Spring Boot + WebFlux. How to display a simple index.jsp? - spring-boot

Question

Am trying to use spring webflux in a spring boot application to try to display a simple jsp page. For the life of me, am not able to make it work. It's not able to find the "view". It works fine if I use Spring webmvc instead.
Here's the simple setup:
pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
Here's the controller:
#Controller
public class WebController
{
#RequestMapping(value = { "/", "/index" }, headers = "Accept=text/html", method = RequestMethod.GET, produces = "text/html")
public Mono<String> index() {
return Mono.just ("index");
}
}
application.properties:
(Though I doubt this may not work with webflux)
spring.mvc.view.prefix=/jsp/
spring.mvc.view.suffix=.jsp
Folder structure:
Here's the folder structure where index.jsp is (I know index.jsp is in lots of places only because I was trying to see where I need to put it to make it work):
Finally here's the error I get when I try to load: https://localhost:8443/
(Partial stack)
java.lang.IllegalStateException: Could not resolve view with name 'index'. java.lang.IllegalStateException: Could not resolve view with name 'index'.
at org.springframework.web.reactive.result.view.ViewResolutionResultHandler.lambda$resolveViews$3(ViewResolutionResultHandler.java:278)
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ Handler com.xxxxxxx.xxxxxxx.controller.WebController#index() [DispatcherHandler]
Stack trace:
at org.springframework.web.reactive.result.view.ViewResolutionResultHandler.lambda$resolveViews$3(ViewResolutionResultHandler.java:278)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1755)
at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:121)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:359)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onComplete(FluxConcatMap.java:268)
at reactor.core.publisher.Operators.complete(Operators.java:135)
What do I need to do to show a simple jsp page? Embedded server is Tomcat and deployed as jar file in spring boot.
Note: Displaying static files work. So this url works just fine: https://localhost:8443/js/test.js