使用JBarcode生成一维码

需要的jar包，只有jbarcode.jar

链接: https://pan.baidu.com/s/1o9oDPB8 密码: x367

public class Main {

    //设置条形码高度    
    private static final int BARCODE_HEIGHT = 40;    
    //设置条形码默认分辨率    
    private static final int BARCODE_DPI = ImageUtil.DEFAULT_DPI;    
    //设置条形码字体样式    
    private static final String FONT_FAMILY = "console";    
    //设置条形码字体大小    
    private static final int FONT_SIZE = 15;    
    //设置条形码文本    
    public static String TEXT = "";    
    //创建jbarcode    
    private static JBarcode jbc = null;    
    
    public static void main(String[] args) {
        List<String> list=new ArrayList<String>();    
        list.add("KJ4.1-0127-0001");    
        list.add("KJ4.1-0128-0001");    
        list.add("KJ4.1-0129-0001");    
        list.add("KJ4.1-0130-0001");    
        if(list!=null && list.size()>0){    
            for(String message:list){    
                Main.createBarcode(message, new File("D:\\test\\"+message+".png"),"No");    
            }    
        }       
    }
    
    public static JBarcode getJBarcode() throws InvalidAtributeException {    
        /**  
        * 参考设置样式：  
        *barcode.setEncoder(Code128Encoder.getInstance()); //设置编码 
        *barcode.setPainter(WidthCodedPainter.getInstance());// 设置Painter 
        *barcode.setTextPainter(BaseLineTextPainter.getInstance()); //设置TextPainter 
        *barcode.setBarHeight(17); //设置高度 
        *barcode.setWideRatio(Double.valueOf(30).doubleValue());// 设置宽度比率 
        *barcode.setXDimension(Double.valueOf(2).doubleValue()); // 设置尺寸，大小 密集程度 
        *barcode.setShowText(true); //是否显示文本 
         *barcode.setCheckDigit(true); //是否检查数字 
        *barcode.setShowCheckDigit(false); //是否显示检查数字 
       */    
       if (jbc == null) {    
           //生成code128    
           jbc = JBarcodeFactory.getInstance().createCode128();   
           jbc.setEncoder(Code128Encoder.getInstance());    
           jbc.setTextPainter(CustomTextPainter.getInstance());    
           jbc.setBarHeight(BARCODE_HEIGHT);    
           jbc.setXDimension(Double.valueOf(0.8).doubleValue());  
           jbc.setShowText(true);    
       }    
       return jbc;    
       }    
       
       /**  
        * @descript:生成条形码文件  
        * @param message  条形码内容  
        * @param file   生成文件  
        */    
       public static void createBarcode(String message, File file,String text) {    
           try {    
               FileOutputStream fos = new FileOutputStream(file);    
               createBarcode(message, fos,text);    
               fos.close();    
           } catch (IOException e) {    
               throw new RuntimeException(e);    
           }    
       }    
       
       /**  
        * @descript:生成条形码并写入指定输出流  
        * @param message   条形码内容  
        * @param os   输出流  
        */    
       public static void createBarcode(String message, OutputStream os,String text) {    
           try {    
               //设置条形码文本  
               TEXT=text;  
               //创建条形码的BufferedImage图像    
               BufferedImage image = getJBarcode().createBarcode(message);    
               ImageUtil.encodeAndWrite(image, ImageUtil.PNG, os, BARCODE_DPI, BARCODE_DPI);    
               os.flush();    
           } catch (Exception e) {    
               throw new RuntimeException(e);    
           }    
       }    
       
       /**  
        * 静态内部类  
        * 自定义的 TextPainter， 允许定义字体，大小，文本等  
        * 参考底层实现：BaseLineTextPainter.getInstance()  
        */    
       protected static class CustomTextPainter implements TextPainter {    
          private static CustomTextPainter instance =new CustomTextPainter();    
          public static CustomTextPainter getInstance() {    
               return instance;    
          }    
          public void paintText(BufferedImage barCodeImage, String text, int width) {    
               //绘图    
               Graphics g2d = barCodeImage.getGraphics();    
               //创建字体    
               Font font = new Font(FONT_FAMILY, Font.PLAIN, FONT_SIZE * width);    
               g2d.setFont(font);    
               FontMetrics fm = g2d.getFontMetrics();    
               int height = fm.getHeight();    
               int center = (barCodeImage.getWidth() - fm.stringWidth(text)) / 2;    
               g2d.setColor(Color.WHITE);    
               g2d.fillRect(0, 0, barCodeImage.getWidth(), barCodeImage.getHeight() * 1 / 20);    
               g2d.fillRect(0, barCodeImage.getHeight() - (height * 9 / 10), barCodeImage.getWidth(), (height * 9 / 10));    
               g2d.setColor(Color.BLACK);    
               //绘制文本    
               g2d.drawString(TEXT, 0, 145);    
               //绘制条形码    
               g2d.drawString(text, center, barCodeImage.getHeight() - (height / 10) - 2);    
           }    
       }    
    
}