User Story

As an application developer, I want to run keikai on Java 16.

Acceptance Criteria

Don't cause " Illegal reflective access " warning.

Details

• Currently, there is a reflect call:
  1. add JVM option
  --illegal-access=warn
  2. Export a book to xlsx

WARNING: Illegal reflective access by org.zkoss.poi.util.SAXHelper (file:/Users/hawk/.m2/repository/io/keikai/keikai-poi/5.10.0/keikai-poi-5.10.0.jar) to method com.sun.org.apache.xerces.internal.util.SecurityManager.setEntityExpansionLimit(int)

• In Java 16, the –illegal-access=deny becomes the default mode. Since Java 17, the –illegal-access option is entirely removed.