java安全架构____读取.cer证书文件的信息

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