This little program counts all lines in all files with xlsx extension in a folder. This program assumes that all data is on the first sheet and that all sheets can have a header line which is not considered as a line depending on a boolean (XLS_HAS_HEADER_IN_EACH_SHEET).
FOLDER_TO_CHECK_FOR_FILES -> folder to check for xlsx files (or another extension, but has to be an excel file)
This project uses Quarkus, the Supersonic Subatomic Java Framework.
You can run your application in dev mode that enables live coding using:
./mvn quarkus:dev
The application can be packaged using ./mvnw package.
It produces the xlsx-line-counter-1.0.0-SNAPSHOT-runner.jar file in the /target directory.
Be aware that it’s not an über-jar as the dependencies are copied into the target/lib directory.
The application is now runnable using java -jar target/xlsx-line-counter-1.0.0-SNAPSHOT-runner.jar.
You can create a native executable using: ./mvnw package -Pnative.
Or, if you don't have GraalVM installed, you can run the native executable build in a container using: ./mvnw package -Pnative -Dquarkus.native.container-build=true.
You can then execute your native executable with: ./target/xlsx-line-counter-1.0.0-SNAPSHOT-runner