方法一：jspdf+html2canvas
1.首先安装jspdf，html2canvas
2.在utils下新建htmlToPdf.js
import html2canvas from 'html2canvas';
import JsPDF from 'jspdf';/*** @param ele 要生成 pdf 的DOM元素（容器）* @param padfName PDF文件生成后的文件名字* */function downloadPDF(ele, pdfName) {console.log(ele)let eleW = ele.offsetWidth;// 获得该容器的宽let eleH = ele.offsetHeight;// 获得该容器的高let eleOffsetTop = ele.offsetTop; // 获得该容器到文档顶部的距离let eleOffsetLeft = ele.offsetLeft; // 获得该容器到文档最左的距离var canvas = document.createElement("canvas");var abs = 0;let win_in = document.documentElement.clientWidth || document.body.clientWidth; // 获得当前可视窗口的宽度（不包含滚动条）let win_out = window.innerWidth; // 获得当前窗口的宽度（包含滚动条）if(win_out>win_in){// abs = (win_o - win_i)/2; // 获得滚动条长度的一半abs = (win_out - win_in)/2; // 获得滚动条宽度的一半// console.log(a, '新abs');}canvas.width = eleW * 2; // 将画布宽&&高放大两倍canvas.height = eleH * 2;var context = canvas.getContext("2d");context.scale(2, 2);context.translate(-eleOffsetLeft -abs, -eleOffsetTop);html2canvas( ele, {dpi: 300,allowTaint: true,// allowTaint: true, //允许 canvas 污染， allowTaint参数要去掉，否则是无法通过toDataURL导出canvas数据的useCORS:true //允许canvas画布内 可以跨域请求外部链接图片, 允许跨域请求。} ).then( (canvas)=>{var contentWidth = canvas.width;var contentHeight = canvas.height;//一页pdf显示html页面生成的canvas高度;var pageHeight = contentWidth / 592.28 * 841.89;//未生成pdf的html页面高度var leftHeight = contentHeight;//页面偏移var position = 0;//a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高var imgWidth = 595.28;var imgHeight = 595.28/contentWidth * contentHeight;var pageData = canvas.toDataURL('image/jpeg', 1.0);// let pageData = new Image();//设置图片跨域访问pageData.setAttribute('crossOrigin', 'Anonymous');var pdf = new JsPDF('', 'pt', 'a4');//有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)//当内容未超过pdf一页显示的范围，无需分页if (leftHeight < pageHeight) {//在pdf.addImage(pageData, 'JPEG', 左，上，宽度，高度)设置在pdf中显示；pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight);// pdf.addImage(pageData, 'JPEG', 20, 40, imgWidth, imgHeight);} else { // 分页while(leftHeight > 0) {pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight);leftHeight -= pageHeight;position -= 841.89;//避免添加空白页if(leftHeight > 0) {pdf.addPage();}}}//可动态生成pdf.save(pdfName);})
}
export default {downloadPDF
}3.创建需要打印的pdf.vue
<template><div class="app-container pdf-container"><div class="btnPdf"><button @click="getpdf">导出</button></div><div id="report-continer"><div>需要打印的内容</div></div></div>
</template><script>
import htmlToPdf from '@/utils/htmlToPdf'
import '@/assets/styles/reports.scss'export default {name: 'getPdf',methods: {// pdf 导出getpdf() {htmlToPdf.downloadPDF(document.querySelector('#report-continer'), 'test')}}
}
</script><style lang="scss" scoped></style>
方法二：用window.print() 自带方法解决
window.print(); // 打印如果只有部分样式打印，续设置打印的样式
@media print{.noprint{ // 不用打印的部分，隐藏起来display:none;}.print{ // 需要打印的部分，显示display:block;}
}
