PlutoistheReferenceImplementationoftheJavaPortletSpecification. ThecurrentversionofthisPortletspecificationisJSR1681.0Portletsaredesignedtoruninthecontextofaportal.TheyarewrittentothePortletAPI. Plutoimplementsthecontract,thePortletAPI,betweenportletsandportals. Plutoisaportletcontainer.
PortletAPI规范（JSR168）的Portlet容器的实现，它为开发者提供了一个运行portlets的工作平台。
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