java实现aes加解密

以下是Java实现AES加解密的示例代码：

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class AESUtil {

    private static final String ALGORITHM = "AES/CBC/PKCS5Padding";
    private static final String CHARSET = "UTF-8";

    /**
     * AES加密
     *
     * @param data 待加密的数据
     * @param key  密钥
     * @param iv   向量
     * @return 加密后的数据
     * @throws Exception
     */
    public static String encrypt(String data, String key, String iv) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(CHARSET), "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes(CHARSET));
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivSpec);
        byte[] encrypted = cipher.doFinal(data.getBytes(CHARSET));
        return Base64.getEncoder().encodeToString(encrypted);
    }

    /**
     * AES解密
     *
     * @param data 待解密的数据
     * @param key  密钥
     * @param iv   向量
     * @return 解密后的数据
     * @throws Exception
     */
    public static String decrypt(String data, String key, String iv) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(CHARSET), "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes(CHARSET));
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, ivSpec);
        byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(data));
        return new String(decrypted, CHARSET);
    }
}

使用示例：

public class Test {
    public static void main(String[] args) throws Exception {
        String data = "Hello, world!";
        String key = "0123456789abcdef";
        String iv = "0123456789abcdef";
        String encrypted = AESUtil.encrypt(data, key, iv);
        String decrypted = AESUtil.decrypt(encrypted, key, iv);
        System.out.println("加密前的数据：" + data);
        System.out.println("加密后的数据：" + encrypted);
        System.out.println("解密后的数据：" + decrypted);
    }
}