Java Spring Boot: How to map my app root (“/”) to index.html?

Question

I'm new to Java and to Spring. How can I map my app root http://localhost:8080/ to a static index.html? If I navigate to http://localhost:8080/index.html its works fine.

My app structure is :

My configWebConfig.java looks like this:

@Configuration
@EnableWebMvc
@ComponentScan
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations("/");
        }
}

I tried to add registry.addResourceHandler("/").addResourceLocations("/index.html"); but it fails.

Answer 1

It would have worked out of the box if you hadn't used @EnableWebMvc annotation. When you do that you switch off all the things that Spring Boot does for you in WebMvcAutoConfiguration. You could remove that annotation, or you could add back the view controller that you switched off:

@Override
public void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/").setViewName("forward:/index.html");
}