如何把外部网站上的网页内容截取到Portal上来呢？
包括整页截取和网页部分截取

用provider.xml来设置过滤器
provider.xml文件会用吗：

<?xml version="1.0" encoding="UTF-8"?>
<?providerDefinition version="3.1"?>
<provider class="oracle.portal.provider.v2.http.URLProviderDefinition">
  <providerInstanceClass>oracle.portal.provider.v2.http.URLProviderInstance</providerInstanceClass>
<!--
  <proxyInfo class="oracle.portal.provider.v2.ProxyInformation">
  <httpProxyHost>10.168.201.251</httpProxyHost>
    <httpProxyPort>80</httpProxyPort>
  </proxyInfo>
-->
  <session>true</session>
  <passAllUrlParams>true</passAllUrlParams>
  <authentication class="oracle.portal.provider.v2.security.Authentication">
    <authType>basic</authType>
  </authentication>
  <preferenceStore class="oracle.portal.provider.v2.preference.FilePreferenceStore">
    <name>PrefStore</name>
    <useHashing>true</useHashing>
  </preferenceStore>
  <portlet class="oracle.portal.provider.v2.http.URLPortletDefinition">
    <id>1</id>
    <name>demoURLPortlet</name>
    <title>demo URL Portlet</title>
    <description>Display as a portlet.</description>
    <timeout>30</timeout>
    <timeoutMessage>9iAS timed out</timeoutMessage>
    <acceptContentType>text/html</acceptContentType>
    <renderer class="oracle.portal.provider.v2.render.RenderManager">
      <showPage class="oracle.portal.provider.v2.render.http.URLRenderer">
        <contentType>text/html</contentType>
        <charSet>GBK</charSet>
        <pageUrl>http://ias.com:7777/</pageUrl>
        <filter class="oracle.portal.provider.v2.render.HtmlFilter">
          <inlineRendering>true</inlineRendering>
          <headerTrimTag><BODY</headerTrimTag>
          <footerTrimTag>/BODY></footerTrimTag>
        </filter>
      </showPage>
    </renderer>
  </portlet>
</provider>