一、概述

可用barcode4j或zxing等第三方庫，推薦zxing。

barcode4j資料鏈接：http://barcode4j.sourceforge.net/

zxing資料鏈接：https://github.com/zxing/zxing

二、barcode4j

關鍵代碼：

DataMatrixBean bean = new DataMatrixBean();
final int dpi = 800;
String format = "image/png";
ByteArrayOutputStream ous = new ByteArrayOutputStream();
BitmapCanvasProvider canvas 
 
= new BitmapCanvasProvider(ous, format, dpi,BufferedImage.TYPE_BYTE_BINARY, false, 0); 
bean.generateBarcode(canvas, info);
canvas.finish(); 

支持的條碼格式有：

• Interleaved 2 of 5
• ITF-14
• Code 39
• Code 128
• EAN-128, GS1-128 (based on Code 128)
• Codabar
• UPC-A and UPC-E (with supplementals)
• EAN-13 and EAN-8 (with supplementals)
• POSTNET
• Royal Mail Customer Barcode (Four State)
• USPS Intelligent Mail (4-State Customer Barcode)

支持的二維碼格式有：

• PDF 417 (ISO/IEC 15438:2001(E))
• DataMatrix (ISO/IEC 16022:2000(E))
• QR Code (ISO/IEC 18004:2006(E)) (requires ZXing, available from CVS HEAD only)

可輸出文件類型為：

• SVG
• EPS (Encapsulated PostScript)
• Bitmap images (such as PNG or JPEG)
• Java2D (AWT)
• Text (for testing and debugging only)

Java生成條碼二維碼