I don't see where HTML fits in your question.
If you need to save to database, MySQL road might be the right one.
If you just need to save data, you can read and write it back from a simpler text file, no need for a database: with a small set of data (less than a few MB), just reading it and processing it in memory is faster and simpler than doing SQL requests.

HTML is there because I would need to get the information from a website, where the app is running to the sever then back on the website, but yes MySQL looks like the safest option, are there any Mysql functions in processing? 

There is a library to do database access, check the library page.
I don't understand your need, I fear. Are you accessing data from a site or from a database?