A barcode, consisting of bars and spaces (or dots), is a machine-readable representation of numerals and characters. Today, barcodes have been widely used in grocery stores, doctor offices, law firms, post offices, retail stores and countless others. Being able to read Code39, Code128, PDF417, DataMatrix, QR, and other barcodes from various kinds of documents (like Word, Excel, PowerPoint and PDF) can be a real benefit.
In this article, I am going to introduce how to read barcodes from MS Office documents and PDFs in Java using Spire.Office for Java. More than 40+ commonly seen 1D or 2D barcode types are supported by this library.
- Read Barcode from Word in Java
- Read Barcode from Excel in Java
- Read Barcode from PowerPoint in Java
- Read Barcode from PDF in Java
Add Spire.Offfice.jar as Dependency
If you are working on a maven project, you can include the dependency in pom.xml file using this:
<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.office</artifactId>
<version>7.12.4</version>
</dependency>
</dependencies>
If you are not using maven, then you can find the required jar files from the zip file available in this location. Include all the jar files into the application lib folder to run the sample code given in this tutorial.
Read Barcode from Word in Java
The following are the steps to read barcodes from a specific page of a Word file using Spire.Office for Java.
- Create a Document object.
- Load a sample Word file containing barcodes using Document.loadFromFile() method.
- Convert the first page into image using Document.saveToImages(int pageIndex, ImageType type) method.
- Scan barcodes from the image using BarcodeScanner.scan() method and return results in a String array.
import com.spire.barcode.BarcodeScanner;
import com.spire.doc.Document;
import com.spire.doc.documents.ImageType;
import java.awt.image.BufferedImage;
public class ReadBarcodeFromWord {
public static void main(String[] args) {
//Create a Document object
Document doc = new Document();
//Load a sample Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Invoice.docx");
//Convert the first page to image
BufferedImage image = doc.saveToImages(0, ImageType.Bitmap);
//Scan barcode from the image
String[] data = BarcodeScanner.scan(image);
//Print out the result
for (int i = 0; i < data.length; i++)
{
System.out.println(data[i]);
}
}
}
Read Barcode from Excel in Java
Below are the steps to read barcodes from a worksheet using Spire.Office for Java.
- Create a Workbook object.
- Load a sample Excel file containing barcodes using Workbook.loadFromFile() method.
- Get the first worksheet using Workbook.getWorksheets().get() method.
- Convert the selected range of the worksheet into image using XlsWorksheet.saveToImage(int firstRow, int firstColumn, int lastRow, int lastColumn) method.
- Scan barcodes from the image using BarcodeScanner.scan() method and return results in a String array.
import com.spire.barcode.BarcodeScanner;
import com.spire.xls.CellRange;
import com.spire.xls.Workbook;
import com.spire.xls.Worksheet;
import java.awt.image.BufferedImage;
public class ReadBarcodeFromExcel {
public static void main(String[] args) {
//Create a Workbook object
Workbook wb = new Workbook();
//Load a sample Excel file
wb.loadFromFile("C:\\Users\\Administrator\\Desktop\\Invoice.xlsx");
//Get the first worksheet
Worksheet sheet = wb.getWorksheets().get(0);
//Get all located range from the first worksheet
CellRange cellRange = sheet.getAllocatedRange();
//Convert the range to image
BufferedImage image = sheet.saveToImage(1,1,cellRange.getLastRow(),cellRange.getLastColumn());
//Scan barcode from the image
String[] data = BarcodeScanner.scan(image);
//Print out the result
for (int i = 0; i < data.length; i++)
{
System.out.println(data[i]);
}
}
}
Read Barcode from PowerPoint in Java
The steps to read barcodes from a PowerPoint slide are as follows.
- Create a Presentation object.
- Load a sample PowerPoint file using Presentation.loadFromFile() method.
- Get the first slide using Presentation.getSlides().get() method.
- Convert the slide into image using ISlide.savAsImage() method.
- Scan barcodes from the image using BarcodeScanner.scan() method and return results in a String array.
import com.spire.barcode.BarcodeScanner;
import com.spire.presentation.ISlide;
import com.spire.presentation.Presentation;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class ReadBarcodeFromPowerPoint {
public static void main(String[] args) throws Exception {
//Create a Presentation object
Presentation presentation = new Presentation();
//Load a sample PowerPoint file
presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\Invoice.pptx");
//Get the first slide
ISlide slide = presentation.getSlides().get(0);
//Save the first slide as image
BufferedImage image = slide.saveAsImage();
//Convert image to stream
InputStream imageStream = bufferedImageToInputStream(image);
//Scan barcode from the image stream
String[] data = BarcodeScanner.scan(imageStream);
//Print out the result
for (int i = 0; i < data.length; i++) {
System.out.println(data[i]);
}
}
public static InputStream bufferedImageToInputStream(BufferedImage image) throws IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
ImageIO.write(image, "png", os);
InputStream input = new ByteArrayInputStream(os.toByteArray());
return input;
}
}
Read Barcode from PDF in Java
The following are the steps to read barcodes from a PDF page using Spire.Office for Java.
- Create a PdfDocument object.
- Load a sample PDF file using PdfDocument.loadFromFile() method.
- Convert the first page into image using PdfDocument.saveAsImage(int pageIndex, PdfImageType type) method.
- Scan barcodes from the image using BarcodeScanner.scan() method and return results in a String array.
import com.spire.barcode.BarcodeScanner;
import com.spire.license.LicenseProvider;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.graphics.PdfImageType;
import java.awt.image.BufferedImage;
public class ReadBarcodeFromPdf {
public static void main(String[] args) {
//Create a PdfDocument object
PdfDocument doc = new PdfDocument();
//Load a sample PDF file
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Invoice.pdf");
//Convert the first page to image
BufferedImage image = doc.saveAsImage(0, PdfImageType.Bitmap);
//Scan barcode from the image
String[] data = BarcodeScanner.scan(image);
//Print out the result
for (int i = 0; i < data.length; i++)
{
System.out.println(data[i]);
}
}
}
Note:
If you get a message which reads “Not supported in Spire.Barcode Evaluation version”, it means that a specific barcode type cannot be recognized without a license. You can apply for a one-month temporary from E-iceblue to get rid of the limitation.
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