http://www.aygfsteel.com/martinx/archive/2005/09/29/14386.html

昨天早晨在刷牙的時候，想了下怎么提高軟件模塊復用度，拿起牙刷，突然想到，牙刷也可以有可以復用的部分，就是牙刷的手柄。想想，要是這個可以重復利用那么全國會節(jié)省多少塑料阿？！平均每月一根，13億人口。。。。牙刷的手柄前段改成羅紋，牙刷頭可以更換，以后去商店只要買牙刷頭，這樣還節(jié)約了成本，哈哈！

portlets can be deployed to OracleAS Portal through three
provider types: Web providers, WSRP providers, and database providers. Web
providers are deployed to a J2EE application server, which is often remote and
communicates with OracleAS Portal through Simple Object Access Protocol (SOAP)
over HTTP. Web Services for Remote Portlets (WSRP), an OASIS standard, is
supported in the Developer’s Preview of OracleAS Portal. Database providers are
Data source What you need to know about the data source
Spreadsheet The URL that points to the spreadsheet containing the data that
you want to display in the portlet.
SQL The connection information to the data source and the SQL
query that retrieves the data from the database.
XML The location of the XML source and optionally the address of
the XSL filter and the XML schema.
Web service The WSDL URL, the method of the Web service, and optionally
the XSL filter URL and the XML schema URL.
Web page The Web page data source uses the same environment as Web
Clipping. No technical background is required.
J2EE Connector
Architecture
Although not displayed on the Type page of the OmniPortlet
wizard, a J2EEtm Connector Architecture (JCA) 1.0 adapter is
also available. JCA provides a mechanism to store and retrieve
enterprise data such as that held in ERP systems (Oracle
Financials, SAP, PeopleSoft, and so on).
Deployment Type
Portlet Technologies Matrix 2-7
implemented in PL/SQL and deployed in the Oracle database where OracleAS Portal
is installed.

今天通過注冊，哈哈，開張大吉！