Although the exact contents vary by release, version 3.5.3 of the extensions typically includes:
For JasperReports Server versions , you must manually add this JAR to enable PL/SQL execution. jasperreports-extensions-3.5.3.jar download
The jasperreports-extensions-3.5.3.jar file is no longer available on the official JasperReports website, as it is an older version. However, you can try searching for it on other reliable sources: Although the exact contents vary by release, version 3