在Java中加载DSA公钥

import java.io.FileInputStream;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;

public class DSAKeyLoader {
    public static void main(String[] args) throws Exception {
        // 1. 读取DSA公钥文件
        FileInputStream fis = new FileInputStream("dsa_public_key.der");
        byte[] publicKeyBytes = new byte[fis.available()];
        fis.read(publicKeyBytes);
        fis.close();

        // 2. 创建密钥规范对象
        X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);

        // 3. 创建密钥工厂对象并加载公钥
        KeyFactory keyFactory = KeyFactory.getInstance("DSA");
        PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);

        // 打印加载的公钥信息
        System.out.println("Loaded DSA Public Key:");
        System.out.println(publicKey);
    }
}