条码技术在现在的应用非常广泛，几乎所有的商品包装上都会印有条形码，这一篇将通过实例演示JAVA如何生成条码，需要使用的第三方包为：jbarcode

import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import org.jbarcode.JBarcode;import org.jbarcode.encode.CodabarEncoder;import org.jbarcode.encode.Code11Encoder;import org.jbarcode.encode.Code128Encoder;import org.jbarcode.encode.Code39Encoder;import org.jbarcode.encode.Code39ExtEncoder;import org.jbarcode.encode.Code93Encoder;import org.jbarcode.encode.Code93ExtEncoder;import org.jbarcode.encode.EAN13Encoder;import org.jbarcode.encode.EAN8Encoder;import org.jbarcode.encode.Interleaved2of5Encoder;import org.jbarcode.encode.InvalidAtributeException;import org.jbarcode.encode.MSIPlesseyEncoder;import org.jbarcode.encode.PostNetEncoder;import org.jbarcode.encode.Standard2of5Encoder;import org.jbarcode.encode.UPCAEncoder;import org.jbarcode.encode.UPCEEncoder;import org.jbarcode.paint.BaseLineTextPainter;import org.jbarcode.paint.EAN13TextPainter;import org.jbarcode.paint.EAN8TextPainter;import org.jbarcode.paint.HeightCodedPainter;import org.jbarcode.paint.UPCATextPainter;import org.jbarcode.paint.UPCETextPainter;import org.jbarcode.paint.WideRatioCodedPainter;import org.jbarcode.paint.WidthCodedPainter;/** * 条形码创建，需添加jar包：jbarcode-0.2.8.jar *  * @author jianggujin *  */public class BarcodeCreater{
        /** 用于生成条形码的对象 **/   private JBarcode barcode = null;   /**    * 构造方法    */   public BarcodeCreater()   {      barcode = new JBarcode(EAN13Encoder.getInstance(),            WidthCodedPainter.getInstance(), EAN13TextPainter.getInstance());      barcode.setBarHeight(17);      barcode.setShowText(true);      barcode.setCheckDigit(true);      barcode.setShowCheckDigit(true);   }   /**    * 生成条形码文件    *     * @param code    *           条形码内容    * @param file    *           生成文件    * @throws InvalidAtributeException    * @throws IOException    */   public void write(String code, File file) throws IOException,         InvalidAtributeException   {      ImageIO.write(toBufferedImage(code), "JPEG", file);   }   /**    * 生成条形码并写入指定输出流    *     * @param code    *           条形码内容    * @param os    *           输出流    * @throws IOException    * @throws InvalidAtributeException    */   public void write(String code, OutputStream os) throws IOException,         InvalidAtributeException   {      ImageIO.write(toBufferedImage(code), "JPEG", os);   }   /**    * 创建条形码的BufferedImage图像    *     * @param code    *           条形码内容    * @return image    * @throws InvalidAtributeException    */   public BufferedImage toBufferedImage(String code)         throws InvalidAtributeException   {      return barcode.createBarcode(code);   }   /**    * 设置编码    *     * @param encoder    */   public void setEncoder(BarcodeEncoder encoder)   {      int val = encoder.ordinal();      switch (val)      {      case 0:         barcode.setEncoder(EAN13Encoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(EAN13TextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 1:         barcode.setEncoder(UPCAEncoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(UPCATextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 2:         barcode.setEncoder(EAN8Encoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(EAN8TextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 3:         barcode.setEncoder(UPCEEncoder.getInstance());         barcode.setTextPainter(UPCETextPainter.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 4:         barcode.setEncoder(CodabarEncoder.getInstance());         barcode.setPainter(WideRatioCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 5:         barcode.setEncoder(Code11Encoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 6:         barcode.setEncoder(Code39Encoder.getInstance());         barcode.setPainter(WideRatioCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(false);         barcode.setShowCheckDigit(false);         break;      case 7:         barcode.setEncoder(Code39ExtEncoder.getInstance());         barcode.setPainter(WideRatioCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(false);         barcode.setShowCheckDigit(false);         break;      case 8:         barcode.setEncoder(Code93Encoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(false);         break;      case 9:         barcode.setEncoder(Code93ExtEncoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(false);         break;      case 10:         barcode.setEncoder(Code128Encoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(false);         break;      case 11:         barcode.setEncoder(MSIPlesseyEncoder.getInstance());         barcode.setPainter(WidthCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 12:         barcode.setEncoder(Standard2of5Encoder.getInstance());         barcode.setPainter(WideRatioCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(false);         break;      case 13:         barcode.setEncoder(Interleaved2of5Encoder.getInstance());         barcode.setPainter(WideRatioCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(17);         barcode.setShowText(true);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(true);         break;      case 14:         barcode.setEncoder(PostNetEncoder.getInstance());         barcode.setPainter(HeightCodedPainter.getInstance());         barcode.setTextPainter(BaseLineTextPainter.getInstance());         barcode.setBarHeight(6);         barcode.setShowText(false);         barcode.setCheckDigit(true);         barcode.setShowCheckDigit(false);         break;      }   }   /**    * 条形码编码方式    *     * @author jianggujin    *     */   public enum BarcodeEncoder   {      EAN13, UPCA, EAN8, UPCE, Codabar, Code11, Code39, Code39Ext, Code93, Code93Ext, Code128, MSIPlessey, Standard2of5, Interleaved2of5, PostNet   }}