Qt QTableWidget表格导出为html表格

╰+攻爆jí腚メ 2022-10-18 01:51 257阅读 0赞

###                                                        Qt QTableWidget表格导出为html表格 ###

**一、简述**

记--QTableWidget导出为html表格。

用途举例:

1、数据对比，比如数据库数据，需要对比合并，此时可转为文本，然后使用beyong compare、meld等工具进行对比差异。

2、通用性场景，相对一excel表格，excel表格需要office或wps工具查看，html只需要又浏览器即可，移动端，PC端（windos、linux、IOS均可），且数据轻巧便携。

例子打包：下载:https://wwa.lanzoui.com/iusW5pspozc 密码:hd8v

**二、效果**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1][]

![20210605110616259.gif][]

**三、工程结构**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 2][]

![20210605110535940.gif][]

**四、测试代码**

HtmlTable.pro文件

QT       += core gui
    
    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    
    TARGET = HtmlTable
    TEMPLATE = app
    
    
    SOURCES += main.cpp\
            mainwindow.cpp \
        htmltable.cpp
    
    HEADERS  += mainwindow.h \
        htmltable.h
    
    FORMS    += mainwindow.ui

htmltable.h文件

#ifndef HTMLTABLE_H
    #define HTMLTABLE_H
    
    #include <QList>
    
    #define TABEL_TD_TEXT_MAX_LEN   (256)
    
    enum {
        ALIGN_LEFT      = 1,
        ALIGN_RIGHT     = 2,
        ALIGN_CENTER    = 3
    };
    
    enum {
        Out_FAIL    = -1,
        Out_OK      = 0,
    };
    
    typedef struct {
        unsigned int align;
        unsigned int colspan;
        unsigned int rowspan;
        unsigned int bgColor;
        char text[TABEL_TD_TEXT_MAX_LEN];
    } Table_TD_t;
    
    typedef struct {
        QList<Table_TD_t> td_list;
    } Table_TR_t;
    
    typedef struct {
        QString title;
        QString info;
        QList<Table_TR_t> tr_list;
    } Table_t;
    
    int OutHtmlTable(QString filePath, Table_t *table);
    
    #endif // HTMLTABLE_H

mainwindow.h文件

#ifndef MAINWINDOW_H
    #define MAINWINDOW_H
    
    #include <QMainWindow>
    
    #define MIN(a,b)    ((a)>(b)?(a):(b))
    #define TEST_TABLE_ROW_COUNT    (5)
    #define TEST_TABLE_COL_COUNT    (10)
    #define DATE_TIME_STR_MAX_LEN   (32)
    
    namespace Ui {
    class MainWindow;
    }
    
    class MainWindow : public QMainWindow
    {
        Q_OBJECT
    
    public:
        explicit MainWindow(QWidget *parent = 0);
        ~MainWindow();
    
    private slots:
        void on_pushButtonTestHtmlTable_clicked();
    
        void on_pushButtonExportHtmltable_clicked();
    
    private:
        Ui::MainWindow *ui;
    };
    
    #endif // MAINWINDOW_H

htmltable.cpp文件

#include "htmltable.h"
    #include <QFile>
    #include <QTextStream>
    
    //文本对齐ID转字符串
    static QString Align2Str(int align)
    {
        QString align_str = "";
        switch (align)
        {
            case ALIGN_LEFT:
                align_str = "left";
                break;
            case ALIGN_RIGHT:
                align_str = "right";
                break;
            case ALIGN_CENTER:
                align_str = "center";
                break;
        }
        return align_str;
    }
    
    //格式化TD行
    static QString FormatTD(Table_TD_t &td) {
        QString td_str = "<td";
    
        //文本对齐
        if (0 < td.align) {
            td_str += " align=\"";
            td_str += Align2Str(td.align);
            td_str += "\"";
        }
    
        //跨列
        if (0 < td.colspan) {
            td_str += QString::asprintf(" colspan=\"%d\"", td.colspan);
        }
    
        //跨行
        if (0 < td.rowspan) {
            td_str += QString::asprintf(" rowspan=\"%d\"", td.rowspan);
        }
    
        //背景色 bgcolor
        if (0 < td.bgColor) {
            td_str += QString::asprintf(" bgcolor=\"#%x\"", td.bgColor);
        }
    
        td_str += ">";
    
        //内容
        if (strnlen(td.text, sizeof(td.text))) {
            td_str += QString::fromLocal8Bit(td.text);
        }
    
        td_str += "</td>";
        return td_str;
    }
    
    //输出Html表格
    int OutHtmlTable(QString filePath, Table_t *table)
    {
        int i;
        int j;
        int tr_count;
        int td_count;
    
        if (NULL == table) {
            return Out_FAIL;
        }
    
        QFile file(filePath);
        if( file.open(QIODevice::WriteOnly | QIODevice::Text) ) {
            QTextStream out(&file);
    
            out << QString("<!DOCTYPE html>") << endl;
            out << QString("<html>") << endl;
            out << QString("<head>") << endl;
            out << QString("<meta charset=\"utf-8\">") << endl;
            out << QString("<title>");
            out << table->title << QString("</title>") << endl;
            out << QString("</head>") << endl;
            out << QString("<body>") << endl;
            out << QString(table->info) << endl;
            out << QString("<table border=\"1\">") << endl;
            //数据
            tr_count = table->tr_list.count();
            for (i = 0; i < tr_count; ++i) {
                out << QString("<tr>") << endl;
    
                //td 行数据
                td_count = table->tr_list[i].td_list.count();
                for (j = 0; j < td_count; ++j) {
                    out << FormatTD(table->tr_list[i].td_list[j]) << endl;
                }
    
                out << QString("</tr>") << endl;
            }
    
            out << QString("</table>") << endl;
            out << QString("</body>") << endl;
            out << QString("</html>") << endl;
    
            file.close();
            return Out_OK;
        }
        return Out_FAIL;
    }

main.cpp文件

#include "mainwindow.h"
    #include <QApplication>
    #include <QTextCodec>
    
    int main(int argc, char *argv[])
    {
    
        QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
        QApplication a(argc, argv);
        MainWindow w;
        w.show();
    
        return a.exec();
    }

mainwindow.cpp文件

#include "mainwindow.h"
    #include "ui_mainwindow.h"
    #include "htmltable.h"
    #include <QMessageBox>
    #include <QDateTime>
    #include <QFileDialog>
    
    MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow)
    {
        ui->setupUi(this);
        this->setWindowTitle(tr("Html表格测试"));
        ui->tableWidget->setRowCount(3);
        ui->tableWidget->setColumnCount(2);
        QStringList strList ;
        strList << "努力" << "奋斗";
        ui->tableWidget->setHorizontalHeaderLabels(strList);
        ui->tableWidget->verticalHeader()->setVisible(false);
        ui->tableWidget->setItem(0,0,new QTableWidgetItem("加油"));
        ui->tableWidget->setItem(0,1,new QTableWidgetItem("坚持"));
        ui->tableWidget->setItem(1,0,new QTableWidgetItem("勤奋"));
        ui->tableWidget->setItem(1,1,new QTableWidgetItem("学习"));
        ui->tableWidget->setItem(2,0,new QTableWidgetItem("世界"));
        ui->tableWidget->setItem(2,1,new QTableWidgetItem("和平"));
    }
    
    MainWindow::~MainWindow()
    {
        delete ui;
    }
    
    void MainWindow::on_pushButtonTestHtmlTable_clicked()
    {
        int i;
        int j;
        int row_count = TEST_TABLE_ROW_COUNT;
        int col_count = TEST_TABLE_COL_COUNT;
        Table_t table;
        table.title = "Hello Html Table";
        table.info = QString("Table Create Time:") + \
                QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    
        //首行
        Table_TD_t table_td_head = {ALIGN_CENTER, 0, 0, 0, ""};
        Table_TR_t table_tr_head;
    
        //序号列
        strcpy(table_td_head.text, "No.");
        table_tr_head.td_list.append(table_td_head);
    
        //合并2列
        table_td_head.colspan = 2;
        table_td_head.bgColor = 0xcce8cf;
        strcpy(table_td_head.text, "标题1");
        table_tr_head.td_list.append(table_td_head);
    
        //合并5列
        table_td_head.colspan = 5;
        table_td_head.bgColor = 0x99CCFF;
        strcpy(table_td_head.text, "标题2");
        table_tr_head.td_list.append(table_td_head);
    
        //合并2列
        table_td_head.colspan = 3;
        table_td_head.bgColor = 0x99FF99;
        strcpy(table_td_head.text, "标题3");
        table_tr_head.td_list.append(table_td_head);
        table.tr_list.append(table_tr_head);
    
        //表格内容1
        Table_TD_t table_td = {0, 0, 0, 0, ""};
        for (i = 0; i < row_count; i++) {
            Table_TR_t table_tr;
            sprintf(table_td.text, "%d", i+1);
            table_tr.td_list.append(table_td);
            for (j = 0; j < col_count; j++) {
                sprintf(table_td.text, "Hello %d", j);
                table_tr.td_list.append(table_td);
            }
            table.tr_list.append(table_tr);
        }
    
        //合并行测试
        Table_TD_t table_td2 = {ALIGN_CENTER, 0, 0, 0, ""};
        Table_TR_t table_tr2;
    
        table_td2.rowspan = col_count;
        strcpy(table_td2.text, "合并行测试");
        table_tr2.td_list.append(table_td2);
        table.tr_list.append(table_tr2);
    
        //表格内容2
        Table_TD_t table_td3 = {0, 0, 0, 0, ""};
        for (i = 0; i < row_count; i++) {
            Table_TR_t table_tr;
            sprintf(table_td3.text, "%d", i+1);
            table_tr.td_list.append(table_td3);
            for (j = 0; j < col_count - 1; j++) {
                sprintf(table_td3.text, "Hello %d", j);
                table_tr.td_list.append(table_td3);
            }
            table.tr_list.append(table_tr);
        }
    
        //打开文件对话框，返回选择文件的绝对路径  父窗体   标题      默认打开路径(不写就会打开当前路径)
        QString save_file = QFileDialog::getSaveFileName(this, \
                                                         tr("保存文件"), \
                                                         "C:\\Users\\Liang\\Desktop\\test1.html", \
                                                         tr("html文件(*.html)"));
        if (0 >= save_file.length()) {
            return;
        }
    
        if (Out_OK == OutHtmlTable(save_file, &table)) {
            QMessageBox::information(this, tr("提示"), tr("已输出到")+save_file);
        } else {
            QMessageBox::critical(this, tr("提示"), tr("导出html失败!"));
        }
    }
    
    void MainWindow::on_pushButtonExportHtmltable_clicked()
    {
        int row;
        int col;
        int row_count = ui->tableWidget->rowCount();
        int col_count = ui->tableWidget->columnCount();
        QString str = "";
    
        //打开文件对话框，返回选择文件的绝对路径  父窗体   标题      默认打开路径(不写就会打开当前路径)
        QString save_file = QFileDialog::getSaveFileName(this, \
                                                         tr("保存文件"), \
                                                         "C:\\Users\\Liang\\Desktop\\test1.html", \
                                                         tr("html文件(*.html)"));
        if (0 >= save_file.length()) {
            return;
        }
    
        Table_t table;
        table.title = "Hello Html Table";
        table.info = QString("Table Create Time:") + \
                QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    
        //首行
        Table_TD_t table_td_head = {ALIGN_CENTER, 0, 0, 0, ""};
        Table_TR_t table_tr_head;
        for (col = 0; col < col_count; col++) {
            str = ui->tableWidget->horizontalHeaderItem(col)->text();
            strncpy(table_td_head.text, \
                    str.toLocal8Bit().data(),
                    sizeof(table_td_head.text)-1);
            table_tr_head.td_list.append(table_td_head);
        }
        table.tr_list.append(table_tr_head);
    
        //表格内容
        Table_TD_t table_td = {0, 0, 0, 0, ""};
        for (row = 0; row < row_count; row++) {
            Table_TR_t table_tr;
            for(col = 0; col < col_count; col++) {
                str = ui->tableWidget->item(row, col)->text();
                strncpy(table_td.text, \
                        str.toLocal8Bit().data(),
                        sizeof(table_td.text)-1);
                table_tr.td_list.append(table_td);
            }
            table.tr_list.append(table_tr);
        }
    
    
        if (Out_OK == OutHtmlTable(save_file, &table)) {
            QMessageBox::information(this, tr("提示"), tr("已输出到")+save_file);
        } else {
            QMessageBox::critical(this, tr("提示"), tr("导出html失败!"));
        }
    }

**五、待完善**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70]: /images/20221014/239846c9e8424bddb2c54fdb7c50c5ff.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1]: /images/20221014/f0e8eb30d0664f9a8795a254fb542056.png
[20210605110616259.gif]: /images/20221014/df6c26795c9f460eb1e9962f74690968.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 2]: /images/20221014/8e49ac08d63c4ab382491f7022cee1da.png
[20210605110535940.gif]: /images/20221014/a941660144764192b6b467f87ddd20fa.png