Here is an example of using the HTMLLayout class from the logback-classic library in Java:

import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.html.HTMLLayout;

public class LogbackExample {
    public static void main(String[] args) {
        LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();

        // Create a new HTMLLayout object
        HTMLLayout layout = new HTMLLayout();
        layout.setContext(context);
        layout.setTitle("Logback Example");
        layout.setPattern("%date %level %logger %msg%n");
        layout.start();

        // Create a new FileAppender object
        FileAppender<ILoggingEvent> appender = new FileAppender<ILoggingEvent>();
        appender.setContext(context);
        appender.setFile("logback.html");
        appender.setEncoder(new PatternLayoutEncoder());
        appender.setLayout(layout);
        appender.start();

        Logger logger = (Logger) LoggerFactory.getLogger(LogbackExample.class);
        logger.addAppender(appender);
        logger.debug("This is a debug message");
        logger.info("This is an informational message");
        logger.error("This is an error message", new Exception("This is an exception"));
    }
}

This example uses the HTMLLayout class to format log events as an HTML table.

It creates an instance of HTMLLayout to set the title of the output HTML file and the pattern of the