Java Utils工具类--AES加密解密

/**
 * @version V1.0
 * @desc AES 加密工具类
 */
public class AesUtil {
    
    
    private static final String KEY_ALGORITHM = "AES";
    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法
    /**
     * AES 加密操作
     *
     * @param content 待加密内容
     * @param password 加密密码
     * @return 加密后的字节
     */
    public static byte[] encrypt(String content, String password) {
    
    
        try {
    
    
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(password));// 初始化为加密模式的密码器
            byte[] result = cipher.doFinal(byteContent);// 加密
            return result;
        } catch (Exception ex) {
    
    
            Logger.getLogger(AesUtil.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;
    }
    /**
     * AES 解密操作
     *
     * @param bin
     * @param password
     * @return 解密后的字节
     */
    public static byte[] decrypt(byte[] bin, String password) {
    
    
        try {
    
    
            //实例化
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
            //使用密钥初始化，设置为解密模式
            cipher.init(Cipher.DECRYPT_MODE, getSecretKey(password));
            //执行操作
            byte[] result = cipher.doFinal(bin);
            return result;
        } catch (Exception ex) {
    
    
            Logger.getLogger(AesUtil.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;
    }
    /**
     * 生成加密秘钥
     *
     * @return
     */
    private static SecretKeySpec getSecretKey(final String password) throws Exception{
    
    
        //返回生成指定算法密钥生成器的 KeyGenerator 对象
        KeyGenerator kg = null;
        try {
    
    
            kg = KeyGenerator.getInstance(KEY_ALGORITHM);
            //AES 要求密钥长度为原来是128 改为256
            kg.init(128, new SecureRandom(password.getBytes()));
            //kg.init(256, new SecureRandom(password.getBytes()));          
            //生成一个密钥
            SecretKey secretKey = kg.generateKey();
            return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥
        } catch (NoSuchAlgorithmException ex) {
    
    
            Logger.getLogger(AesUtil.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;
    }
    public static void main(String[] args) {
    
    
        String s = "www.gowhere.so";
        String ds = "U2FsdGVkX1+tkVuF5xURedkO5cap7WhCGvrW9ETFHLg=";
        String password = "1234567890123456";
        try {
    
    
   byte[] ba = AesUtil.encrypt(s, password);
   System.out.println(Base64.encodeToString(ba, false));
   byte[] da = AesUtil.decrypt(ba, password);
   System.out.println(new String(da, Encoding.UTF8));
  } catch (Exception e) {
    
    
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
        //System.out.println("s:" + s);
    }
}