Java转ASN1可读字符串

import org.bouncycastle.asn1.ASN1OutputStream;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERUTF8String;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class JavaToASN1 {
    public static void main(String[] args) {
        // 定义ASN.1数据结构
        DERInteger number = new DERInteger(123);
        DERUTF8String name = new DERUTF8String("John Doe");
        DERSequence sequence = new DERSequence(new ASN1Encodable[]{number, name});

        // 将Java对象编码为ASN.1格式的字节流
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ASN1OutputStream asn1OutputStream = null;
        try {
            asn1OutputStream = new ASN1OutputStream(outputStream);
            asn1OutputStream.writeObject(sequence);
            asn1OutputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (asn1OutputStream != null) {
                try {
                    asn1OutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        // 将字节流转换为可读字符串
        String asn1String = new String(outputStream.toByteArray());
        System.out.println("ASN.1可读字符串: " + asn1String);
    }
}