Spring 启动，tomcat，rest Z8A5DA52ED126447D359E704C05721A8AAZ

Question

I am using Kotlin + Gradle and trying to build a war file to deploy on Tomcat. My application is from the https://start.spring.io plus a simple controller and build the war file using ./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<String> {
        return IntStream.range(0, 10)
            .mapToObj { i: Int -> "Hello number $i" }
            .collect(Collectors.toList())
    }
}

when I try to access it I get

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.

I am super stuck. What am I doing wrong? If I add a html file to the src/main/webapp/index.html it shows up for some reason only the rest api can't be reached.

Answer 1

Spring Boot applications come with a built in Servlet. You are probably already using this feature when launching the application inside your IDE.

This basically means that you can just run your.jar file on any web server and it will be ready to go without setting up an extra tomcat instance.

However, if you want to build a Spring Boot application as a war file and deploy it to an external tomcat, you need to follow some extra steps as explained in this article .

Answer 2

Assuming from what you posted so far: the path that is returned shows another route before your actual controller route "/demo-0.0.1-SNAPSHOT/hello" is this "/demo-0.0.1-SNAPSHOT" the path that your application runs on? If not it should be included in your controller (assuming you havent set it elsewhere for eg in your application.properties). for eg http://localhost:8080/ would be the basepath and either http://localhost:8080/demo-0.0.1-SNAPSHOT/hello or http://localhost:8080/hello would point to your controller. Also your startup logs (for Tomcat and Spring) might give away more about the issue.