vue3 excel转pdf并分页
在Vue 3中，将Excel文件转换为PDF并分页可以通过使用第三方库来实现。一个常用的库是xlsx和html2canvas。下面是一个简单的示例，演示如何使用这些库将Excel文件转换为PDF并分页：
首先，安装所需的库：
Bash
npm install xlsx html2canvas --save
然后，在你的Vue组件中，你可以创建一个方法来处理Excel到PDF的转换：
javascript
excel最强教科书完全版pdf
<template>
<div>
<input type="file" @change="handleFileUpload"/>
<button @click="convertToPdf">转换为PDF</button>
</div>
</template>
<script>
import { onMounted, ref } from 'vue';
import XLSX from 'xlsx';
import html2canvas from 'html2canvas';
export default {
setup() {
const fileInput = ref(null);
const file = ref(null);
const worksheet = ref(null);
const workbook = ref(null);
const data = ref([]);
const pageHeight = ref(595); // A4 paper size in mm (210mm x 297mm)
const pageWidth = ref(842); // A4 paper size in mm (210mm x 297mm)
const pageCount = ref(0);
const pageData = ref([]);
const pdfData = ref([]);
const canvasRef = ref(null);
const pdfRef = ref(null);
const pdfWriter = ref(null);
const pdfDocument = ref(null);
const canvasToPdf = (canvas) => {
pdfWriter.value.addPage({ data: DataURL('image/png') });
return pdfWriter.value.saveAs();
};
const convertToPdf = async () => {
if (file.value) {
workbook.value = adFile(file.value);
worksheet.value = workbook.value.Sheets[workbook.value.SheetNames[0]];
data.value = XLSX.utils.sheet_to_json(worksheet.value, { header: 1 });
pageCount.value = il(data.value.length / 100); // Adjust page count based on the number of rows in the Excel file
for (let i = 0; i < pageCount.value; i++) {
pageData.value[i] = data.value.slice((i * 100), (i * 100) + 100); // Extract data for each page (100 rows per page)pageData.value[i].forEach((row, index) => {
htmlContent += `<tr>${row.join('</td><td>')}</tr>`; // Convert data to HTML table format for each page
});
htmlContent += '</table>';
canvasRef.value = ateElement('div'); // Create a temporary div element to render the HTML content as canvas
canvasRef.value.innerHTML = htmlContent; // Set the HTML content of the div element to the table with the data for each page
await html2canvas(canvasRef.value, { scaleFactor: 2 }); // Convert the div element to canvas using html2canvas library with a scale factor of 2 for better quality rendering
pdfData.value[i] = DataURL('image/png'); // Convert the canvas to a PNG image and store it in the pdfData array for each page
}
pdfDocument.value = new jsPDF('', 'pt', 'a4'); // Create a new PDF document object with A4 paper size and portrait orientation
for (let i = 0; i < pageCount.value; i++) {
pdfDocument.value.addImage(pdfData.value[i], 'PNG', 0, 0, pageWidth.value, pageHeight.value); // Add each page to the PDF document using the corresponding canvas image and adjust the position and size accordingly for each page
}
pdfRef.value = pdfDocument.value; // Store the PDF document object in the pdfRef reactive reference for further usage (e.g., downloading the PDF)
} else {
alert('Please select an Excel file');
}
};
return { fileInput, file, worksheet, workbook, data, pageHeight, pageWidth, pageCount, pageData, pdfData, canvasRef, pdfRef, pdfWriter, pdfDocument, convertToPdf };
},
};
</script>

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