Android 3DES加密

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/** * 3DES加密解密工具类 * Created by 犀利的小牛 on 2016/7/29. */public class DES3Util {    // 密钥    private final static String secretKey = "aaaaaaaaaaaaaaaaaaadaaaaa";    // 向量    private final static String iv = "999929999";    // 加解密统一使用的编码方式    private final static String encoding = "UTF-8";    /**     * 3DES加密并UrL转码     */    public static String encode(String plainText) {        try {            SecretKey deskey = null;            DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");            deskey = keyfactory.generateSecret(spec);            Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");            IvParameterSpec ips = new IvParameterSpec(iv.getBytes());            cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);            byte[] encryptData = cipher.doFinal(plainText.getBytes(encoding));            return URLEncoder.encode(Base64.encode(encryptData), encoding);        } catch (Exception e) {            e.printStackTrace();            return null;        }    }    /**     * UrL解码并3DES解密     */    public static String decode(String encryptText) {     try {            SecretKey deskey = null;            DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");            deskey = keyfactory.generateSecret(spec);            Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");            IvParameterSpec ips = new IvParameterSpec(iv.getBytes());            cipher.init(Cipher.DECRYPT_MODE, deskey, ips);            byte[] decryptData = cipher.doFinal(Base64.decode(URLDecoder.decode(encryptText, encoding)));            return new String(decryptData, encoding);        } catch (Exception e) {            e.printStackTrace();            return null;        }    }}
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