Des工具类

public class DesUtil {

    /**
     * 偏移变量，固定占8位字节
     */
    private final static String IV_PARAMETER = "12345678";
    /**
     * 密钥算法
     */
    private static final String ALGORITHM = "DES";
    /**
     * 加密/解密算法-工作模式-填充模式
     */
    private static final String CIPHER_ALGORITHM = "DES/CBC/PKCS5Padding";
    /**
     * 默认编码
     */
    private static final String CHARSET = "utf-8";
    private static String key = "asdf";

    /**
     * 生成key
     *
     * @param key
     * @return
     * @throws Exception
     */
    private static Key generateKey(String key) throws Exception {
        DESKeySpec dks = new DESKeySpec(key.getBytes(CHARSET));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        return keyFactory.generateSecret(dks);
    }


    /**
     * DES加密字符串
     *
     * @param password 加密密码，长度不能够小于8位
     * @param data     待加密字符串
     * @return 加密后内容
     */
    public static String encrypt(String password, String data) {
        if (password == null || password.length()