利用RSSLibJ读取RSS .
白宏义
RSS是一个标准的XML文件，Rss阅读器可以读取这个XML文件获得文章的信息，使用户可以通过Rss阅读器而非浏览器阅读Blog，我们只要动态生成这个XML文件便可以了。RSSLibJ是一个专门读取和生成RSS的小巧实用的Java库，大小仅25k，可以下载rsslibj-1_0RC2.jar和它需要的EXMLjar两个文件，然后复制到/WEB-INF/lib/下。
rsslibj-1_0RC2.jar下载地址：
http://sourceforge.net/project/downloading.php?group_id=71153&use_mirror=nchc&filename=rsslibj-1_0RC2.jar&27763931
EXML.jar下载地址：http://rsslibj.cvs.sourceforge.net/rsslibj/rsslibj/lib/EXML.jar?view=log
RSSReader.java:
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@page contentType="text/html;charset=gb18030"%>
<f:view>
<html>
<body>
<h:form>
<h3>RSS Reader</h3>
请输入RSS地址：
<h:inputText value="#{rssReader.rssAddress }" id="rssAddress"
converterMessage="请输入一个正确的Rss地址!" style="width:280px;">
</h:inputText>
<h:commandButton value="提交" action="#{rssReader.readRss }"></h:commandButton>
<br>
<br>
<h:message for="rssAddress" style="color:red;"></h:message>
</h:form>
<br>
<br>
从
<h:outputText value="#{rssReader.rssAddress }"></h:outputText>
获取的内容：
<br>
<h:form>
<h:dataTable value="#{rssReader.items }" var="item" style="font-size:13px;" border="1">
<h:column>
<h:outputText value="#{item.title }"></h:outputText>
</h:column>
<h:column>
<h:outputLink value="#{item.link }">
<h:outputText value="#{item.link }"></h:outputText>
</h:outputLink>
</h:column>
</h:dataTable>
</h:form>
</body>
</html>
</f:view>RSSReader.java:
package com.rss;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Properties;
import com.rsslibj.elements.Channel;
import com.rsslibj.elements.Item;
import com.rsslibj.elements.RSSReader;
import electric.xml.ParseException;
public class RssReader {
private static final String urlString = "http://rss.sina.com.cn/news/marquee/ddt.xml";
private List<Item> items;
private String rssAddress;
private String proxyHost = "paicproxy2";
private String proxyPort = "8080";
public String getRssAddress() {
return this.rssAddress;
}
public void setRssAddress(String rssAddress) {
this.rssAddress = rssAddress;
}
public List<Item> getItems() {
return this.items;
}
/**
* 设置代理
*/
public void setProxy(String proxyHost,String proxyPort) {
// 设置代理
Properties systemSettings = System.getProperties();
systemSettings.put("http.proxyHost", proxyHost);
systemSettings.put("http.proxyPort", proxyPort);
System.setProperties(systemSettings);
}
/**
* 读取RSS。
* @param url
* @throws IOException
* @throws ParseException
*/
public void readRss() throws IOException, ParseException {
setProxy(proxyHost, proxyPort);
URL __url = new URL(this.rssAddress);
HttpURLConnection conn = (HttpURLConnection) __url.openConnection();
InputStream in = conn.getInputStream();
BufferedReader bufReader = new BufferedReader(new InputStreamReader(in,"utf-8"));
RSSReader rssReader = new RSSReader(bufReader);
Channel channel = rssReader.getChannel();
this.items = channel.getItems();
}
/**
* 打印获取的RSS内容。
* @param urlString
*/
public void test(String urlString) {
setProxy(urlString, urlString);
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream is = conn.getInputStream();
StringBuilder sBuilder = new StringBuilder();
String line = null;
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
while ((line = reader.readLine()) != null) {
sBuilder.append(line).append("\n");
}
System.out.println(sBuilder.toString());
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
faces-config.xml:
<?xml version="1.0"?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
"http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>
<managed-bean>
<managed-bean-name>rssReader</managed-bean-name>
<managed-bean-class>
com.rss.RssReader
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
类似资料：