通俗易懂玩Qt：文件校验码生成器的实现（内附源码）

迷南。 2022-08-28 03:56 182阅读 0赞

# Qt 实现文件校验码生成器（内附源码） #

该软件是基于 CertUtil 的一个文件文件校验码生成，旨在提高下载程序的一个安全系数，防止黑客攻击网站后，将携带病毒的程序放在下载链接上，当用户使用程序时，被移植的病毒破坏系统，盗取可用信息，留下后门。

## 一、实验效果与开发环境 ##

效果图如下：

![请添加图片描述][62f5837603874a5f8aa015efecc8831b.gif]

开发环境：  
![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5oiR5piv5re35a2Q5oiR5oCV6LCB_size_15_color_FFFFFF_t_70_g_se_x_16]

# 二、实验源代码 #

> dealProcess.h

class DealProcess : public QObject { 
        Q_OBJECT
    
    public:
        explicit DealProcess(QObject *parent = nullptr);
        ~DealProcess();
    
        void write(QString data);
        QByteArray exec(QString command, QStringList args);
    
    private:
        QProcess *process;
        QByteArray data_in;
    
        void init();
    };

> dealProcess.c

DealProcess::DealProcess(QObject *parent) :
        QObject(parent) { 
    
        init();
    }
    
    DealProcess::~DealProcess() { }
    
    void DealProcess::init() { 
        process = new QProcess;
        data_in.resize(0);  //将数据初始化为 0
    }
    
    QByteArray DealProcess::exec(QString command, QStringList args) { 
        QByteArray res = "Process had been executed!"; //定义一个
    
        process -> start(command, args);    //开启一条命令执行通道
    
        if(!process -> waitForStarted()) {   //等待命令通道的开启
            return "Process start failed!"; //否则返回命令通道失败
        }
    
        if(data_in.size() != 0) {            //判断写入数据的长度是否为 0，是则跳过写入步骤
            process -> write(data_in);      //写入数据
            process -> closeWriteChannel(); //关闭数据写入通道
        }
    
        if(!process -> waitForFinished()) {  //等待命令自行完成
            return "Process finished failed!";  //否则返回命令执行失败
        }
    
        data_in.resize(0);  //将数据还原为 0
    
        res = process -> readAll();    //接收反馈数据
    
        return res; //返回反馈数据
    }
    
    void DealProcess::write(QString data) { 
        QByteArray byteArray;   //初始化一个 QByteArray 变量用来接收需要写入的数据
    
        byteArray = data.toUtf8().data();   //使用变量 byteArray 接收写入数据
        data_in.resize(byteArray.size());   //根据接收数据大小重新定义类成员变量 data_in 的大小
        data_in = byteArray;    //将变量 byteArray 接收到的数据写入到类成员变量
    }

> mainWindow.h

namespace Ui { 
    class MainWindow;
    }
    
    class MainWindow : public QMainWindow { 
        Q_OBJECT
    
    public:
        explicit MainWindow(QWidget *parent = nullptr);
        ~MainWindow();
    
    private:
        Ui::MainWindow *ui;
        DealProcess *deal_process;
    
        QFileDialog *file_dialog;
    
        QMessageBox *message_box;
    
        QClipboard *clipboard;
    
        QString command;
        QStringList args;
    
        QPalette pale;
        QColor color,
               drop_color;
    
        void configInit();
        void uiInit();
        void connectInit();
        void setBackgroung(QColor color);
        void setUrl(QString url);
    
    protected:
        void dragEnterEvent(QDragEnterEvent *e);
        void dragLeaveEvent(QDragLeaveEvent *e);
        void dropEvent(QDropEvent *e);
    };

> mainWindow.c

MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow) { 
        ui -> setupUi(this);
    
        configInit();
        uiInit();
        connectInit();
    }
    
    MainWindow::~MainWindow() { 
        delete ui;
    }
    
    void MainWindow::setBackgroung(QColor color) { 
        pale = palette();
        pale.setColor(QPalette::Window, color);
        setPalette(pale);
    }
    
    void MainWindow::setUrl(QString url) { 
        ui -> labFileUrl -> setText(url);
        ui -> labFileUrl -> setToolTip(tr(url.toLocal8Bit().data()));
        args[1] = url;
    }
    
    void MainWindow::configInit() { 
        deal_process = new DealProcess; //初始化命令处理类
        command = "CertUtil";
        args << "-hashfile" << "" << "md5";
        file_dialog = new QFileDialog;
        color.setRgb(243, 243, 243, 255);       //窗口背景色
        drop_color.setRgb(230, 230, 230, 250);  //拖拽进入后的窗口背景色
        clipboard = QApplication::clipboard();
    
        setWindowTitle("文件校验码生成器");
        setAcceptDrops(true);   //允许放下操作
        setBackgroung(color);
    }
    
    void MainWindow::uiInit() { 
        //QGroupBox init.
        ui -> grbChooseFile -> setTitle("选择校验文件");
        ui -> grbResult -> setTitle("运行结果");
        ui -> grbValue -> setTitle("校验值");
    
        //QPushButton init.
        ui -> btnChooseFile -> setText("选择文件");
        ui -> btnCreateFileChecker -> setText("获取校验");
        ui -> btnCopyCode -> setText("复制代码");
    
        //QComboBox init
        QStringList str_list_check_type;
        str_list_check_type << "MD2" << "MD4" << "MD5" << "SHA1" << "SHA256" << "SHA384" << "SHA512";
        for(int i = 0; i < str_list_check_type.length(); i ++) { 
            ui -> cbbCheckType -> addItem(str_list_check_type[i], str_list_check_type[i]);
        }
        ui -> cbbCheckType -> setCurrentText("MD5");
    
        //QPlainTextEdit
        ui -> ptedResult -> setDisabled(true);
    
        //QMessageBox
        message_box = new QMessageBox;
        message_box -> setButtonText(QMessageBox::Close, QString("关闭"));
    
        //QLabel
        ui -> labFileUrl -> setText("");
    
        //QStatusBar
        ui -> statusBar ->addPermanentWidget(new QLabel("<font>©</font>2021-2099 我是混子我怕谁"));
    
        //QMenu
        ui -> actionQuit -> setShortcut(Qt::CTRL | Qt::Key_Q);
    
        ui -> actionCompare -> setShortcut(Qt::ALT | Qt::Key_C);
    }
    
    void MainWindow::connectInit() { 
        //QPushButton
        connect(ui -> btnChooseFile, &QPushButton::clicked, [=] { 
            QString url;
            url = file_dialog -> getOpenFileName(this,
                                                 tr("选择文件"),
                                                 QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),
                                                 tr("所有文件(*.*);;压缩文件(*.zip *.rar *.7z);;"));
            setUrl(url);
        });
    
        connect(ui -> btnCreateFileChecker, &QPushButton::clicked, [=] { 
            QString res = "";
    
            if(args[1] != "") { 
                res = QString::fromLocal8Bit(deal_process -> exec(command, args));
                ui -> ptedResult -> clear();
                ui -> ptedResult -> appendPlainText(res);
                ui -> ledCheckerCode -> setText(res.split("\r\n")[1].split(' ').join(""));
            }
            else { 
                message_box -> critical(this, "温馨提示", "请选择即将校验的文件！", QMessageBox::Close);
            }
        });
    
        connect(ui -> btnCopyCode, &QPushButton::clicked, [=] { 
            QString checker_code = ui -> ledCheckerCode -> text();  //获取校验码
    
            if(checker_code != "") {     // 判断校验码是否为空
                clipboard -> setText(checker_code);
            }
        });
    
        //QComboBox
        connect(ui -> cbbCheckType, &QComboBox::currentTextChanged, [=](QString check_type) { 
            args[2] = check_type;
        });
    
        //QMenu
        connect(ui -> actionQuit, &QAction::triggered, [=] { 
            QMainWindow::close();
        });
    
        connect(ui ->actionCompare, &QAction::triggered, [=] { 
            qDebug() << 1;
        });
    }
    
    void MainWindow::dragEnterEvent(QDragEnterEvent *e) { 
        e -> acceptProposedAction();    //接收放下操作
    
        setBackgroung(drop_color);
    }
    
    void MainWindow::dragLeaveEvent(QDragLeaveEvent *e) { 
        Q_UNUSED(e);
    
        setBackgroung(color);
    }
    
    void MainWindow::dropEvent(QDropEvent *e) { 
        setBackgroung(color);
    
        QList<QUrl> urls = e -> mimeData() -> urls();
    
        if(urls.length() != 1) { 
            message_box -> critical(this, "友情提示", "不接受多个文件，请拖拽单个\r\n文件！", QMessageBox::Close);
            return;
        }
    
        QString url = urls[0].path().mid(1);
    
        if(QFileInfo(url).isDir()) { 
            message_box -> critical(this, "友情提示", "不接受文件夹，请拖拽单个\r\n文件！", QMessageBox::Close);
            return;
        }
    
        setUrl(url);
    }

源码分享：[https://gitee.com/mjzhutianxiu/filechecker][https_gitee.com_mjzhutianxiu_filechecker]

后续还会在原有的基础上做微调，详细源码。

学习分享，一起成长！以上为小编的经验分享，若存在不当之处，请批评指正！

[62f5837603874a5f8aa015efecc8831b.gif]: /images/20220828/79a510e61c134c669ab91ef983070b05.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5oiR5piv5re35a2Q5oiR5oCV6LCB_size_15_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/0214d57705fc48c4b07e88e97e7e95a0.png
[https_gitee.com_mjzhutianxiu_filechecker]: https://gitee.com/mjzhutianxiu/filechecker