Handling the Trailing Slash in URL

For now, if you use @RequestMapping, @GetMapping, @PostMapping, … you will see that if you accidentally added a trailing slash “/” in the URL, you will get a 404 HTTP error.

To handling this problem, we need to add a path matching configurer.

1. Write a WebConfiguration class with @Configuration annotation that implements WebMvcConfigurer.
2. @Override that method public void configurePathMatch(PathMatchConfigurer configurer){…}
3. The method looks like:

   @Override
   public void configurePathMatch(PathMatchConfigurer configurer){
      configurer.setUseTrailingSlashMatch(true);
   }

To manipulate the URL, you can chain this configurer with setPathHelper(…), or setUrlPathHelper(…) with your own implementation of PathMatcher or UrlPathHelper.