获取本地时间

1，获取本地时间：              
   QDateTime current_date_time =QDateTime::currentDateTime();

  QString current_date =current_date_time.toString("hh_mm_ss_zzz");

 2，创建目录

m_scan_picture_target_dir = QDir::currentPath() + "/picture_targets/auto_scan_picture_" + current_date;

                        QDir dir;

                        //目录不存在创建目录

                        if (!dir.exists(m_scan_picture_dir))

                        {

                             bool res = dir.mkpath(m_scan_picture_dir);

                        }

                        if (!dir.exists(m_scan_picture_target_dir))

                        {

                             bool res = dir.mkpath(m_scan_picture_target_dir);

                        }

3，//文件保存路径

                    fileName = m_scan_picture_dir + "/" + fileName;

                    template_picture_dir = QDir::currentPath() + "/Template_picture/auto_scan_template" + QString::number(m_pictureInfo[0].m_pic_index) +  ".jpeg";

                    QFileInfo fileTemplate(template_picture_dir);

                    m_pictureInfo[0].img.save(fileName,"JPEG",100);