When you work with Excel worksheets on a daily basis, you sometimes need to convert them to images for storage or preventing data from being changed when shared with others. This article will show you how to convert a whole Excel worksheet or a specific cell range to an image using Spire.XLS for Java.
Install Spire.XLS for Java
First of all, you're required to add the Spire.Xls.jar file as a dependency in your Java program. The JAR file can be downloaded from this link. If you use Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file.
<repositories> <repository> <id>com.e-iceblue</id> <name>e-iceblue</name> <url>https://repo.e-iceblue.com/nexus/content/groups/public/</url> </repository> </repositories> <dependencies> <dependency> <groupId>e-iceblue</groupId> <artifactId>spire.xls</artifactId> <version>14.11.0</version> </dependency> </dependencies>
Convert a Whole Excel Worksheet to Image
The following steps will demonstrate how to convert a whole Excel worksheet to an image.
- Create a Workbook instance.
- Load a sample Excel document using Workbook.loadFromFile() method.
- Get a specific worksheet of the document using Workbook.getWorksheets().get() method.
- Convert the worksheet to an image using Worksheet.saveToImage() method.
- Java
import com.spire.xls.*; public class ExcelToImage { public static void main(String[] args){ //Create a workbook instance Workbook workbook = new Workbook(); //Load a sample Excel document workbook.loadFromFile("C:\\Users\\Test1\\Desktop\\sample.xlsx"); //Get the first worksheet Worksheet sheet = workbook.getWorksheets().get(0); //Save the sheet to an image sheet.saveToImage("output/SheetToImage.png"); } }
Convert a Specific Cell Range to Image
Spire.XLS for Java supports converting a specific cell range to an image by using the Worksheet.toImage (int firstRow,int firstColumn,int lastRow,int lastColumn) method. Detailed steps are listed below.
- Create a Workbook instance.
- Load a sample Excel document using Workbook.loadFromFile() method.
- Get a specific worksheet of the document using Workbook.getWorksheets().get() method.
- Create a BufferedImage instance.
- Convert a specific cell range to the ButteredImage object using Worksheet.toImage () method.
- Save the BufferedImage object to a .png image.
- Java
import com.spire.xls.Workbook; import com.spire.xls.Worksheet; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.*; public class SpecificCellsToImage { public static void main(String[] args) throws IOException { //Create a workbook instance Workbook workbook = new Workbook(); //Load a sample Excel document workbook.loadFromFile("C:\\Users\\Test1\\Desktop\\sample.xlsx"); //Get the first worksheet Worksheet sheet = workbook.getWorksheets().get(0); //Convert a specific cell range to the BufferedImage object BufferedImage bufferedImage = sheet.toImage(1, 1, 7, 4); //Save as a .png image ImageIO.write(bufferedImage,"PNG",new File("output/specificCellsToImage.png")); } }
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