SpittrWebAppInitializer.java

public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] {RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] {WebConfig.class, SwaggerConfig.class};  //설정 클래스를 명시
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] {"/"};  //dispatch servlet mapping
    }
}