Environment entries can be added as from the JavaEE 6 spec. For instance:
<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-ear-plugin</artifactId> <version>2.10.1</version> <configuration> [...] <version>6</version> [...] <env-entries> <env-entry> <description>A complete entry.</description> <env-entry-name>complete</env-entry-name> <env-entry-type>java.lang.Integer</env-entry-type> <env-entry-value>4</env-entry-value> </env-entry> <env-entry> <env-entry-name>no-type</env-entry-name> <env-entry-value>4</env-entry-value> </env-entry> <env-entry> <env-entry-name>no-value</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> </env-entry> </env-entries> </configuration> </plugin> </plugins> </build>