HTML table data into Excel cell usin POI java

Question

Can you please let me know how can we render the html table data into Excel cell using Apache POI in java. I have the below requirement like..

<table border="1" cellpadding="1" cellspacing="1" style="width:500px;">
<tbody>
<tr>
<td>details</td>
<td>testing</td>
</tr>
<tr><td>1</td>
<td>220</td>
</tr>
<tr><td>3</td>
<td>4</td>
<td>10</td>
</tr></tbody>
</table>

but its just coming as text string.. enter image description here

Answer 1

Here basically you need to parse and convert HTML to data rows and then finally write to excel. I will show you how to do it using Gradle, Jsoup and apache poi

You need following dependency in your build.gradle

    implementation 'org.apache.poi:poi:3.15'
    implementation 'org.apache.poi:poi-ooxml:3.15'
    implementation group: 'org.jsoup', name: 'jsoup', version: '1.11.3'

And here is the code to convert and write to excel

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Test {

    public static void main(String[] args) throws IOException {
        //HTML to Data
        String data = "<table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"width:500px;\">\n" +
            "<tbody>\n" +
            "<tr>\n" +
            "<td>details</td>\n" +
            "<td>testing</td>\n" +
            "</tr>\n" +
            "<tr><td>1</td>\n" +
            "<td>220</td>\n" +
            "</tr>\n" +
            "<tr><td>3</td>\n" +
            "<td>4</td>\n" +
            "<td>10</td>\n" +
            "</tr></tbody>\n" +
            "</table>";
        Document doc = Jsoup.parse(data);
        Element table = doc.select("table").get(0); //select the first table.
        Elements rows = table.select("tr");
        Element headerRow = rows.get(0);
        List<String> headers = new ArrayList<>();
        List<List<String>> dataRows = new ArrayList<>();
        Elements headerColumns = headerRow.select("td");
        for (int l = 0; l < headerColumns.size(); l++) {
            headers.add(headerColumns.get(l).text());
        }
        System.out.println(headers);
        for (int i = 1; i < rows.size(); i++) {
            Element row = rows.get(i);
            Elements cols = row.select("td");
            List<String> dataRow = new ArrayList<>();
            for (int j = 0; j < cols.size(); j++) {
                dataRow.add(cols.get(j).text());
            }
            dataRows.add(dataRow);
        }
        //Data to excel
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet("data");
        Row header = sheet.createRow(0);
        for (int k = 0; k < headers.size(); k++) {
            Cell headerCell = header.createCell(k);
            headerCell.setCellValue(headers.get(k));
        }

        for (int i = 0; i < dataRows.size(); i++) {
            Row r = sheet.createRow(i + 1);
            List<String> d = dataRows.get(i);
            for (int j = 0; j < d.size(); j++) {
                Cell dataCell = r.createCell(j);
                dataCell.setCellValue(d.get(j));
           }
        }

        File currDir = new File(".");
        String path = currDir.getAbsolutePath();
        String fileLocation = path.substring(0, path.length() - 1) + "Data.xlsx";

        FileOutputStream outputStream = new FileOutputStream(fileLocation);
        workbook.write(outputStream);
        workbook.close();
    }

}