现有portal项目(商业的和开源的)解决方案及优缺点

Open source projects 

http://jportlet.sourceforge.net/ 
http://jakarta.apache.org/jetspeed/site/index.html 
完整的文档，但jetspeed没有支持JSR168,jetspeed2还没有release.

http://www.liferay.com/home/index.jsp 
liferay的架构比较混乱，基于它进行二次开发困难

http://basicportal.com/ 
http://www.jahia.org/ 
http://jporta.sourceforge.net/ 

http://jakarta.apache.org/pluto
portlet container


Commercial products 
weblogic portal 8.1
提供的是开发平台，有很多的解决方案http://dev2dev.bea.com.cn/techdoc/wlportal/index.jsp

IBM Websphere Portal - http://www.software.ibm.com/wsdd/zones/portal/ 
Oracle Portal Developer Kit - http://portalstudio.oracle.com/ 

其它: 
PSML - http://jakarta.apache.org/jetspeed/site/psml.html
BEA: Web Logic Portal 4.0 http://www.bea.com/products/weblogic/portal/index.shtml
IBM: WebSphere Portal 2.1 http://www-4.ibm.com/software/webservers/portal/ 
iPlanet: iPlanet Portal Server 3.0 http://www.iplanet.com/products/iplanet_portal/home_portal.html
Oracle: Oracle 9i Portal http://www.oracle.com/ip/deploy/ias/portal/index.html
Apache Software Foundation: Jakarta JetSpeed 1.3
BEA: Web Logic Portal 4.0 http://www.bea.com/products/weblogic/portal/index.shtml
IBM: WebSphere Portal 2.1 http://www-4.ibm.com/software/webservers/portal/ 
iPlanet: iPlanet Portal Server 3.0 http://www.iplanet.com/products/iplanet_portal/home_portal.html
Oracle: Oracle 9i Portal http://www.oracle.com/ip/deploy/ias/portal/index.html
SAP Portal: http://www.iviewstudio.com
Epicentric portal: http://www.epicentric.com/solutions/products/efs/

4.代表网站
http://www.mynetscape.com/index2.psp 
u/p:antstone2004/ants
http://demo.liferay.net/c/portal_public/layout?p_l_id=275.1 
u/p:echo@ants.com.cn / stone
http://www.bluesunrise.com/jetspeed/portal
u/p:stone/stone

5.JSR 168
JSR 168 (Java Portlet) 是一种 Java 规范，其目的是在 portlet 和门户之间建立可移植性关系。这个规范的一个主要目标是为门户和portlet 供应商建立一组 Java API 标准。这些 API 涉及的领域包括表示、聚合、安全性以及 portlet 生命周期。