Spring Boot: SpringBootServletInitializer is deprecated

You can try this - worked for me

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

You are using org.springframework.boot.context.web.SpringBootServletInitializer this is deprecated. Instead:

Use

org.springframework.boot.web.support.SpringBootServletInitializer

For SpringBoot 2.0

org.springframework.boot.web.servlet.support.SpringBootServletInitializer