使用Grails和Rome产生Rss

Grails本身好像并没有产生rss的插件。如果要用grails产生Rss，可以使用Rome。方法大概如下：

下载需要的库文件

到https://rome.dev.java.net/下载Rome，之后把rome-xxx.jar放到你的grails项目的lib目录下。这里xxx是版本号。比如我的是rome-1.0RC1.jar

再到http://www.jdom.org/下载JDom。之后同样是把jdom.jar放到lib目录下。

书写代码

创建一个controller，当然你也可以在你已经有的controller里面增加相应方法。这里我们创建一个叫做FeedController的类。

 

import com.sun.syndication.feed.synd.*;
import com.sun.syndication.io.SyndFeedOutput;

class FeedController {

    def supportedFormats = [ "rss_0.90", "rss_0.91", "rss_0.92", "rss_0.93", "rss_0.94", "rss_1.0", "rss_2.0", "atom_0.3"]




    def rss = {

            render(text: getFeed("rss_1.0"), contentType:"text/xml", encoding:"UTF-8")

    }

    def atom = {

            render(text: getFeed("atom_1.0"), contentType:"text/xml", encoding:"UTF-8")

    }

    // or specify your own feed type
    def all = {
            def format = params.id
            if (supportedFormats.contains(format)) {
                render(text: getFeed(format), contentType:"text/xml", encoding:"UTF-8")
            } else {
                response.sendError(response.SC_FORBIDDEN);
            }
    }


    def getFeed(feedType) {

        def items = Post.list(max: 5, sort: "created", order: "desc")

        def entries = []
        items.each { item ->
            def desc = new SyndContentImpl(type: "text/plain", value: item.description);
            def entry = new SyndEntryImpl(title: item.name + " - " + item.summary,
                    link: 'http://www.ondev.net/item/show/' + item.name,
                    publishedDate: item.created, description: desc);
            entries.add(entry);

        }
        SyndFeed feed = new SyndFeedImpl(feedType: feedType, title: '标题',
                link: 'http://www.ondev.net', description: '说明性文字',
                entries: entries);

        StringWriter writer = new StringWriter();
        SyndFeedOutput output = new SyndFeedOutput();
        output.output(feed,writer);
        writer.close();

        return writer.toString();


    }

}

 

之后访问相应的页面，比如说http://www.ondev.net/feed/rss就可以了

转自：http://www.ondev.net/story/show/75;jsessionid=F309C69F29088C3FF0C1DFFAA7255AF5