暗号化(SHA1)

EncryptUtil.java

    private static final String ALGORITHM_SHA1 = "SHA1";

    private static final String SALT = "saltvalue";

    public static String encode2SHA1Text(String plainText) {
        return encode2SHA1Text(plainText, ALGORITHM_SHA1, SALT);
    }

    public static String encode2SHA1Text(String plainText, String algorithm, String salt) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance(algorithm);

        // salt+plainText
        final String target = String.format("%s%s", salt, plainText);
        md.update(target.getBytes(), 0, target.getBytes().length);

        final byte[] sha1hash = md.digest();

        StringBuilder encodedText = new StringBuilder();
        for (int i = 0; i < sha1hash.length; i++) {
            encodedText.append(String.format("%02x", sha1hash[i]));
        }
        return encodedText.toString();
    }