应用场景:
客户在创建前后端分离的应用时,前端只用于做一些基本的数据展示,如果涉及大量的数据或报表生成,建议放在服务器端展示,本文主要分享如何在服务器端使用ActiveReportsJS 实现报表导出PDF功能
Demo下载
运行Demo
- npm install
- node index.js
复制代码
环境准备:
node.js v14.15.0+Headless 无头浏览器
操作步骤:
1. 添加资源文件
2. 配置资源和文件
- const puppeteer = require('puppeteer');
- const fs = require('fs');
- var static = require('node-static');
- var http = require('http');
- var file = new(static.Server)(__dirname + '/resources');
- http.createServer(function (req, res) {
- file.serve(req, res);
- }).listen(9999);
- const fonts = [
- {
- name: 'Montserrat',
- source: 'Montserrat-Regular.ttf'
- },
- {
- name: 'Montserrat',
- source: 'Montserrat-Medium.ttf',
- weight: 500
- }
- ];
复制代码 3. 调用浏览器并初始化 调用ARJS 导出PDF文件
- (async () => {
- const browser = await puppeteer.launch({headless: true});
- const page = await browser.newPage();
- await page.goto(`http://localhost:9999/host.html`);
- //await page.goto(`${__dirname}/resources/host.html`);
- const pdfString =await page.evaluate(({reportUrl, fonts}) =>
- new Promise(async (resolve, reject) => {
- // await GC.ActiveReports.Core.FontStore.registerFonts(fonts);
- const report = new GC.ActiveReports.Core.PageReport();
- await report.load(reportUrl);
- const doc = await report.run();
- const result = await GC.ActiveReports.PdfExport.exportDocument(doc, {fonts: fonts, info: {author: 'GrapeCity'}});
- const reader = new FileReader();
- reader.readAsBinaryString(result.data);
- reader.onload = () => resolve(reader.result);
- reader.onerror = () => reject('Error occurred while reading binary string');
- }), {reportUrl: 'SimpleTable.rdlx-json', fonts: fonts});
- const pdfData = Buffer.from(pdfString, 'binary');
- fs.writeFileSync(`${__dirname}/out115.pdf`, pdfData);
- console.log('done');
- process.exit(0);
- })();
复制代码
|