Java Servlet Barcode Generation Tutorial

   import com.onbarcode.barcode.AbstractBarcode; 
   import com.onbarcode.barcode.Code128; 
   import javax.servlet.http.HttpServlet; 
   import javax.servlet.http.HttpServletRequest; 
   import javax.servlet.http.HttpServletResponse; 
   import javax.servlet.ServletException; 
   import javax.servlet.ServletOutputStream; 
   
   public class BarcodeServlet extends HttpServlet 
   { 
       public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException 
       { 
           try { 
               Code128 barcode = new Code128(); 
               barcode.setData("0123456789"); 
    
               // Basic barcode size settings here
               barcode.setX(2);
               barcode.setY(60);
               barcode.setLeftMargin(8);
               barcode.setRightMargin(8); 

               //Customize barcode image format into Gif(0), Jpeg(1), and Png(3)
               barcode.setImageFormat(0)
            
               // Set generated barcode image resolution
               barcode.setResolution(96);

               // Set barcode rotation rate. 0 degree(0), 90 degree(1), 180 degree(2), 270 degree(3)
               barcode.setRotate(0);
                 

               ServletOutputStream servletoutputstream = response.getOutputStream(); 
              
               response.setContentType("image/jpeg"); 
               response.setHeader("Pragma", "no-cache"); 
               response.setHeader("Cache-Control", "no-cache"); 
               response.setDateHeader("Expires", 0); 
           
               // Generate Code-128 barcode & output to ServletOutputStream
               barcode.drawBarcode(servletoutputstream); 
      
           } catch (Exception e) { 
               throw new ServletException(e); 
           } 
       } 
}