// write it on application.properties

spring.h2.console.enabled=true

package com.howtodoinjava.demo.config;

import org.h2.server.web.WebServlet;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@SuppressWarnings({"rawtypes","unchecked"})

@Configuration

public class WebConfig {

  @Bean

    ServletRegistrationBean h2servletRegistration(){

    ServletRegistrationBean registrationBean = new ServletRegistrationBean( new WebServlet());

        registrationBean.addUrlMappings("/console/*");

        return registrationBean;

    }

}