Copying a Varying Column Table in DOCX with Apache POI

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Question:

How to Copy a Varying Column Per Row Table and Place It Below the Original in a DOCX File Using Apache POI?

Answer:

To copy a varying column-per-row table and place it below the original in a DOCX file using Apache POI, you can follow these steps:

  1. Set Up Your Project: Ensure you have Apache POI dependencies in your project. If you're using Maven, you can add the following dependencies to your pom.xml:

    <dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.3</version> <!-- Check for the latest version -->
</dependency>
<dependency>
    <groupId>org.apache.xmlbeans</groupId>
    <artifactId>xmlbeans</artifactId>
    <version>5.0.2</version> <!-- Check for the latest version -->
</dependency>

  2. Read the Original Table: Load the DOCX file and read the original table.

  3. Create a New Table: Create a new table below the original one and copy the content from the original table to the new one.

  4. Save the Document: Finally, save the modified document.

Here is a sample code snippet demonstrating these steps:

import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFTable;
import org.apache.poi.xwpf.usermodel.XWPFTableRow;
import org.apache.poi.xwpf.usermodel.XWPFTableCell;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyTableExample {
    public static void main(String[] args) {
        String inputFilePath = "input.docx"; // Path to your input DOCX file
        String outputFilePath = "output.docx"; // Path to save the output DOCX file

        try (XWPFDocument document = new XWPFDocument(new FileInputStream(inputFilePath))) {
            // Assuming the first table is the one we want to copy
            XWPFTable originalTable = document.getTables().get(0);
            XWPFTable newTable = document.createTable();

            // Copy rows from the original table to the new table
            for (int i = 0; i < originalTable.getRows().size(); i++) {
                XWPFTableRow originalRow = originalTable.getRow(i);
                XWPFTableRow newRow = newTable.createRow();

                // Copy cells from the original row to the new row
                for (int j = 0; j < originalRow.getTableCells().size(); j++) {
                    XWPFTableCell originalCell = originalRow.getCell(j);
                    XWPFTableCell newCell = newRow.getCell(j);
                    newCell.setText(originalCell.getText());
                }
            }

            // Save the document
            try (FileOutputStream out = new FileOutputStream(outputFilePath)) {
                document.write(out);
            }

            System.out.println("Table copied successfully!");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Explanation of the Code:

  • Load the Document: The XWPFDocument class is used to load the DOCX file.
  • Get the Original Table: The first table in the document is accessed using document.getTables().get(0).
  • Create a New Table: A new table is created using document.createTable().
  • Copy Rows and Cells: Each row and its cells from the original table are copied to the new table.
  • Save the Document: The modified document is saved to a new file.

Note:

  • This code assumes that the original table is the first table in the document. You may need to adjust the index if you have multiple tables.
  • The code does not handle varying column counts per row. If your original table has rows with different numbers of columns, you will need to adjust the logic to handle that case, possibly by checking the number of cells in each row before copying.

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