java - 未从 AttributeConverter 内的属性获取值

Question

我已经创建了一个转换器，并希望从属性文件中获取 secretKey。

@Converter
public class CryptoConverter implements AttributeConverter<String, String> {

    private static final String ALGORITHM = "AES/ECB/PKCS5Padding";
    private byte[] secretKey;

    public CryptoConverter(@Value("${access_token_encryption_key}") String encryptionKey) {
        secretKey = encryptionKey.getBytes();
    }

    @Override
    public String convertToDatabaseColumn(String ccNumber) {
        // do some encryption
        Key key = new SecretKeySpec(secretKey, "AES");
        try {
            Cipher c = Cipher.getInstance(ALGORITHM);
            c.init(Cipher.ENCRYPT_MODE, key);
            return Base64.encodeBytes(c.doFinal(ccNumber.getBytes()));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public String convertToEntityAttribute(String dbData) {
        // do some decryption
        Key key = new SecretKeySpec(secretKey, "AES");
        try {
            Cipher c = Cipher.getInstance(ALGORITHM);
            c.init(Cipher.DECRYPT_MODE, key);
            return new String(c.doFinal(Base64.decode(dbData)));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

我已在 application.properties 文件中添加了 access_token_encryption_key key ，但无法获取该 key access_token_encryption_key 的值。

我认为这个转换器在 spring beans 之前加载。有什么想法可以解决这个问题吗？

谢谢。

Answer 1

转换器不受 Spring 管理。

添加@Component注解使其成为Spring Bean:

@Component
@Converter
public class CryptoConverter implements AttributeConverter<String, String> {