AES加密 自定义密钥生成

		//算法
		private static String algorithm="AES";
		//自定义密钥，由uuid生成的32位字符串
		/**
		 * uuid是128位整数 以16进制展现
		 */
		private static String key = UUID.randomUUID().toString().replaceAll("-","");
		/**
		 * 生成密钥
		 * @return
		 * @throws Exception
		 */
		public static Key getKey(String strKey) throws Exception{
				//创建密钥生成器
				KeyGenerator keyGenerator = KeyGenerator.getInstance(algorithm);
				//初始化密钥
				keyGenerator.init(new SecureRandom(strKey.getBytes()));
				//生成密钥
				SecretKey getKey = keyGenerator.generateKey();
		        System.out.println("生成密钥:"+bytesToHexString(getKey.getEncoded ())+"----"+bytesToHexString(getKey.getEncoded ()).length());
		        return getKey;
		}