Atom 1.0

    String feedType = request.getParameter("feedType");

    //entries number:

    //user can specify how many entries he would like to see,

    //the default entries number is 39.

    int entriesNum = Integer.parseInt(request.getParameter("entriesNum"));

    //user's name:

    //for getting specified user's entries.

    String userName = request.getParameter("userName");

    //channel article's ID:

    //it is only for subscribing a goal's sub-entries,goalID.

    int channelID = 0;

    String channelIDStr = request.getParameter("channelID");

    if (channelIDStr != null && !channelIDStr.equals(""))

      channelID = Integer.parseInt(channelIDStr);

    try {

      if (type.equals("latestDiaries")) {

        RSSGenerator generator = new LatestDiariesRSS(feedType, entriesNum);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestDiaries:feedType="

            + feedType

            + " entriesNum="

            + entriesNum);

      } else if (type.equals("latestAdvices")) {

        RSSGenerator generator = new LatestAdvicesRSS(feedType, entriesNum);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestAdvices:feedType="

            + feedType

            + " entriesNum="

            + entriesNum);

      } else if (type.equals("latestDiariesOfMyProcessGoal")) {

        RSSGenerator generator =

          new LatestDiariesOfMyProcessGoalRSS(feedType, entriesNum, userName);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestDiariesOfMyProcessGoal:feedType="

            + feedType

            + " entriesNum="

            + entriesNum

            + " userName="

            + userName);

      } else if (type.equals("latestMyDiariesOfMyProcessGoal")) {

        RSSGenerator generator =

          new LatestMyDiariesOfMyProcessGoalRSS(feedType, entriesNum, userName);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestMyDiariesOfMyProcessGoal:feedType="

            + feedType

            + " entriesNum="

            + entriesNum

            + " userName="

            + userName);

      } else if (type.equals("latestAdvicesOfMyDiaries")) {

        RSSGenerator generator =

          new LatestAdvicesOfMyDiariesRSS(feedType, entriesNum, userName);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestAdvicesOfMyDiaries:feedType="

            + feedType

            + " entriesNum="

            + entriesNum

            + " userName="

            + userName);

      } else if (type.equals("latestDiariesOfGoal")) {

        RSSGenerator generator =

          new LatestDiariesOfGoalRSS(feedType, entriesNum, channelID);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestDiariesOfGoal:feedType="

            + feedType

            + " entriesNum="

            + entriesNum

            + " channelID="

            + channelID);

      } else if (type.equals("latestAdvicesOfGoal")) {

        RSSGenerator generator =

          new LatestAdvicesOfGoalRSS(feedType, entriesNum, channelID);

        generator.outputFeed(response);

        __log.info(

          "get feed of latestAdvicesOfGoal:feedType="

            + feedType

            + " entriesNum="

            + entriesNum

            + " channelID="

            + channelID);

      } else if (type.equals("latestGoals")) {

        RSSGenerator generator = new LatestGoalsRSS(feedType, entriesNum);

        generator.outputFeed(response);

        __log.info(

          "get feed of LatestGoalsRSS:feedType="

            + feedType

            + " entriesNum="

            + entriesNum);

      } else if (type.equals("mostJoinedGoals")) {

        RSSGenerator generator = new MostJoinedGoalsRSS(feedType, entriesNum);

        generator.outputFeed(response);

        __log.info(

          "get feed of mostJoinedGoals:feedType="

            + feedType

            + " entriesNum="

            + entriesNum);

      } else {

        return mapping.findForward("commonFailure");

      }

    } catch (IOException e1) {

      e1.printStackTrace();

    } catch (FeedException e2) {

      e2.printStackTrace();

    } catch (Exception e3) {

      e3.printStackTrace();

    }

    return null;

  }

}

　　２、

//$ Id: RSSGenerator.java,v1.4  2006/02/26 20:49:06 dashing_meng Exp $

//Copyright (c) 2004-2005 Http://www.learndiary.com. All Rights Reserved.

//Permission to use, copy, modify, and distribute this software and its

//documentation without fee, and without a written agreement is hereby

//granted, provided that the above copyright notice and this paragraph

//appear in all copies.  This software program and documentation are

//copyrighted by http://www.learndiary.com. The software program and

//documentation are supplied "AS IS", without any accompanying services

//from The LearnDiary. The LearnDiary does not warrant that the operation

//of the program will be uninterrupted or error-free. The end-user

//understands that the program was developed for research purposes and is

//advised not to rely exclusively on the program for any reason.

//IN NO EVENT SHALL HTTP://WWW.LEARNDIARY.COM BE LIABLE TO ANY PARTY FOR

//DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,

//INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS

//DOCUMENTATION, EVEN IF HTTP://WWW.LEARNDIARY.COM HAS BEEN ADVISED OF THE

//POSSIBILITY OF SUCH DAMAGE. HTTP://WWW.LEARNDIARY.COM SPECIFICALLY

//DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

//WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE

//SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND

//HTTP://WWW.LEARNDIARY.COM HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,

//SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package com.learndiary.website.util.rss;

import com.sun.syndication.feed.synd.SyndCategory;

import com.sun.syndication.feed.synd.SyndCategoryImpl;

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.io.FeedException;

import com.sun.syndication.io.SyndFeedOutput;

import com.learndiary.website.Constants;

import com.learndiary.website.Consts;

import com.learndiary.website.model.ArticleInfo;

import java.io.IOException;

import java.io.PrintWriter;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import org.apache.commons.logging.Log;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import com.learndiary.website.db.ArticleDB;

import com.learndiary.website.dao.TransContext;

import javax.servlet.http.HttpServletResponse;

/**

 * the base abstract class for generating rss feed.

 * @author http://www.learndiary.com,LearnDiary Develop Group

 */

public abstract class RSSGenerator {

  protected static final DateFormat DATE_PARSER =

    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

  /* {transient=false, volatile=false}*/

  protected Log __log = null; //should it be added "static" modifier?

  /* {transient=false, volatile=false}*/

  protected static TransContext trans = null;

  /* {transient=false, volatile=false}*/

  protected static ArticleDB myDB = null;

  /* {transient=false, volatile=false}*/

  protected String feedType = "rss_2.0";

  /* {transient=false, volatile=false}*/

  protected int entriesNum = 39;

  /* {transient=false, volatile=false}*/

  protected final List entries = new ArrayList();

  /* {transient=false, volatile=false}*/

  protected SyndFeed feed = null;

  /* {transient=false, volatile=false}*/

  protected String catName = null;

  /* {transient=false, volatile=false}*/

  /**

   *  output the rss feed xml page

   *  pseudo code:

   *  {

   *    res.setContentType("application/xml; charset=UTF-8");

   *    SyndFeedOutput output = new SyndFeedOutput();

   *    output.output(feed,res.getWriter());

   *  }

   * @param res the HttpServletResponse come from the excute() method of struts Action 

   */

  public void outputFeed(HttpServletResponse res)

    throws IOException, FeedException, Exception {

    try {

      this.setFeed();

    } catch (Exception e1) {

      e1.printStackTrace();

    }

    res.setContentType("application/xml; charset=UTF-8");

    SyndFeedOutput output = new SyndFeedOutput();

    PrintWriter out = res.getWriter();

    try {

      output.output(feed, out);

    } catch (IOException e) {

      e.printStackTrace();

    } catch (FeedException e) {

      e.printStackTrace();

    }

  }

  /**

   *  set rss feed

   */

  abstract protected void setFeed() throws Exception;

  /**

   *  set articles into the entries list of the rss feed

   *  {

   *    List artList=(ArrayList)myDB.getCPageList(0, entriesNum, "article", condition, Consts.ART_WRITE, Consts.DIR_DESC, Consts.HTML_FLAG);

   *    Iterator it=artList.listIterator();

   *     while (it.hasNext()) {

   *        ArticleInfo anArt = (ArticleInfo)it.next();

   *        entries.addEntry(anArt);

   *    }

   *  }

   * @param condition "WHERE" clause in the sql statement,for example:"WHERE parentID=1 AND typeID=2" 

   */

  protected void setEntries(String condition,int orderType,int direction,int htmlFlag) throws Exception {

    List artList = new ArrayList();

    __log.debug("setEntries() in RSSGenerator:entriesNum="+entriesNum+" condition is:"+condition);

    try {

      artList =

        (ArrayList) myDB.getCPageList(

          0,

          entriesNum,

          "article",

          condition,

          orderType,

          direction,

          htmlFlag);

    } catch (Exception e) {

      e.printStackTrace();

    }

    __log.debug("artList is:"+artList);

    if (artList == null)

      return;

    Iterator it = artList.listIterator();

    while (it.hasNext()) {

      ArticleInfo anArt = (ArticleInfo) it.next();

      this.addEntry(anArt);

    }

  }

  /**

   *  add an articleInfo into rss entries list

   *  pseudo code:

   *  {

   *    SyndEntry entry = new SyndEntryImpl();

   *    entry.setAuthor(anArt.getUserName());

   *    entry.setTitle(title);

   *    entry.setLink(link);

   *    entry.setPublishedDate(DATE_PARSER.parse(date));

   *    SyndContent description = new SyndContentImpl();

   *    description.setType("text/plain");

   *    description.setValue(blogContent);

   *    entry.setDescription(description);

   *    List categories = new ArrayList();

   *    SyndCategory category = new SyndCategoryImpl();

   *    category.setName(catName);

   *    categories.add(category);

   *    entry.setCategories(categories);

   *    entries.add(entry);

   *  }

   * @param anArt an article's information

   */

  private void addEntry(ArticleInfo anArt) throws Exception, ParseException {

    int artType = anArt.getTypeID();

    int artID = anArt.getArticleID();

    int parentID = anArt.getParentID();

    String parentName = anArt.getParentArticleName();

    String parentParentName = null;

    int parentType = 0;

    try {

      parentType = myDB.getArtTypeByID(parentID);

      if (parentType == Consts.DIARY_TYPE)

        parentParentName = myDB.getArtNameByID(myDB.getParentIDByID(parentID));

    } catch (Exception e1) {

      e1.printStackTrace();

    }

    String artName = anArt.getArticleName();

    String artAuthor = anArt.getUserName();

    String artContent = anArt.getArticleText();

    String artResource = anArt.getArticleResource();

    String writeDate = anArt.getWriteDate();

    SyndEntry entry = new SyndEntryImpl();

    entry.setAuthor(artAuthor);

    __log.debug("set entry's author is:" + artAuthor);

    entry.setTitle(artName);

    __log.debug("set entry's title is:" + artName);

    //get article's link and rss description head information;

    String link = null, headInfo = null;

    if (artType == Consts.GOAL_TYPE) {

      link =

        Constants.APPLICATION_PATH.concat(

          "/disGoalContentAction.do?goalID=" + artID);

      headInfo =

        "\""

          + artAuthor

          + "\" 在:"

          + writeDate

          + " 首先创建了目标:\""

          + artName

          + "\"<p>";

    } else if (artType == Consts.DIARY_TYPE) {

      link =

        Constants.APPLICATION_PATH.concat(

          "/disDiaryContentAction.do?goalID" + artID);

      headInfo =

        "\""

          + artAuthor

          + "\" 于:"

          + writeDate

          + " 在目标:\""

          + parentName

          + "\"下添加了日记:\""

          + artName

          + "\"<p>";

    } else if (

      artType == Consts.ADVICE_TYPE && parentType == Consts.GOAL_TYPE) {

      link =

        Constants.APPLICATION_PATH.concat(

          "/disGoalContentAction.do?goalID" + parentID);

      headInfo =

        "\""

          + artAuthor

          + "\" 于:"

          + writeDate

          + " 在目标:\""

          + parentName

          + "\"下添加了评论:\""

          + artName

          + "\"<p>";

    } else {

      link =

        Constants.APPLICATION_PATH.concat(

          "/disDiaryContentAction.do?goalID" + parentID);

      headInfo =

        "\""

          + artAuthor

          + "\" 于:"

          + writeDate

          + " 在目标:\""

          + parentParentName

          + "\"的日记:\""

          + parentName

          + "\"下添加了评论:\""

          + artName

          + "\"<p>";

    }

    entry.setLink(link);

    __log.debug("set entry's link is:" + link);

    try {

      entry.setPublishedDate(DATE_PARSER.parse(writeDate));

      __log.debug("set entry's publishedDate is:" + writeDate);

    } catch (ParseException e) {

      e.printStackTrace();

    }

    SyndContent description = new SyndContentImpl();

    description.setType("text/plain");

    String value =

      headInfo.concat("文章内容:<br>").concat(artContent).concat(

        "<p>相关资源:<br>" + artResource);

    description.setValue(value);

    __log.debug("set description's value is:" + value);

    entry.setDescription(description);

    List categories = new ArrayList();

    SyndCategory category = new SyndCategoryImpl();

    category.setName(catName);

    __log.debug("set category's name is:" + catName);

    categories.add(category);

    entry.setCategories(categories);

    entries.add(entry);

    __log.debug(

      "add an entry into entriesList.\n*********************************");

  }

}

　　３、

//$ Id: LatestGoalsRSS.java,v 1.0 2006/02/26 20:49:06 dashing_meng Exp $

//Copyright (c) 2004-2005 Http://www.learndiary.com. All Rights Reserved.

//Permission to use, copy, modify, and distribute this software and its

//documentation without fee, and without a written agreement is hereby

//granted, provided that the above copyright notice and this paragraph

//appear in all copies.  This software program and documentation are

//copyrighted by http://www.learndiary.com. The software program and

//documentation are supplied "AS IS", without any accompanying services

//from The LearnDiary. The LearnDiary does not warrant that the operation

//of the program will be uninterrupted or error-free. The end-user

//understands that the program was developed for research purposes and is

//advised not to rely exclusively on the program for any reason.

//IN NO EVENT SHALL HTTP://WWW.LEARNDIARY.COM BE LIABLE TO ANY PARTY FOR

//DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,

//INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS

//DOCUMENTATION, EVEN IF HTTP://WWW.LEARNDIARY.COM HAS BEEN ADVISED OF THE

//POSSIBILITY OF SUCH DAMAGE. HTTP://WWW.LEARNDIARY.COM SPECIFICALLY

//DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

//WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE

//SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND

//HTTP://WWW.LEARNDIARY.COM HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,

//SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package com.learndiary.website.util.rss;

import org.apache.commons.logging.LogFactory;

import com.learndiary.website.Constants;

import com.learndiary.website.Consts;

import com.learndiary.website.dao.TransContext;

import com.learndiary.website.db.ArticleDB;

import com.sun.syndication.feed.synd.SyndFeedImpl;

/**

 * for generating latest goals' rss feed.

 * @author http://www.learndiary.com,LearnDiary Develop Group

 */

public class LatestGoalsRSS extends RSSGenerator {

  public LatestGoalsRSS(String feedType, int entriesNum) {

    this.__log = LogFactory.getFactory().getInstance(this.getClass());

    try {

      RSSGenerator.trans = new TransContext();

      RSSGenerator.myDB = new ArticleDB(trans);

    } catch (Exception e) {

      e.printStackTrace();

    }

    this.feedType = feedType;

    this.entriesNum = entriesNum;

    this.catName = "最新创建的" + entriesNum + "个目标";

  }

  protected void setFeed() throws Exception {

    try {

      this.setEntries("WHERE typeID=1",Consts.ART_WRITE,Consts.DIR_DESC,Consts.HTML_FLAG);

    } catch (Exception e) {

      e.printStackTrace();

    }

    feed = new SyndFeedImpl();

    feed.setFeedType(feedType);

    feed.setTitle("最新创建的" + entriesNum + "个目标");

    feed.setLink(Constants.APPLICATION_PATH.concat("/indexAction.do"));

    feed.setDescription("学习日记里按时间排序的最新创建的" + entriesNum + "个目标。");

    feed.setCopyright(

      "除原作者特别声明外，本站所有帖子以<a rel=\"license\" href=\"http://creativecommons.org/licenses/by/2.0/\" target=\"creativecommons\">Creative Commons License</a>方式授权.");

    feed.setEntries(entries);

  }

}

  他的站点是：https://fatima.dev.java.net/

　　下面是简介，我想从中可以学习到相关的知识：

JavaPress: Java Blogging / Content Management System

This software is a content management system that runs in a Jakarta Tomcat container with AJAX additions.

Because it runs in Java, it provides a good alternative to the many PHP containers out there. From the technology perspective, it has custom category management, and category exclusion like Slashdot, Rome 0.5 API(s) from Sun Microsystems provides RSS 2.0, 1.x, and Atom x.3 feeds as well as auto generating feeds for each category and can generate Podcasts using the tag. It also has automated XML-RPC pinging using Apache's XML-RPC libraries and can ping up to 50 sites with custom categories (i.e. you can ping javablogs.com with only your "Java" category RSS feed if you wish). It also has a complete user management area where users can edit or delete their comments and manage their information, something lacking in other blogging software. It also includes internal messaging and email notification using JavaMail. It has a custom admin section as well to manage all aspects of the code, and can run on MySQL, PostgreSQL, or any XML JDBC interface using connection pooling. It also uses Hibernate for many Java Beans.

The project is delivered in two sections:

PressCore - The EAR file, although it can be simply deployed as classes in the WEB-INF/classes folder, contains all the workhorse code, including the Technorati integration, Hibernate code, Connection Pooling, JNDI, category management and exclusion, rss generation, podcasting manager, xml-rpc pinging (up to 40 sites now, database driven!) and many other neat things.

PressWeb - The WAR file as it were, or simply the content with the JSP tags and example WEB-INF and META-INF that implements all the db pooling, mailing and other features. Should be easy to set up if you use the /install directory after you deploy this WAR in your Tomcat container (WARNING: Delete this install directory before you release in to production!)

External API(s):

Sun Microsystem's Rome 0.6 for RSS / Atom feed generation

Apache XML-RPC libraries for weblog pinging

Sun Microsystem's Java API for XML Processing (JAXP) v1.2.6_01

Sun Microsystem's JavaServer Pages Standard Tag Library (JSTL) v1.1.1_01

Technorati Java API (jTechnorati)