base加密解密工具类

public class MLDUtil {
	public static Key DEFAULT_KEY = null;

	public static final String DEFAULT_SECRET_KEY1 = "?:P)(OL><KI*&UJMNHY^%TGBVFR$#EDCXSW@!QAZ";
	public static final String DEFAULT_SECRET_KEY2 = "1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik,9ol.0p;/";
	public static final String DEFAULT_SECRET_KEY3 = "!QAZ@WSX#EDC$RFV%TGB^YHN&UJM*IK<(OL>)P:?";
	public static final String DEFAULT_SECRET_KEY4 = "1qaz@WSX3edc$RFV5tgb^YHN7ujm*IK<9ol.)P:?";
	public static final String DEFAULT_SECRET_KEY5 = "!QAZ2wsx#EDC4rfv%TGB6yhn&UJM8ik,(OL>0p;/";
	public static final String DEFAULT_SECRET_KEY6 = "1qaz2wsx3edc4rfv5tgb^YHN&UJM*IK<(OL>)P:?";
	public static final String DEFAULT_SECRET_KEY = DEFAULT_SECRET_KEY1;

	public static final String DES = "DES";

	public static final Base32 base32 = new Base32();

	static {
		DEFAULT_KEY = obtainKey(DEFAULT_SECRET_KEY);
	}

	/**
	 * 获得key
	 **/
	public static Key obtainKey(String key) {
		if (key == null) {
			return DEFAULT_KEY;
		}
		KeyGenerator generator = null;
		try {
			generator = KeyGenerator.getInstance(DES);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		generator.init(new SecureRandom(key.getBytes()));
		Key key1 = generator.generateKey();
		generator = null;
		return key1;
	}

	/**
	 * 加密<br>
	 * String明文输入,String密文输出
	 */
	public static String encode(String str) {
		return encode64(null, str);
	}

	/**
	 * 加密<br>
	 * String明文输入,String密文输出
	 */
	public static String encode64(String key, String str) {
		return Base64.encodeBase64URLSafeString(obtainEncode(key, str.getBytes()));
	}

	/**
	 * 加密<br>
	 * String明文输入,String密文输出
	 */
	public static String encode32(String key, String str) {
		return base32.encodeAsString(obtainEncode(key, str.getBytes())).replaceAll("=", "");
	}

	/**
	 * 加密<br>
	 * String明文输入,String密文输出
	 */
	public static String encode16(String key, String str) {
		return Hex.encodeHexString(obtainEncode(key, str.getBytes()));
	}

	/**
	 * 解密<br>
	 * 以String密文输入,String明文输出
	 */
	public static String decode(String str) {
		return decode64(null, str);
	}

	/**
	 * 解密<br>
	 * 以String密文输入,String明文输出
	 */
	public static String decode64(String key, String str) {
		return new String(obtainDecode(key, Base64.decodeBase64(str)));
	}

	/**
	 * 解密<br>
	 * 以String密文输入,String明文输出
	 */
	public static String decode32(String key, String str) {
		return new String(obtainDecode(key, base32.decode(str)));
	}

	/**
	 * 解密<br>
	 * 以String密文输入,String明文输出
	 */
	public static String decode16(String key, String str) {
		try {
			return new String(obtainDecode(key, Hex.decodeHex(str.toCharArray())));
		} catch (DecoderException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 加密<br>
	 * 以byte[]明文输入,byte[]密文输出
	 */
	private static byte[] obtainEncode(String key, byte[] str) {
		byte[] byteFina = null;
		Cipher cipher;
		try {
			Key key1 = obtainKey(key);
			cipher = Cipher.getInstance(DES);
			cipher.init(Cipher.ENCRYPT_MODE, key1);
			byteFina = cipher.doFinal(str);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			cipher = null;
		}
		return byteFina;
	}

	/**
	 * 解密<br>
	 * 以byte[]密文输入,以byte[]明文输出
	 */
	private static byte[] obtainDecode(String key, byte[] str) {
		Cipher cipher;
		byte[] byteFina = null;
		try {
			Key key1 = obtainKey(key);
			cipher = Cipher.getInstance(DES);
			cipher.init(Cipher.DECRYPT_MODE, key1);
			byteFina = cipher.doFinal(str);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			cipher = null;
		}
		return byteFina;
	}

	public static byte[] decrypt(byte[] src, byte[] key) throws Exception {
		// DES算法要求有一个可信任的随机数源
		SecureRandom sr = new SecureRandom();
		// 从原始密匙数据创建一个DESKeySpec对象
		DESKeySpec dks = new DESKeySpec(key);
		// 创建一个密匙工厂，然后用它把DESKeySpec对象转换成一个SecretKey对象
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
		SecretKey securekey = keyFactory.generateSecret(dks);
		// Cipher对象实际完成解密操作
		Cipher cipher = Cipher.getInstance(DES);
		// 用密匙初始化Cipher对象
		cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

		// 正式执行解密操作
		return cipher.doFinal(src);
	}

	public final static String decrypt(String data, String key) {
		try {
			// 这里就没走
			return new String(decrypt(String2byte(data.getBytes()), key.getBytes()));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public static byte[] String2byte(byte[] b) {
		if ((b.length % 2) != 0)
			throw new IllegalArgumentException("长度不是偶数");
		byte[] b2 = new byte[b.length / 2];
		for (int n = 0; n < b.length; n += 2) {
			String item = new String(b, n, 2);
			b2[n / 2] = (byte) Integer.parseInt(item, 16);
		}
		return b2;
	}

	public static String DataDecrypt(String str, byte[] key) {
		String decrypt = null;
		try {

			byte[] ret = decrypt(Base64.decodeBase64(str), key);
			decrypt = new String(ret, "UTF-8");
		} catch (Exception e) {
			System.out.print(e);
			decrypt = str;
		}
		return decrypt;

	}

	public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
		// DES算法要求有一个可信任的随机数源
		SecureRandom sr = new SecureRandom();
		// 从原始密匙数据创建DESKeySpec对象
		DESKeySpec dks = new DESKeySpec(key);
		// 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
		SecretKey securekey = keyFactory.generateSecret(dks);
		// Cipher对象实际完成加密操作
		Cipher cipher = Cipher.getInstance(DES);
		// 用密匙初始化Cipher对象
		cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
		// 正式执行加密操作
		return cipher.doFinal(src);
	}

	public final static String encrypt(String password, String key) {
		try {
			return byte2String(encrypt(password.getBytes(), key.getBytes()));
		} catch (Exception e) {
		}
		return null;
	}

	public static String byte2String(byte[] b) {
		String hs = "";
		String stmp = "";
		for (int n = 0; n < b.length; n++) {
			stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
			if (stmp.length() == 1)
				hs = hs + "0" + stmp;
			else
				hs = hs + stmp;
		}
		return hs.toUpperCase();
	}

	public static String DataEncrypt(String str, byte[] key) {

		String encrypt = null;
		try {
			byte[] ret = encrypt(str.getBytes("UTF-8"), key);
			encrypt = new String(Base64.decodeBase64(ret));
		} catch (Exception e) {
			System.out.print(e);
			encrypt = str;
		}
		return encrypt;
	}

	public static void main(String[] args) throws InterruptedException {
		String encrypt = encrypt("dxjkadmin", DEFAULT_SECRET_KEY2);
		System.out.println(encrypt);
		String desencryptString = decrypt("00E64BC6DB5530391EE1B6092E213772", DEFAULT_SECRET_KEY2);
		System.out.println(desencryptString);
	}

}