[FIXED] Get Resource Spring Boot Java

Issue

How to get resource from folder resources/key?

I did like this:

String Key = new String(Files.readAllBytes(Paths.get(ClassLoader.getSystemResource("key/private.pem").toURI())));

And it doesn't work when I build the project into a jar. So I'm looking for another way to do this. Can you please tell me how to get the resource?

    private PublicKey getPublicKey() throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {

        String key = getPublicKeyContent().replaceAll("\\n", "")
                .replace("-----BEGIN PUBLIC KEY-----", "").replace("-----END PUBLIC KEY-----", "");

        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(Base64.getDecoder().decode(key));

        KeyFactory kf = KeyFactory.getInstance("RSA");

        return kf.generatePublic(keySpec);
      }



      private PrivateKey getPrivateKey() throws NoSuchAlgorithmException, InvalidKeySpecException {

        String key = getPrivateKeyContent().replaceAll("\\n", "")
                .replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "");

        PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(Base64.getDecoder().decode(key));

        KeyFactory kf = KeyFactory.getInstance("RSA");

        return kf.generatePrivate(keySpec);
      }

Solution

Try this util method which uses spring framework core and util packages.

    public static String getResourceFileContent(String resourcePath) {
        Objects.requireNonNull(resourcePath);
        ClassPathResource resource = new ClassPathResource(resourcePath);
        try {
            byte[] bytes = FileCopyUtils.copyToByteArray(resource.getInputStream());
            return new String(bytes);
        } catch(IOException ex) {
            log.error("Failed to parse resource file : " + resourcePath, ex);
        }
    }

Answered By - Kashinath
Answer Checked By - Cary Denson (JavaFixing Admin)