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
