package?com.thinta.testreadword;







import?android.util.base64;

import?java.security.NoSuchAlgorithmException;
import?java.security.SecureRandom;

import?javax.crypto.Cipher;
import?javax.crypto.KeyGenerator;
import?javax.crypto.SecretKey;
import?javax.crypto.spec.SecretKeySpec;


/*****************************************************
?*?版權信息:?北京振中電子技術有限公司版權所有
?*?創建作者:?郭志文
?*?創建日期:?2018/11/14
?*?****************************************************
?*?更改記錄:?更新人:????更新時間:????更新概要:
?*
?*?****************************************************
?*??類功能說明:AES加解密工具類
?*?****************************************************/
public?class?AESUtils?{
????private?static?final?String?KEY_ALGORITHM?=?“AES“;
????private?static?final?String?DEFAULT_CIPHER_ALGORITHM?=?“AES/ECB/NoPadding“;//默認的加密算法

????/**
?????*?AES?加密操作
?????*
?????*?@param?content?待加密內容
?????*?@param?password?加密密碼
?????*?@return?返回base64轉碼后的加密數據
?????*/
????public?static?String?encrypt（String?content?String?password）?{
????????try?{
????????????Cipher?cipher?=?Cipher.getInstance（DEFAULT_CIPHER_ALGORITHM）;//?創建密碼器
????????????int?blockSize?=?cipher.getBlockSize（）;

????????????byte[]?byteContent?=?content.getBytes（）;

????????????int?plaintextLength?=?byteContent.length;
????????????if（plaintextLength?%?blockSize?!=?0）
????????????{
????????????????plaintextLength?=?plaintextLength?+?（blockSize?-?（plaintextLength?%?blockSize））;
????????????}

????????????byte[]?plaintext?=?new?byte[plaintextLength];
????????????System.arraycopy（byteContent?0?plaintext?0?byteContent.length）;

????????????int?len?=?password.getBytes（）.length;
????????????if（len?%?16?!=?0）
????????????{
????????????????len?=?len?+?（16?-?（len?%?16））;
????????????}

????????????byte[]?newpass?=?new?byte[len];

????????????System.arraycopy（password.getBytes（）?0?newpass?0?password.getBytes（）.length）;

????????????SecretKeySpec?keySpec?=?new?SecretKeySpec（newpass?“AES“）;

????????????cipher.init（Cipher.ENCRYPT_MODE?keySpec）;//?初始化為加密模式的密碼器

????????????byte[]?result?=?cipher.doFinal（plaintext）;//?加密

???????????//?return?base64.encodebase64String（result）;//通過base64轉碼返回
????????????return?base64.encodeToString（resultbase64.DEFAULT）;//通過base64轉碼返回
????????}?catch?（Exception?ex）?{
???????????//?Logger.getLogger（AesDec.class.getName（））.log（Level.SEVERE?null?ex）;
????????}

????????return?null;
????}

????/**
?????*?AES?解密操作
?????*
?????*?@param?content
?????*?@param?password
?????*?@return
?????*/
????public?static?String?decrypt（String?content