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Qt中txt文件输出为PDF格式

news 2025/8/29 8:17:07

main.cpp

    PdfReportGenerator pdfReportGenerator;// 加载中文字体if (QFontDatabase::addApplicationFont(":/new/prefix1/simsun.ttf") == -1) {QMessageBox::warning(nullptr, "警告", "无法加载中文字体");}// 解析日志文件QVector<LogEntry> entries;if (!pdfReportGenerator.parseLogFile("1.txt", entries)) {QMessageBox::critical(nullptr, "错误", "无法打开日志文件");return ;}// 生成PDF表格pdfReportGenerator.createPdfWithTable(entries);QMessageBox::information(nullptr, "完成", "PDF表格已生成: output_table.pdf");

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类实现

.cpp文件

#include "PdfReportGenerator.h"bool PdfReportGenerator::parseLogFile(const QString &filename, QVector<LogEntry> &entries) {QFile file(filename);if (!file.open(QIODevice::ReadOnly)) return false;QTextStream in(&file);in.setCodec("UTF-8");in.readLine(); // 跳过标题行while (!in.atEnd()) {QString line = in.readLine().trimmed();if (line.isEmpty()) continue;QStringList parts = line.split("\t", Qt::SkipEmptyParts);if (parts.size() < 6) continue;LogEntry entry;entry.command = parts[0].trimmed();entry.frame = parts[1].trimmed();entry.success = parts[2].trimmed().toInt();entry.fail = parts[3].trimmed().toInt();entry.timeout = parts[4].trimmed();entry.duration = parts[5].replace("ms", "").trimmed().toInt();entry.gapPos = (parts.size() > 6) ? parts[6].trimmed() : "";entries.append(entry);}return true;
}void PdfReportGenerator::createPdfWithTable(const QVector<LogEntry> &entries) {// 创建文档对象QTextDocument doc;QTextCursor cursor(&doc);// 设置中文字体QFont font("SimSun", 10);doc.setDefaultFont(font);// 添加标题cursor.insertText("日志数据报表\n", QTextCharFormat());cursor.insertBlock();// 创建表格（列数=7，行数=数据行数+1）QTextTable *table = cursor.insertTable(entries.size() + 1, 7);// 设置表头QStringList headers = {"命令", "帧/时间/次数", "成功次数","失败次数", "是否超时", "消耗时间", "缝隙位置"};for (int i = 0; i < headers.size(); ++i) {QTextTableCell cell = table->cellAt(0, i);QTextCursor cellCursor = cell.firstCursorPosition();cellCursor.insertText(headers[i]);cell.format().setBackground(Qt::lightGray); // 表头背景色}// 填充数据for (int row = 0; row < entries.size(); ++row) {const LogEntry &entry = entries[row];QStringList rowData = {entry.command,entry.frame,QString::number(entry.success),QString::number(entry.fail),entry.timeout,QString::number(entry.duration) + "ms",entry.gapPos};for (int col = 0; col < rowData.size(); ++col) {QTextTableCell cell = table->cellAt(row + 1, col);QTextCursor cellCursor = cell.firstCursorPosition();cellCursor.insertText(rowData[col]);// 数字列右对齐if (col >= 2 && col <= 5) {QTextBlockFormat format;format.setAlignment(Qt::AlignRight);cellCursor.setBlockFormat(format);}}}// 设置表格样式QTextTableFormat tableFormat;tableFormat.setHeaderRowCount(1);tableFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Solid);tableFormat.setBorder(1);table->setFormat(tableFormat);// 导出PDFQPrinter printer(QPrinter::HighResolution);printer.setOutputFormat(QPrinter::PdfFormat);printer.setOutputFileName("output_table.pdf");printer.setPageSize(QPageSize(QPageSize::A4));doc.print(&printer);
}

.h文件

#ifndef PDFREPORTGENERATOR_H
#define PDFREPORTGENERATOR_H
#include <QApplication>
#include <QFile>
#include <QTextStream>
#include <QTextDocument>
#include <QTextTable>
#include <QPrinter>
#include <QFontDatabase>
#include <QPdfWriter>
#include <QPainter>
#include "qcustomplot.h"struct LogEntry {QString command;QString frame;int success;int fail;QString timeout;int duration;QString gapPos;
};class PdfReportGenerator : public QObject {
public:void createPdfWithTable(const QVector<LogEntry> &entries);bool parseLogFile(const QString &filename, QVector<LogEntry> &entries);
};#endif // PDFREPORTGENERATOR_H

实现效果