Java中AES加密，解密的工具类，以及MD5加密

/**
 * zhaotengtao
 * AES工具类 20/11/13.
 */
public class AESUtils {

    /**
     * 加密方法
     *
     * @param encData    要加密的数据
     * @param key        加密的**
     * @param tripIv     加密的偏移量
     * @param encodeName 加密的编码
     * @return
     */
    public static String encrypt(String encData, String key, String tripIv, String encodeName) {
        try {
            byte[] raw = key.getBytes(encodeName);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES / CBC / PKCS5Padding");// "算法/模式/补码方式"
            IvParameterSpec iv = new IvParameterSpec(tripIv.getBytes(encodeName));// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
            byte[] encrypted = cipher.doFinal(encData.getBytes(encodeName));
            return Base64.encodeBase64String(encrypted);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 解密方法
     *
     * @param decData    解密的数据
     * @param key        解密的**
     * @param tripIv     解密的偏移量
     * @param encodeName 解密的编码
     * @return
     */
    public static String decrypt(String decData, String key, String tripIv, String encodeName) {
        try {
            byte[] raw = key.getBytes(encodeName);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES / CBC / PKCS5Padding");
            IvParameterSpec iv = new IvParameterSpec(tripIv.getBytes(encodeName));
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
            byte[] encrypted1 = Base64.decodeBase64(decData);
            byte[] original = cipher.doFinal(encrypted1);
            return new String(original, encodeName);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * MD5加密
     *
     * @param str
     * @return
     */
    public static String md5(String str) {
        if (str == null) {
            return null;
        }
        MessageDigest messageDigest = null;
        try {
            messageDigest = java.security.MessageDigest.getInstance("MD5");
            messageDigest.reset();
            messageDigest.update(str.getBytes("utf-8"));
        } catch (NoSuchAlgorithmException e) {
            return str;
        } catch (UnsupportedEncodingException e) {
            return str;
        }
        byte[] byteArray = messageDigest.digest();
        StringBuilder md5StrBuff = new StringBuilder();
        for (int i = 0; i < byteArray.length; i++) {
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
            else
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
        }
        return md5StrBuff.toString();
    }

}

MD5验证网址：https://md5jiami.51240.com

AES加密解密网址：http://tool.chacuo.net/cryptaes