数字证书公钥相关对象之间的转换

X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(subjectPublicKeyInfo.getEncoded());        KeyFactory keyFactory = KeyFactory.getInstance(\"RSA\");        PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);

subjectPublicKeyInfo.getPublicKeyData().getBytes()

java.security.PublicKeypublicKey

（1.2.840.113549.1.1.1为RSA的oid）AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(new ASN1ObjectIdentifier(\"1.2.840.113549.1.1.1\

byte[]keyData

SubjectPublicKeyInfo.getInstance(publicKey.getEncoded())或new SubjectPublicKeyInfo(ASN1Sequence.getInstance(publicKey.getEncoded())

org.bouncycastle.asn1.x509.SubjectPublicKeyInfosubjectPublicKeyInfo