How to Read Dynamically Changing Values from an Excel Sheet in Java Without Saving the File

What are the steps to read dynamic values from an Excel sheet using Java without saving changes?

None

Reading dynamically changing values from an Excel sheet in Java without saving involves utilizing libraries that can handle Excel formats, like Apache POI or JExcelApi. These libraries allow you to interact with Excel files stored in memory or on disk without modifying the original file unless explicitly saved.

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelReader {
    public static void main(String[] args) throws Exception {
        // Open Excel file
        Workbook workbook = new XSSFWorkbook("path_to_your_file.xlsx");
        Sheet sheet = workbook.getSheetAt(0);

        // Access a dynamic cell value
        Row row = sheet.getRow(0);
        Cell cell = row.getCell(0);
        System.out.println("Value: " + cell.toString());

        // Closing the workbook (not saving)
        workbook.close();
    }
}

Causes

• The need to access real-time data from an Excel file without making permanent changes.
• The challenge of ensuring the data read is into a Java application efficiently and accurately.

Solutions

• Use Apache POI library to read from Excel sheets and extract values on the fly.
• Implement JExcelApi for handling Excel files without saving the state of the original file.

Mistake: Failing to close the Workbook after reading.

Solution: Always call the workbook.close() method to release resources.

Mistake: Using outdated versions of libraries that don’t support .xlsx files.

Solution: Ensure you are using the correct version of Apache POI that supports the latest Excel formats.