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import java.io.FileInputStream;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;/*** @author God* 随便找一个.cer文件读取即可*/
public class CertUtil {/*** @author God* @cerPath Java读取Cer证书信息* @throws Exception * @return X509Cer对象*/public static X509Certificate getX509CerCate(String cerPath) throws Exception {X509Certificate x509Certificate = null;CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");FileInputStream fileInputStream = new FileInputStream(cerPath);x509Certificate = (X509Certificate) certificateFactory.generateCertificate(fileInputStream);fileInputStream.close();System.out.println("读取Cer证书信息...");System.out.println("x509Certificate_SerialNumber_序列号___:"+x509Certificate.getSerialNumber());System.out.println("x509Certificate_getIssuerDN_发布方标识名___:"+x509Certificate.getIssuerDN()); System.out.println("x509Certificate_getSubjectDN_主体标识___:"+x509Certificate.getSubjectDN());System.out.println("x509Certificate_getSigAlgOID_证书算法OID字符串___:"+x509Certificate.getSigAlgOID());System.out.println("x509Certificate_getNotBefore_证书有效期___:"+x509Certificate.getNotAfter());System.out.println("x509Certificate_getSigAlgName_签名算法___:"+x509Certificate.getSigAlgName());System.out.println("x509Certificate_getVersion_版本号___:"+x509Certificate.getVersion());System.out.println("x509Certificate_getPublicKey_公钥___:"+x509Certificate.getPublicKey());return x509Certificate;}public static void main(String[] args) throws Exception {getX509CerCate("F:\\test\\test.cer");}
}
//运行结果
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