如何在angular 9应用中集成tabula-js ?有没有其他方法可以从渲染的pdf中选择特定的部分并提取json中的数据？

npm install tabula-js

import * as tabula from 'tabula-js';

extractDataFromPDF(pdfPath: string) {
  tabula.read(pdfPath, { pages: 'all' })
    .then((data: any) => {
      console.log(data);
      // 在这里处理提取到的数据
    })
    .catch((error: any) => {
      console.error(error);
    });
}

<button (click)="extractDataFromPDF('path/to/pdf')">提取数据</button>

npm install pdfjs-dist

import * as pdfjsLib from 'pdfjs-dist';

extractDataFromPDF(pdfPath: string) {
  const loadingTask = pdfjsLib.getDocument(pdfPath);
  loadingTask.promise.then((pdf: any) => {
    const numPages = pdf.numPages;
    const promises = [];
    for (let i = 1; i <= numPages; i++) {
      promises.push(pdf.getPage(i));
    }
    Promise.all(promises)
      .then((pages: any) => {
        const extractedData = [];
        pages.forEach((page: any) => {
          page.getTextContent().then((textContent: any) => {
            const pageData = textContent.items.map((item: any) => item.str);
            extractedData.push(pageData);
          });
        });
        console.log(extractedData);
        // 在这里处理提取到的数据
      });
  })
  .catch((error: any) => {
    console.error(error);
  });
}

<button (click)="extractDataFromPDF('path/to/pdf')">提取数据</button>