qtxlsx读取Excel,无需本地存在excel或者wps驱动，读写操作更方便简洁。
一、 读取Excel表格
修改.pro文件，增加 axcontainer
QT += axcontainer
导入头文件
#include "QFileDialog"
#include "QAxObject"
生成打开文件窗口
QString strFile = QFileDialog::getOpenFileName(this,QStringLiteral("选择Excel文件"),"",tr("Exel file(*.xls *.xlsx)"));
if (strFile.isEmpty()){
return;
}
定义一个容器，存储读取数据
QVector<QString> arr; //存储每一行数据
QVector<QVector<QString>> array; //将每行数据汇总，类似于二维数组，但不需要手动定义空间大小，造成内存浪费
读Exceld的具体过程
QAxObject excel("Excel.Application"); //加载Excel驱动
excel.setProperty("Visible", false);//不显示Excel界面，如果为true会看到启动的Excel界面
QAxObject *work_books = excel.querySubObject("WorkBooks");
work_books->dynamicCall("Open (const QString&)", strFile); //打开指定文件
QAxObject *work_book = excel.querySubObject("ActiveWorkBook");
QAxObject *work_sheets = work_book->querySubObject("Sheets"); //获取工作表
QString ExcelName;
static int row_count = 0,column_count = 0;
int sheet_count = work_sheets->property("Count").toInt(); //获取工作表数目,如下图，有 3 页
if(sheet_count > 0)
{
QAxObject *work_sheet = work_book->querySubObject("Sheets(int)", 1); //设置为 获取第一页 数据
QAxObject *used_range = work_sheet->querySubObject("UsedRange");
QAxObject *rows = used_range->querySubObject("Rows");
row_count = rows->property("Count").toInt(); //获取行数
QAxObject *column = used_range->querySubObject("Columns");
column_count = column->property("Count").toInt(); //获取列数
//获取第一行第一列数据
ExcelName = work_sheet->querySubObject("Cells(int,int)", 1,1)->property("Value").toString();
//获取表格中需要的数据，此处是从第三行第二列获取数据，具体原因看下图理解，根据自己的需求获取信息
for (int i =3; i <= row_count; i++) {
for (int j = 2; j <= column_count;j++) {
QString txt = work_sheet->querySubObject("Cells(int,int)", i,j)->property("Value").toString(); //获取单元格内容
arr.append(txt);
}
array.append(arr);
arr.clear(); //将每行数据存储到array后，清空arr，避免下次循环时数据累计；arr.appeng()是添加不是赋值
}
work_book->dynamicCall("Close(Boolean)", false); //关闭文件
excel.dynamicCall("Quit(void)"); //退出
}
我的Excel表
二、 将数据导入Excel表,生成一个新表
include "QFile"
设置路径，并生成一个空白Excel
QString desktop_path = QStandardPaths::writableLocation(QStandardPaths::DesktopLocation);//获取桌面路径
QString excel_path_1 = desktop_path + "/LCU接线属性表.xlsx"; //设置文件路径、名、格式
if(!excel_path_1.isEmpty()){
QAxObject *excel = new QAxObject(this);
excel->setControl("Excel.Application");//连接Excel控件
excel->dynamicCall("SetVisible (bool Visible)","false");//不显示窗体
excel->setProperty("DisplayAlerts", true);//不显示任何警告信息。如果为true那么在关闭是会出现类似“文件已修改，是否保存”的提示
QAxObject *workbooks = excel->querySubObject("WorkBooks");//获取工作簿集合
workbooks->dynamicCall("Add");//新建一个工作簿
QAxObject *workbook = excel->querySubObject("ActiveWorkBook");//获取当前工作簿
QAxObject *worksheets = workbook->querySubObject("Sheets");//获取工作表集合
QAxObject *worksheet = worksheets->querySubObject("Item(int)",1);//获取工作表集合的工作表1，即sheet1
//标题行
QAxObject *cell;
cell=worksheet->querySubObject("Cells(int,int)", 1, 1);
cell->dynamicCall("SetValue(const QString&)", "LCU接线属性表");
cell->querySubObject("Font")->setProperty("Size", 11);
//合并标题行
QString cellTitle;
cellTitle.append("A1:");
cellTitle.append(QChar(4 + 'A'));
cellTitle.append(QString::number(1));
QAxObject *range = worksheet->querySubObject("Range(const QString&)", cellTitle);
range->setProperty("WrapText", true);
range->setProperty("MergeCells", true);
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
QAxObject *cellA,*cellB,*cellC,*cellD,*cellE;
//设置标题
int cellrow=2;
QString A="A"+QString::number(cellrow);//设置要操作的单元格，如A1
QString B="B"+QString::number(cellrow);
QString C="C"+QString::number(cellrow);
QString D="D"+QString::number(cellrow);
QString E="E"+QString::number(cellrow);
cellA = worksheet->querySubObject("Range(QVariant, QVariant)",A);//获取单元格
cellB = worksheet->querySubObject("Range(QVariant, QVariant)",B);
cellC=worksheet->querySubObject("Range(QVariant, QVariant)",C);
cellD=worksheet->querySubObject("Range(QVariant, QVariant)",D);
cellE=worksheet->querySubObject("Range(QVariant, QVariant)",E);
cellA->dynamicCall("SetValue(const QVariant&)",QVariant("序号"));//设置单元格的值
cellB->dynamicCall("SetValue(const QVariant&)",QVariant("IO面板"));
cellC->dynamicCall("SetValue(const QVariant&)",QVariant("接线板"));
cellD->dynamicCall("SetValue(const QVariant&)",QVariant("KW打包地址"));
cellE->dynamicCall("SetValue(const QVariant&)",QVariant("KW地址"));
for(int i=0;i<120;i++){
QString A="A"+QString::number(i+3);//设置要操作的单元格，如A1
QString B="B"+QString::number(i+3);
QString C="C"+QString::number(i+3);
QString D="D"+QString::number(i+3);
QString E="E"+QString::number(i+3);
cellA = worksheet->querySubObject("Range(QVariant, QVariant)",A);//获取单元格
cellB = worksheet->querySubObject("Range(QVariant, QVariant)",B);
cellC=worksheet->querySubObject("Range(QVariant, QVariant)",C);
cellD=worksheet->querySubObject("Range(QVariant, QVariant)",D);
cellE=worksheet->querySubObject("Range(QVariant, QVariant)",E);
cellA->dynamicCall("SetValue(const QVariant&)",QVariant(i+1));//设置单元格的值
range = worksheet->querySubObject("Range(const QString&)", A); //设置A单元格元素居中显示
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
cellB->dynamicCall("SetValue(const QVariant&)",QVariant(array[i][0]));
range = worksheet->querySubObject("Range(const QString&)", B); //设置B单元格元素居中显示
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
cellC->dynamicCall("SetValue(const QVariant&)",QVariant(array[i][1]));
range = worksheet->querySubObject("Range(const QString&)", C); //设置C单元格元素居中显示
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
cellD->dynamicCall("SetValue(const QVariant&)",QVariant(array[i][2]));
range = worksheet->querySubObject("Range(const QString&)", D); //设置D单元格元素居中显示
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
cellE->dynamicCall("SetValue(const QVariant&)",QVariant(array[i][3]));
range = worksheet->querySubObject("Range(const QString&)", E); //设置E单元格元素居中显示
range->setProperty("HorizontalAlignment", -4108);//xlCenter
range->setProperty("VerticalAlignment", -4108);//xlCenter
}
workbook->dynamicCall("SaveAs(const QString&)",QDir::toNativeSeparators(excel_path_1));//保存至filepath，注意一定要用QDir::toNativeSeparators将路径中的"/"转换为"\"，不然一定保存不了。
workbook->dynamicCall("Close()");//关闭工作簿
excel->dynamicCall("Quit()");//关闭excel
delete excel;
excel=NULL;
QMessageBox::information(NULL,"","LCU接线属性表导出完成");
}
