You can use the same dependency I mentioned in this spring-boot article.

<!-- https://mvnrepository.com/artifact/org.keycloak/keycloak-spring-boot-2-adapter -->
  <dependency>
   <groupId>org.keycloak</groupId>
   <artifactId>keycloak-spring-boot-2-adapter</artifactId>
   <version>7.0.0</version>
  </dependency>  <!-- https://issues.jboss.org/browse/KEYCLOAK-11064 -->
  <dependency>
   <groupId>org.keycloak</groupId>
   <artifactId>keycloak-tomcat7-adapter-dist</artifactId>
   <version>7.0.0</version>
   <type>pom</type>
  </dependency>