SpringBoot Accessing H2 console

Remove all you have in your properties file. All of those you mentioned are default. Spring-boot will configure it any way as soon as it identifies h2 dependency in your pom. And also you don't need that ServletRegistration bean. Remove that as well. Just put this in your properties file spring.h2.console.enabled=true.

By default console can be accessed on http://localhost:8080/h2-console, default path is h2-console. You can configure it using spring.h2.console.path property.

We only need below configuration in application.properties file:

spring.h2.console.enabled=true

By default h2 will be available at http://localhost:8080/h2-console/

But one can define spring.h2.console.path=/h2 in application.properties and after that h2 can be accessed using http://localhost:8080/h2.

Now if you have implemented SecurityConfig in application then you will need to add

// Make H2-Console non-secured; for debug purposes
.and().csrf().ignoringAntMatchers("/h2/**")
// Allow pages to be loaded in frames from
// the same origin; needed for H2-Console
.and().headers().frameOptions().sameOrigin()

in http.authorizeRequests()