JAVA Encrypter 加密算法

/**
 * 加密者
 * 
 * @time: 2007-8-29 下午05:45:36
 */
public final class Encrypter {
    private static Cipher       ecipher;

    private static Cipher       dcipher;

    // 必须24个字符
    private static final String key = "*:@1$7!a*:@1$7!a*:@1$7!^";

    private static final String alg = "DESede";

    static {
        try {

            SecretKey skey = new SecretKeySpec(key.getBytes(), alg);

            ecipher = Cipher.getInstance(alg);
            dcipher = Cipher.getInstance(alg);
            ecipher.init(Cipher.ENCRYPT_MODE, skey);
            dcipher.init(Cipher.DECRYPT_MODE, skey);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 加密字符串
     * 
     * @param str
     * @return
     */
    public static String encrypt(String str) {
        if (str == null)
            return "";
        try {
            // Encode the string into bytes using utf-8
            byte[] utf8 = str.getBytes("UTF8");

            // Encrypt
            byte[] enc = ecipher.doFinal(utf8);

            // Encode bytes to base64 to get a string
            return Base64Support.toUrlStr(enc);
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }

    }

    /**
     * 解密字符串
     * 
     * @param str
     * @return
     */
    public static String decrypt(String str) {
        if (str == null)
            return "";
        try {
            // Decode base64 to get bytes
            byte[] dec = Base64Support.fromUrlStr(str);

            // Decrypt
            byte[] utf8 = dcipher.doFinal(dec);

            // Decode using utf-8
            return new String(utf8, "UTF8");
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }

    }
    public static void main(String[] args) {
    	System.out.println(encrypt("google"));
    }

}