基于Java解析国密数字证书的操作方法

CertificateFactory cf = CertificateFactory.getInstance("X509");
String filePath ="C:\\Users\\example\\Desktop\\ca.crt";
FileInputStream in =new FileInputStream(filePath);
X509Certificate cer = (X509Certificate) cf.generateCertificate(in);

java.security.cert.CertificateParsingException: java.io.IOException: Unknown named curve: 1.2.156.10197.1.301

<dependency>
		<groupId>org.bouncycastle</groupId>
		<artifactId>bcprov-jdk15on</artifactId>
		<version>1.62</version>
</dependency>

// 引入BC库
Security.addProvider(new BouncyCastleProvider());
// 使用BC解析X.509证书
CertificateFactory cf = CertificateFactory.getInstance("X509", "BC");

import org.bouncycastle.jce.provider.BouncyCastleProvider;  
import java.security.Security;  
import java.security.cert.CertificateFactory;  
import java.security.cert.X509Certificate;  
import java.io.FileInputStream;  
public class SMCertificateParser {  
    public static void main(String[] args) {  
        try {  
            // 注册BouncyCastle提供者  
            Security.addProvider(new BouncyCastleProvider());  
            // 使用BouncyCastle提供者解析X.509证书  
            CertificateFactory cf = CertificateFactory.getInstance("X509", "BC");  
            String filePath = "C:\\Users\\example\\Desktop\\ca.crt";  
            FileInputStream in = new FileInputStream(filePath);  
            X509Certificate cer = (X509Certificate) cf.generateCertificate(in);  
            // 打印证书信息  
            System.out.println("版本号：" + cer.getVersion());  
            System.out.println("序列号：" + cer.getSerialNumber().toString());  
            System.out.println("有效期：from：" + cer.getNotBefore() + "  to: " + cer.getNotAfter());  
            System.out.println("签发算法：" + cer.getSigAlgName());  
            System.out.println("签发算法ID：" + cer.getSigAlgOID());  
            in.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
}