Java打印小票

首先我用Java代码实现： 

 
    public static BufferedImage payPrting(PayPrintParam payPrintParam) throws Exception {
        //1.画布
        BufferedImage bi = new BufferedImage(300, 400, BufferedImage.TYPE_BYTE_GRAY);

        //2.画笔
        Graphics2D g2d = bi.createGraphics();
        g2d.setBackground(Color.WHITE);//设置背景色
        g2d.clearRect(0, 0, 300, 400);//通过使用当前绘图表面的背景色进行填充来清除指定的矩形
        //2.4重设透明度，开始画图
        //g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1));
        //2.5设置画笔颜色
        g2d.setPaint( Color.BLACK);
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("凤梨一号自助机缴费凭条", 30, 20);
        g2d.drawString("---------------------------------------", 7, 45);
        g2d.setFont(new Font("Default", Font.PLAIN, 18));
        Map map = payPrintParam.getMap();
        Integer y=75;
        for (String s : map.keySet()) {
            g2d.drawString(s+"：" + String.valueOf(map.get(s)), 5, y);
            y+=30;
        }
        if(payPrintParam.getFoot()!=null){
            g2d.setFont(new Font("Default", Font.PLAIN, 20));
            g2d.drawString("---------------------------------------", 7, y);
           // g2d.drawString(payPrintParam.getFoot(), 5, y+30);
            String[] fontTexts = payPrintParam.getFoot().split("n");
            if(fontTexts.length>1){
                for (String fontText : fontTexts) {
                    y=y+30;
                    g2d.drawString(fontText, 5, y);
                }
            }else{
                g2d.drawString(payPrintParam.getFoot(), 5, y+30);
            }


        }

        g2d.dispose();
        return bi;
    }

   
    public static byte[] buildBytesbmp(BufferedImage image) throws Exception {

        try (ByteArrayOutputStream outStream = new ByteArrayOutputStream()) {
            //bufferedImage转为byte数组
            ImageIO.write(image, "png", outStream);
            return outStream.toByteArray();
        }
    }

  
    private static void storeBytes(byte[] buf, String fullPath) throws IOException {

        File file = new File(fullPath);
        try (FileOutputStream fos = new FileOutputStream(file);
                BufferedOutputStream bos = new BufferedOutputStream(fos)) {

            //1.如果父目录不存在，则创建
            File dir = file.getParentFile();
            if (!dir.exists()) {
                dir.mkdirs();
            }

            //2.写byte数组到文件
            bos.write(buf);
        }
    }

    
    public static void buildAndSmallTicket(PayPrintParam payPrintParam, String fullPath) throws Exception {
        storeBytes(buildBytesbmp(payPrting(payPrintParam)), fullPath);
    }

设置图片头信息,图片位数,通过 x,y设置图片样式,通过ImageIO.write(image, "png", outStream);将BufferedImage 转换为baty数组再用BufferedOutputStream将数组写入文件