AES加密的gcm模式java实现代码

以下是AES加密的gcm模式java实现代码：

import javax.crypto.Cipher;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.SecureRandom;

public class AESGCMEncryptor {

    private static final int GCM_IV_LENGTH = 12;
    private static final int GCM_TAG_LENGTH = 16;
    private static final String ALGORITHM = "AES/GCM/NoPadding";

    public static byte[] encrypt(byte[] plaintext, byte[] key) throws Exception {
        SecureRandom random = new SecureRandom();
        byte[] iv = new byte[GCM_IV_LENGTH];
        random.nextBytes(iv);

        SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
        GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(GCM_TAG_LENGTH * 8, iv);

        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, gcmParameterSpec);

        byte[] ciphertext = cipher.doFinal(plaintext);

        byte[] result = new byte[iv.length + ciphertext.length];
        System.arraycopy(iv, 0, result, 0, iv.length);
        System.arraycopy(ciphertext, 0, result, iv.length, ciphertext.length);

        return result;
    }
}

希望这个代码能够帮到你！