Java AES加密

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class AESUtils {

    private static final String AES_ALGORITHM = "AES/ECB/PKCS5Padding";

    // 获取 cipher
    private static Cipher getCipher(byte[] key, int model) throws Exception {
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
        cipher.init(model, secretKeySpec);
        return cipher;
    }

    // AES加密
    public static String encrypt(byte[] data, byte[] key) throws Exception {
        Cipher cipher = getCipher(key, Cipher.ENCRYPT_MODE);
        return Base64.getEncoder().encodeToString(cipher.doFinal(data));
    }

    // AES解密
    public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
        Cipher cipher = getCipher(key, Cipher.DECRYPT_MODE);
        return cipher.doFinal(Base64.getDecoder().decode(data));
    }

    public static void main(String[] args) throws Exception {
        //这个字符串就是钥匙，必须是个16位的字符串
        String key = "1234567898765432";
        byte[] kb = key.getBytes(StandardCharsets.UTF_8);
        //加密
        String encrypt = encrypt("要加密的内容".getBytes(StandardCharsets.UTF_8), kb);
        System.out.println(encrypt);
        //解密
        byte[] decrypt = decrypt(encrypt.getBytes(StandardCharsets.UTF_8), kb);
        System.out.println(new String(decrypt));
    }
}