Qt以Base64加密作为基础实现3种加解密方式（包含中文处理）

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } QString MainWindow::toUpperAndLower(QString src) { for(int i = 0; i < src.count(); i++) { QChar curC = src.at(i); if(curC.isUpper()) { curC = curC.toLower(); } else if(curC.isLower()){ curC = curC.toUpper(); } src[i] = curC; } return src; } QString MainWindow::toXOREncryptUncrypt(QString src, const QChar key) { for(int i = 0; i < src.count(); i++) { src[i] = src.at(i).toLatin1() ^ key.toLatin1(); } return src; } void MainWindow::on_pushButton_a_clicked() { QByteArray text = ui->lineEdit_a->text().toLocal8Bit(); QByteArray by = text.toBase64(); ui->label_a->setText(by); ui->lineEdit_j->setText(by); } void MainWindow::on_pushButton_j_clicked() { QByteArray text = ui->lineEdit_j->text().toLocal8Bit(); QByteArray by = text.fromBase64(text); QString str = QString::fromLocal8Bit(by); ui->label_j->setText(str); } void MainWindow::on_pushButton_a_2_clicked() { QByteArray text = ui->lineEdit_a_2->text().toLocal8Bit(); QByteArray by = text.toBase64(); QString str = QString(by); str = toUpperAndLower(str); // 加密 ui->label_a_2->setText(str); ui->lineEdit_j_2->setText(str); } void MainWindow::on_pushButton_j_2_clicked() { QString str = toUpperAndLower(ui->lineEdit_j_2->text()); //解密 QByteArray text = str.toLocal8Bit(); QByteArray by = text.fromBase64(text); str = QString::fromLocal8Bit(by); ui->label_j_2->setText(str); } void MainWindow::on_pushButton_a_3_clicked() { QByteArray text = ui->lineEdit_a_3->text().toLocal8Bit(); QByteArray by = text.toBase64(); QString str = QString(by); str = toXOREncryptUncrypt(str, 'g'); // 加密 --- 注意：（这里的key是可以指定为任意字符的，相应的，解密也要同意字符才行） ui->label_a_3->setText(str); ui->lineEdit_j_3->setText(str); } void MainWindow::on_pushButton_j_3_clicked() { QString str = toXOREncryptUncrypt(ui->lineEdit_j_3->text(), 'g'); //解密 QByteArray text = str.toLocal8Bit(); QByteArray by = text.fromBase64(text); str = QString::fromLocal8Bit(by); ui->label_j_3->setText(str); }