Add Borders to Cells in Excel Using Java

This article will introduce how to add borders to cells in an Excel file using a 3rd party free library.

Installation (2 Method)
1# Download the free library (Free Spire.XLS for Java) and unzip it, then add the Spire.Xls.jar file to your project as dependency.
2# You can also add the jar dependency to maven project by adding the following configurations to the pom.xml.

<repositories>
        <repository>
            <id>com.e-iceblue</id>
            <name>e-iceblue</name>
            <url>http://repo.e-iceblue.com/nexus/content/groups/public/</url>
        </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.xls.free</artifactId>
        <version>3.9.1</version>
    </dependency>
</dependencies>

Sample Code

import com.spire.xls.*;
import java.awt.*;

public class AddBorders {
    public static void main(String[] args){
        //Create a workbook instance
        Workbook workbook = new Workbook();
        //Load the Excel file
        workbook.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.xlsx");

        //Get the first worksheet
        Worksheet sheet = workbook.getWorksheets().get(0);

        //Get the cell range that you want to apply border style
        CellRange cr = sheet.getCellRange(sheet.getFirstRow(), sheet.getFirstColumn(), sheet.getLastRow(), sheet.getLastColumn());

        //Apply border style
        cr.getBorders().setLineStyle(LineStyleType.Double);
        cr.getBorders().getByBordersLineType(BordersLineType.DiagonalDown).setLineStyle(LineStyleType.None);
        cr.getBorders().getByBordersLineType(BordersLineType.DiagonalUp).setLineStyle(LineStyleType.None);
        cr.getBorders().setColor(Color.BLUE);

        //Save the resultant file
        workbook.saveToFile("SetBorder.xlsx", ExcelVersion.Version2010);
    }
}

Before

After