我正在使用kotlin+gradle并尝试构建一个war文件来部署在tomcat上。我的申请来自https://start.spring.io plus 一个简单的控制器，并使用 ./gradlew bootWar ```
@SpringBootApplication
class ServletInitializer : SpringBootServletInitializer() {

override fun configure(application: SpringApplicationBuilder): SpringApplicationBuilder {
    return application.sources(DemoApplication::class.java)
}

}

@RestController
class TomcatController {
@GetMapping("/hello")
fun sayHello(): Collection {
return IntStream.range(0, 10)
.mapToObj { i: Int -> "Hello number $i" }
.collect(Collectors.toList())
}
}

当我尝试访问它时

Type Status Report

Message The requested resource [/demo-0.0.1-SNAPSHOT/hello] is not available

Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.

我被卡住了。我做错什么了？如果我添加一个html文件到 `src/main/webapp/index.html` 由于某种原因，只有restapi无法访问。