给你的网站增加RSS功能

     呵呵,其实RSS很简单.因为他的代码量实在是不大,而且很容易理解,
    我经过反复的筛选和使用,认为使用rome是目前比较简捷而且高效的生成RSS的好工具.而我以前是使用freemarker来生成rss,但是生成的rss不标准,本文主要是实践为主,列举出实际代码.
    首先下载最新的rome版本,[url=https://rome.dev.java.net/source/browse/*checkout*/rome/www/dist//rome-0.9.zip]rome0.9下载地址[/url]
    然后把rome-0.9.jar放在你的web-inf/lib下面.
    开始写代码了>
   

java 代码

public ActionForward RssPut(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        /**
         * 产生二级分类
         */
        String Guangao = "<br>";
        DateFormat DATE_PARSER = new SimpleDateFormat("yyyy-MM-dd");
        // 生成静态页面
        ServletContext servletContext = servlet.getServletContext();
        String realPath = servletContext.getRealPath("/");
        List ProductType1 = productDAO.getProductTreeLayer("0");
        List ProductType2 = productDAO.getProductTreeLayer("1");
        List ProductType3 = productDAO.getProductTreeLayer("2");

        /**
         * 生成首页
         */
        String path = realPath + "AntBeeRss/";

        String fileName = "";
        /**
         * 从这里开始循环，产品名称的ID来
         */
        for (int i = 0; i < ProductType2.size(); i++) {
            Product product = (Product) ProductType2.get(i);
            File newsDir = new File(path);
            if (newsDir.exists()) {
                fileName = path + "/AntBeeRss_"
                        + product.getTypeDir().toString() + ".xml";
            } else {
                newsDir.mkdirs();
                fileName = path + "/AntBeeRss_"
                        + product.getTypeDir().toString() + ".xml";
            }
            SyndFeed feed = new SyndFeedImpl();
            feed.setFeedType("rss_2.0");
            feed.setTitle(product.getSonName() + "大全,报价,功能描述");
            feed.setAuthor("AntBee Tech Corp.");
            feed.setCopyright("Copyright 2007-2008, AntBee Tech Corp.");
            feed.setLink("http://www.1718zx.cn");
            feed.setDescription("AntBee Tech Corp.");
            feed.setEncoding("GBK");//使用GBK,否则zhuaxia和google都不认识。
            feed.setLanguage("GBK");
            List entries = new ArrayList();

            List product2 = productInfoDAO.getProductinfo2(product.getId()
                    .toString());
            if (product2 != null) {
                for (int j = 0; j < product2.size(); j++) {
                    Productinfo info = (Productinfo) product2.get(j);
                    SyndEntry entry;
                    SyndContent description;
                    entry = new SyndEntryImpl();
                    String manufacturer = (info.getManufacturer() == null) ? ""
                            : info.getManufacturer().getManufacturerName();
                    entry.setTitle(info.getProductName() + ",型号："
                            + info.getProductSpec() + ",厂商：" + manufacturer);
                    entry.setLink("http://www.1718zx.cn/Product/"
                            + info.getProductSpec() + ".html");
                    entry.setPublishedDate(new Date());
                    description = new SyndContentImpl();
                    description.setType("text/plain");
                    description.setValue(info.getProductDesc() + Guangao);
                    entry.setDescription(description);
                    entries.add(entry);
                }
            }
            try{
                feed.setEntries(entries);
                Writer writer = new FileWriter(fileName);
                SyndFeedOutput output = new SyndFeedOutput();
                output.output(feed, writer);
                writer.close();
            }catch(Exception e){
                continue;//在很多时候,有些txt文本当中不符合xml的一些规范,而我把它省略过去.
            }

        }
        return "PutOk";
    }

然后在页面上生成如下:(参考了javaeyeRSS订阅)

js 代码

<a href="../AntBeeRss/AntBeeRss_${typeDir?if_exists}.xml"><img src="../AntBeeCMS/images/rss2.gif" alt="RSS订阅此博客" /></a>
   <a href="http://www.zhuaxia.com/add_channel.php?url=http://www.1718zx.cn/AntBeeRss/AntBeeRss_${typeDir?if_exists}.xml"><img src="../AntBeeCMS/images/rss_zhuaxia.gif" alt="用抓虾订阅此博客" /></a>
   <a href="http://fusion.google.com/add?feedurl=http://www.1718zx.cn/AntBeeRss/AntBeeRss_${typeDir?if_exists}.xml"><img src="../AntBeeCMS/images/rss_google.gif" alt="用google订阅此博客" />

呵呵,是不是很简单.