关于AES的使用

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private static String charset = "UTF-8";private static final String KEY_ALGORITHM = "AES/ECB/PKCS5Padding";private static final String AES = "AES";private static final byte[] KEY_BYTE_ARR = { (byte) 0x1d, (byte) 0x51, (byte) 0xa7, (byte) 0xc5, (byte) 0x27, (byte) 0x3b,(byte) 0x39, (byte) 0xe0, (byte) 0xfa, (byte) 0x72, (byte) 0xd0, (byte) 0x29, (byte) 0x83, (byte) 0x65,(byte) 0x9d, (byte) 0x74 };/** * AES加密 * @param encryptContent 加密文本 * @param key 密钥 * @return 返回经过base64编码的文本 */public static String encrypt(String encryptContent, String key) {try {Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(editKey(key), AES));byte[] bytes = cipher.doFinal(encryptContent.getBytes(charset));return Base64.encodeBase64String(bytes);} catch(Exception e) {e.printStackTrace();return null;}}/** * AES解密 * @param decryptContent Base64 编码的密文 * @param key 密钥 * @return 返回原文文本 */public static String decrypt(String decryptContent,String key) {try {Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(editKey(key),AES));byte[] bytes = Base64.decodeBase64(decryptContent);bytes = cipher.doFinal(bytes);return new String(bytes, charset);} catch(Exception e) {e.printStackTrace();return null;}}/** * 用于填充key填补出现的异常 * @param key * @return */private static byte[] editKey(String key) {byte[] key64 = key.getBytes();byte[] buff = new byte[KEY_BYTE_ARR.length];if (key64.length < KEY_BYTE_ARR.length) {for (int i = 0; i < KEY_BYTE_ARR.length; i++) {if (key64.length - 1 >= i) {buff[i] = key64[i];}else{buff[i] = KEY_BYTE_ARR[i];}}}return buff;}
直接记录下来以便下次使用
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