DSC加密算法，java运用

DSC加密算法，java运用

public static void main(String args[]) {
		String str = "测试内容";
		//加密参数长度大于8
		String sign = "123456789";
		byte[] result = DscData.encrypt(str.getBytes(),sign);
		System.out.println("加密后："+new String(result));
		//直接将如上内容解密
		try {
			byte[] decryResult = DscData.decrypt(result, sign);
			System.out.println("解密后："+new String(decryResult));
		} catch (Exception e1) {
			e1.printStackTrace();
		}
	}
	/**
	 * 加密
	 * @param datasource byte[]
	 * @param sign String
	 * @return byte[]
	 */
	public static  byte[] encrypt(byte[] datasource, String sign) {
		try{
			SecureRandom random = new SecureRandom();
			DESKeySpec desKey = new DESKeySpec(sign.getBytes());
			//创建一个密匙工厂，然后用它把DESKeySpec转换成
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
			SecretKey securekey = keyFactory.generateSecret(desKey);
			//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, random);
			//现在，获取数据并加密
			//正式执行加密操作
			return cipher.doFinal(datasource);
		}catch(Throwable e){
			e.printStackTrace();
		}
		return null;
	}
	/**
	 * 解密
	 * @param src byte[]
	 * @param sign String
	 * @return byte[]
	 * @throws Exception
	 */
	public static byte[] decrypt(byte[] src, String sign) throws Exception {
		// DES算法要求有一个可信任的随机数源
		SecureRandom random = new SecureRandom();
		// 创建一个DESKeySpec对象
		DESKeySpec desKey = new DESKeySpec(sign.getBytes());
		// 创建一个密匙工厂
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		// 将DESKeySpec对象转换成SecretKey对象
		SecretKey securekey = keyFactory.generateSecret(desKey);
		// 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, random);
		// 真正开始解密操作
		return cipher.doFinal(src);
	}

执行main方法