QT5 生成pdf的一些代码

QT5 生成pdf的一段代码：

QPdfWriter +QPainter
原贴地址：  
已经改编过

    QString fileName="d:/aaa.pdf";
    QFile pdfFile(fileName);
    pdfFile.open(QIODevice::WriteOnly);                 // 打开要写入的pdf文件
    QPdfWriter* pPdfWriter = new QPdfWriter(&pdfFile);  // 创建pdf写入器
    pPdfWriter->setPageSize(QPagedPaintDevice::A4);     // 设置纸张为A4
    pPdfWriter->setResolution(300);                     // 设置纸张的分辨率为300,因此其像素为3508X2479

    int iMargin = 60;                   // 页边距
    pPdfWriter->setPageMargins(QMarginsF(iMargin, iMargin, iMargin, iMargin));

    QPainter* pPdfPainter = new QPainter(pPdfWriter);   // qt绘制工具

    // 标题,居中
    QTextOption option(Qt::AlignHCenter | Qt::AlignVCenter);
    option.setWrapMode(QTextOption::WordWrap);

    // 标题上边留白
    int iTop = 100;

    // 文本宽度2100
    int iContentWidth = 2100;

    // 标题,22号字
    QFont font;
    font.setFamily("simhei.ttf");
    //font.setFamily("黑体");
    int fontSize = 22;
    font.setPointSize(fontSize);
    pPdfPainter->setFont(font);                    // 为绘制工具设置字体
    //pPdfPainter->drawText(QRect(0, iTop, iContentWidth, 90),
    //    QString::fromLocal8Bit("我的标题我骄傲"), option);
    pPdfPainter->drawText(QRect(0, iTop, iContentWidth, 90),"我的标题我骄傲", option);

    // 内容,16号字，左对齐
    fontSize = 16;
    font.setPointSize(fontSize);
    pPdfPainter->setFont(font);
    option.setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    iTop += 60;
    pPdfPainter->drawText(QRect(0, iTop, iContentWidth, 60),"1、目录一");
    iTop += 60;
    // 左侧缩进2字符
    int iLeft = 120;
    pPdfPainter->drawText(QRect(iLeft, iTop, iContentWidth - iLeft, 60),"我的目录一的内容。", option);
    iTop += 60;
    pPdfPainter->drawText(QRect(0, iTop, iContentWidth, 60), "2、目录二");
    iTop += 60;
    pPdfPainter->drawText(QRect(iLeft, iTop, iContentWidth - iLeft, 60),"我的目录2的内容", option);

    delete pPdfPainter;
    delete pPdfWriter;
    pdfFile.close();

另一段代码  原帖 https://blog.csdn.net/toby54king/article/details/79109545

/***************************.h*************************************/
#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QPrinter>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

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

    /// 设置PDF文件名字
    void setPdfName(QString fileName);
    /// 写入文字到pdf上
    void writeTextToPdf(QString text);
    /// 插入图片到PDF上
    void insertPictureToPdf(QString picFile);
    /// 结束绘制
    void endPainter();

    /// html转化为PDF
    QString saveHtmlToPDF();

private:
    Ui::Widget *ui;
    QPrinter *m_printer;
    QPainter *m_painter;
    int m_x;
    int m_y;
};

#endif // WIDGET_H

/***************************.cpp*************************************/
#include "widget.h"
#include "ui_widget.h"
#include <QPainter>
#include <QPixmap>
#include <QTextDocument>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    m_printer = new QPrinter;
    m_painter = new QPainter;
    m_x = 0;
    m_y = 0;

    QString pdfname = "E:/testhtmlpdf.pdf";
    QPrinter printer;
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setOutputFileName(pdfname);
    QTextDocument document;
    QString html = saveHtmlToPDF();
    document.setHtml(html);
    document.print(&printer);
    document.end();
}

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

//************************************
// 函数名称:setPdfName
// 函数说明：设置PDF文件名字并启动绘制
// 作    者：ISmileLi
//************************************
void Widget::setPdfName(QString fileName)
{
    m_printer->setPageSize(QPrinter::A4);
    m_printer->setOutputFormat(QPrinter::PdfFormat);
    m_printer->setOutputFileName(fileName);
    m_painter->begin(m_printer);
}

//************************************
// 函数名称:writeTextToPdf
// 函数说明：写入文字到PDF
// 作    者：ISmileLi
//************************************
void Widget::writeTextToPdf(QString text)
{
    if(m_printer == NULL)
        return;

    int height = 10;
    int width = 300;
    m_painter->drawText(m_x,m_y,width,height,0,text);
    m_y += height;
}

//************************************
// 函数名称:insertPictureToPdf
// 函数说明：插入图片到PDF
// 作    者：ISmileLi
//************************************
void Widget::insertPictureToPdf(QString picFile)
{
    if(m_printer == NULL)
        return;

    QPixmap *pixmap = new QPixmap(picFile);

    int width = pixmap->width();
    int height = pixmap->height();
    m_painter->drawPixmap(m_x,m_y,width,height,*pixmap);
    m_y += height;
}

//************************************
// 函数名称:insertPictureToPdf
// 函数说明：结束PDF绘制操作
// 作    者：ISmileLi
//************************************
void Widget::endPainter()
{
    m_painter->end();
}

//************************************
// 函数名称:saveHtmlToPDF
// 函数说明：html方法生成PDF
// 作    者：ISmileLi
//************************************
QString Widget::saveHtmlToPDF()
{
    QString html = "";
    html += "<html>";
    html += "<head>";
    html += "<title>qt实现生成PDF文档</title>";
    html += "<head>";
    html += "<body bgcolor=\"#ccccff\">";
    html += "<h1 style=\"background-color:red\">测试qt实现生成PDF文档</h1>";
    html += "<hr>";
    html += "<p>PDF插入图片<img src=\"E:/work/girl.jpg\" alt=\"picture\" width=\"100\" height=\"100\"></p>";
    html += "<hr>";
    html += "<table width=\"100%\" border=\"1\" cellspacing=\"1\" cellpadding=\"4\" align=\"center\">";
      html += "<tr>";
        html += "<td align=\"center\" height=\"60\">编程语言统计</td>";
      html += "</tr>";
      html += "<tr>";
        html += "<td align=\"center\" height=\"25\">2017-01-18---2018-01-18</td>";
      html += "</tr>";
    html += "</table>";
    html += "<table width=\"100%\" border=\"1\" cellspacing=\"1\" cellpadding=\"4\" bgcolor=\"#cccccc\" align=\"center\">";
        html += "<tr>";
            html += "<th>C/C++</th>";
            html += "<th>python</th>";
            html += "<th>java</th>";
            html += "<th>html</th>";
            html += "<th>Qt</th>";
        html += "</tr>";
        html += "<tr>";
            html += "<th>上升</th>";
            html += "<th>上升</th>";
            html += "<th>下降</th>";
            html += "<th>下降</th>";
            html += "<th>上升</th>";
        html += "</tr>";
    html += "</table>";
    html += "</body>";
    html += "</html>";
return html;
}

/***************************main.cpp*************************************/
#include "widget.h"
#include <QApplication>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.setPdfName("E:/testPDF.pdf");
    QStringList testList = (QStringList()<<"测试PDF文字写入" << "测试PDF写入hello word");
    foreach(QString text,testList)
    {
        w.writeTextToPdf(text);
        qDebug() << "text:" <<text;
    }
    w.insertPictureToPdf("E:/Monitor.png");
    w.insertPictureToPdf("E:/map.png");
    w.insertPictureToPdf("E:/girl.jpg");
    w.endPainter();
    w.show();
    return a.exec();
}