Tiles 3
Plugins
To be able to use Apache Tiles 3 support in IntelliJ IDEA, make sure that the Struts 2 plugin is installed and enabled if you want to use the OGNL support. For more information, see Manage plugins.
Libraries
To get the library files for your Tiles 3 development, use the Apache Tiles Downloads page.
Don't forget to add your libraries to the dependencies of corresponding modules.
Overview of Tiles 3 support
Tiles 3 support in IntelliJ IDEA includes code completion, and syntax and error highlighting for:
Tiles definition files
Expression languages (EL): Unified EL and Object-Graph Navigation Language (OGNL)
Tiles - JSP support tag library