Qt Md5应用示例

【1】.cpp文件

#include "widget.h"
#include "ui_widget.h"
#include <QCryptographicHash>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    connect(ui->lineEdit, &QLineEdit::textChanged, this, &Widget::onGetMd5);

    setWindowTitle("Md5");
    setFixedSize(350, 80);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::onGetMd5()
{
    QString strText = ui->lineEdit->text();
    if (strText.isEmpty())
    {
        ui->label->clear();
        return;
    }

    QByteArray byteText = strText.toUtf8(); //原方式：toLatin1();为了支持中文：toUtf8()
    QString strPwdMd5 = QCryptographicHash::hash(byteText, QCryptographicHash::Md5).toHex();
    ui->label->setText(strPwdMd5);
}

【2】.h文件

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();

private slots:
    void onGetMd5();

private:
    Ui::Widget *ui;
};

#endif // WIDGET_H

【3】效果图

如上所述，不做赘述。

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