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qt中獲取檔案路徑和檔名、字尾名

QString file_full, file_name, file_path,file_suffix ;
QFileInfo fileinfo;
file_full = QFileDialog::getOpenFileName(this,.....);
fileinfo = QFileInfo(file_full);
//檔名
file_name = fileinfo.fileName(); 
//檔案字尾
file_suffix = fileinfo.suffix()
//絕對路徑
file_path = fileinfo.absolutePath();