Qt编写的文本分割器

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDebug> #include <QSettings> #include <QMessageBox> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); readInit(configpath, "filepath", filepath); readInit(configpath, "savepath", savepath); readInit(configpath,"eachname",eachname); ui->lineEdit_sel->setText(filepath); ui->lineEdit_save->setText(savepath); ui->lineEdit_rename->setText(eachname); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_sel_clicked() { filepath=QFileDialog::getOpenFileName(this,"选择文件","../txtCut/","All file(*.*);;txt file(*.txt)"); ui->lineEdit_sel->setText(filepath); if(filepath==NULL) return; //或者filepath.isEmpty() QFileInfo info(filepath); filename=info.fileName().section('.',0,0);//获取文件名 ui->lineEdit_rename->setText(filename+'_'); filesize=info.size(); ui->label_filesize->setText(QString("%1 B").arg(filesize)); eachsize=filesize/num; ui->label_eachsize->setText(QString("%1 B").arg(eachsize)); savepath=info.absolutePath(); ui->lineEdit_save->setText(savepath); getstdsize(); ui->label_stdsize->setText(QString("%1 B").arg(stdsize)); } void MainWindow::on_pushButton_save_clicked() { savepath=QFileDialog::getExistingDirectory(this,"选择文件夹","../txtCut/",QFileDialog::ShowDirsOnly); ui->lineEdit_save->setText(savepath); } void MainWindow::on_spinBox_valueChanged(int arg1) { if(mode==3) return; if(filesize==0) return; num=arg1; eachsize=filesize/num; ui->label_eachsize->setText(QString("%1 B").arg(eachsize)); getstdsize(); ui->label_stdsize->setText(QString("%1 B").arg(stdsize)); } void MainWindow::on_pushButton_start_clicked() { if(filepath==NULL) return; modeInit(); if(cutsize==0) return; config(); QFile file(filepath); QFile data[num]; qint64 buffsize=buffersize(); if(file.open(QIODevice::ReadOnly|QIODevice::Truncate)) { QByteArray array; qint64 len=0; for(int i=0;i<num;++i) { data[i].setFileName(savepath+QString("/%1%2.txt").arg(eachname).arg(i)); data[i].open(QIODevice::WriteOnly|QIODevice::Truncate); while(file.atEnd()==false) { array=file.read(buffsize); len+=data[i].write(array); //qDebug()<<len; if(len>=cutsize*(i+1)){ data[i].close(); break; } } data[i].close(); if(file.atEnd()) break; } } else {return;} file.close(); QMessageBox::information(this,"","完成"); } void MainWindow::getstdsize() //获取最接近eachsize的2的幂次方 { qint64 i=1; qint64 num=eachsize; while(num>>1){ i=i<<1; num=num>>1; } stdsize=i<<1; } qint64 MainWindow::buffersize() { if(eachsize>1024)//K { eachsize/=1024; if(eachsize>1024)//M { eachsize/=1024; if(eachsize>1024)//G { return 1024*16; } return 1024*16; } return 1024; } return 64; } void MainWindow::on_lineEdit_rename_textChanged(const QString &arg1) { eachname=arg1; } void MainWindow::on_radioButton_eachsize_clicked() { mode=2; } void MainWindow::on_radioButton_stdsize_clicked() { mode=1; } void MainWindow::on_radioButton_clicked() { mode=3; } void MainWindow::on_lineEdit_fixedsize_textEdited(const QString &arg1) { fixedsize=arg1.toInt(); if(filesize==0) return; if(fixedsize<=0){ ui->label_fixedsize->setText("输入份数太小！"); return;} num=ceil(double(filesize)/double(fixedsize)); ui->label_fixedsize->setText(QString("%1").arg(num)); } void MainWindow::modeInit() { switch (mode) { case 1: cutsize=stdsize; break; case 2: cutsize=eachsize; break; case 3: cutsize=fixedsize; break; default: break; } } void MainWindow::config() { writeInit(configpath,"filepath",filepath); writeInit(configpath,"savepath",savepath); writeInit(configpath,"eachname",eachname); } bool MainWindow::writeInit(QString path, QString user_key, QString user_value) { if(path.isEmpty() || user_key.isEmpty()) { return false; } else { QSettings *config = new QSettings(path, QSettings::IniFormat,this); config->beginGroup("config"); config->setValue(user_key, user_value); config->endGroup(); return true; } } bool MainWindow::readInit(QString path, QString user_key, QString &user_value) { user_value = QString(""); if(path.isEmpty() || user_key.isEmpty()) { return false; } else { QSettings *config = new QSettings(path, QSettings::IniFormat,this); user_value = config->value(QString("config/") + user_key).toString(); return true; } }