请提供一段基于java进行SM1加密的main方法

好的，以下是一个基于Java进行SM1加密的示例main方法：

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.engines.SM1Engine;
import org.bouncycastle.crypto.generators.SM2KeyPairGenerator;
import org.bouncycastle.crypto.params.KeyGenerationParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.params.SM2KeyGenerationParameters;
import org.bouncycastle.crypto.params.SM2PrivateKeyParameters;
import org.bouncycastle.crypto.params.SM2PublicKeyParameters;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;

import javax.crypto.Cipher;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.Security;

public class SM1EncryptExample {
    public static void main(String[] args) throws Exception {
        Security.addProvider(new BouncyCastleProvider());

        // 生成SM2密钥对
        SM2KeyPairGenerator gen = new SM2KeyPairGenerator();
        KeyGenerationParameters kgp = new SM2KeyGenerationParameters();
        gen.init(kgp);
        KeyPair kp = gen.generateKeyPair();
        SM2PrivateKeyParameters privateKey = (SM2PrivateKeyParameters) kp.getPrivate();
        SM2PublicKeyParameters publicKey = (SM2PublicKeyParameters) kp.getPublic();

        // 明文
        String plaintext = "Hello, World!";

        // SM1加密
        SM1Engine engine = new SM1Engine();
        engine.init(true, new ParametersWithRandom(publicKey));
        byte[] ciphertext = engine.processBlock(plaintext.getBytes(), 0, plaintext.getBytes().length);

        System.out.println("明文： " + plaintext);
        System.out.println("密文： " + Hex.toHexString(ciphertext));
    }
}

在这个示例中，我们使用了Bouncy Castle库来实现SM1加密算法。首先，我们生成了一个SM2密钥对，并使用公钥进行加密操作。具体来说，我们创建了一个SM1Engine实例，并使用公钥进行初始化，然后调用processBlock方法进行加密操作。最后，我们将密文以十六进制字符串的形式输出。