How to extract CN from X509Certificate in Java?
问题 I am using a SslServerSocket and client certificates and want to extract the CN from the SubjectDN from the client\'s X509Certificate . At the moment I call cert.getSubjectX500Principal().getName() but this of course gives me the total formatted DN of the client. For some reason I am just interested in the CN=theclient part of the DN. Is there a way to extract this part of the DN without parsing the String myself? 回答1: Here's some code for the new non-deprecated BouncyCastle API. You'll need