<dependency>
  <groupId>javax.portlet</groupId>
  <artifactId>portlet-api</artifactId>
  <version>1.0</version>
</dependency>

implementation 'javax.portlet:portlet-api:1.0'

implementation("javax.portlet:portlet-api:1.0")

libraryDependencies += "javax.portlet" % "portlet-api" % "1.0"

@Grapes(
  @Grab(group='javax.portlet', module='portlet-api', version='1.0')
)

<dependency org="javax.portlet" name="portlet-api" rev="1.0" />

[javax.portlet/portlet-api "1.0"]

'javax.portlet:portlet-api:jar:1.0'