build.gradle dependencies { implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' implementation('nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect') } /src/main/resources/application.properties spring.thymeleaf.prefix=classpath:templates/ spring.thymeleaf.check-template-location=true spring.thymeleaf.suffix=.html spring.thymeleaf.cache=false layout.html 템플릿을 호출할 곳에서 layout:deco..