Creating a login page using mysql java html and css

I have created the table that contains login details and write the program in java to process the information but i do not know how can I link the frontend file of html to java file

Do you use Spring? Spring boot? JavaEE? I suggest to use Spring Boot.

Spring Boot will automatically add static web resources located within any of the following directories:

/META-INF/resources/
/resources/
/static/
/public/

So you can create a public/ directory under resources/ directory and put your static contents there. And they will be reached by: http://localhost:3000/koo.htm. (assuming the server.port is 3000)

You can customize these directories using spring.resources.static-locations in the application.properties.

You can continue read in https://spring.io/blog/2013/12/19/serving-static-web-content-with-spring-boot