QT文件IO操作

打开文本文件到一个textEdit控件里

void MainWindow::loadFile(const QString &fileName){    QFile file(fileName);    if (!file.open(QFile::ReadOnly | QFile::Text)) {        QMessageBox::warning(this, tr("Application"),                             tr("Cannot read file %1:\n%2.")                             .arg(fileName)                             .arg(file.errorString()));        return;    }    QTextStream in(&file);    textEdit->setPlainText(in.readAll());    setCurrentFile(fileName);    statusBar()->showMessage(tr("File loaded"), 2000);}

获取文件名称

QFileInfo(fullFileName).fileName();