package?com.larcloud.sdk.encrypt;

import?org.apache.commons.codec.binary.base64;

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

/**
?*?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）;

????????????//?生成加密秘鑰
????????????SecretKeySpec?keySpec?=?getSecretKey（password）;

????????????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
????????}?catch?（Exception?ex）?{
????????????ex.p