The official source for the IBM i Access ODBC driver is the IBM i Access Client Solutions download page .
You must have a registered IBM ID to access the downloads. download client access odbc driver
The ODBC driver is not in the base Java package but is included in platform-specific Application Packages . The official source for the IBM i Access
Look for the ACS Windows App Pkg English (64bit) . which provide an unixODBC-compatible driver.
These are generally found via the IBM Entitled Systems Support (ESS) website or requested through an IBM Business Partner. Installation Steps (Windows) IBM i Access ODBC Installation
Download the respective Linux Application Package or macOS Application Package , which provide an unixODBC-compatible driver.