Spring Boot read file from resources

getResourceFileAsString.java

   public String loadFile(final String pathResource) {
    try (final InputStream is = new ClassPathResource(pathResource).getInputStream()) {
     // To be customized
     return IOUtils.toString(is, "UTF-8");
    } catch (final Exception e) {
     final String errorMessage = "Error loading file ";
     // Could be more specific
     throw new RuntimeException(errorMessage + e);
    }
   }

   public String readResource(final String pathResource) {
    try (final InputStream is = new ClassPathResource(pathResource).getInputStream()) {
     return IOUtils.toString(is, "UTF-8");
    } catch (final IOException e) {
     throw new UncheckedIOException(e);
    }
   }

   public String readResourceParallel(final String pathResource) {
    try (final InputStream is = new ClassPathResource(pathResource).getInputStream()) {
     return new BufferedReader(new InputStreamReader(is)).lines()
      .parallel().collect(Collectors.joining("\n"));
    } catch (final IOException e) {
     throw new UncheckedIOException(e);
    }
   }