Spring 5 static resource mapping

Question

I'm migrating to spring 5. I'm moving all my xml to java config, but I'm stuck on the static resources.

In my old xml config I have resources defined as such: <mvc:resources mapping="/3rdparty/**" location="/3rdparty/" />

Im adding them to my Java Config class

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.mypackages.*")
public class WebConfig implements WebMvcConfigurer {


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {

        registry.addResourceHandler("/3rdparty/**").addResourceLocations("/3rdparty/");


    }

     @Bean
       public ViewResolver viewResolver() {
          InternalResourceViewResolver bean = new InternalResourceViewResolver();

          bean.setPrefix("/");
          bean.setSuffix(".jsp");

          return bean;
       }



}

Now I'm getting these errors for my resources No mapping for GET /myapp/gui/3rdparty/bootstrap-3.3.6-dist/js/bootstrap.min.js

It all worked well with the xml config.. Any ideas how I should define the pattern..

The folder structure is like this

ROOT
 |_WEB-INF
 |_META-INF
 |_gui
   |_3rdparty

I've also moved my startup to java config

public class AppInitializer implements WebApplicationInitializer{

     @Override
        public void onStartup(ServletContext container) {

             AnnotationConfigWebApplicationContext context  = new AnnotationConfigWebApplicationContext();
             context.setConfigLocation("com.mypackages.config");

             container.addListener(new ContextLoaderListener(context));


            ServletRegistration.Dynamic dispatcher = container
              .addServlet("dispatcher", new DispatcherServlet(context));

            dispatcher.setLoadOnStartup(1);
            dispatcher.addMapping("/");
        }
}

Thanks in advance for any help

Answer 1

Two things I suggest to change:

1. Use AnnotationConfigWebApplicationContext#scan("com.mypackages.config") instead of #setConfigLocation(...) in order to scan classes annotated with @Configuration. Or register a specific class directly: #register(WebConfig.class).
2. Double check the argument in #addResourceLocations("/3rdparty/"). Your folder structure indicates that #addResourceLocations("/gui/3rdparty/") might work.

In Maven projects packaged as .war, all web resources are typically in a separated webapp folder, see Maven War Plugin for reference. In your case:

|-- pom.xml
|-- src
    |-- main
        |-- java
        |   |-- com
        |       |-- mypackages
        |           |-- config
        |               |-- WebConfig.java
        |               |-- AppInitializer.java
        |-- resources
        |-- webapp
            |-- gui
                |-- 3rdparty
                    |-- bootstrap.min.js

With WebConfig.java

@ComponentScan(basePackages = "com.stackoverflow.*")
@Configuration 
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {

     @Override 
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/gui/3rdparty/**").addResourceLocations("/gui/3rdparty/");
     }
}

And AppInitializer.java:

public class AppInitializer implements WebApplicationInitializer {

    @Override 
    public void onStartup(ServletContext container) throws ServletException {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.register(WebConfig.class);

        container.addListener(new ContextLoaderListener(context));
        ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(context));

        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
}

}

The bootstrap resource will be available at http://<host>:<port>/gui/3rdparty/bootstrap.min.js