Is ExcelJConnect standard JDBC driver? How to connect to XLSX in such a tool like SQuirreL SQL Client?

Hello, developers,

may I ask You, if ExcelJConnect is standard JDBC driver? How to connect to XLSX in such a tool like SQuirreL SQL Client or any other Java database GUI tool? I tried to set up ExcelJConnect in SQuirreL SQL Client, but when tried to select any data, I have no luck (message like Unsupported operation appears). JDBC URL is "jdbc:inetexcel:C:\temp\test.xlsx?hasHeaderRow=false", connected without errors, but that is all. No data. I tried SQL SELECT: select * from "Sheet1", but no luck.

Or is ExcelJConnect targeted only for Java code as a component, library as seen in https://github.com/i-net-software/ExcelJConnect Usage chapter?

I am looking for some simple, free, read only XLSX JDBC driver. Well known XLSX drivers are full of capabilities, most of such capabilities not needed by me, but all of such (two) drivers are quite expensive, especially for my purposes.

Thank You for Your answer in advance, Stepan