使用java实现输出商品条码机商品数据信息

如图片所示

这里采用方案是：
1，使用jbarcode生成一维条码。（这里需要注意一点，jbc.setCheckDigit(false)不需要验校验位，不然会出现数据长度问题）
2，使用java程序生成上半部信息。
3，将图片进行拼接。
以下是代码：

package com.duduli.li;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import javax.imageio.ImageIO;

import org.jbarcode.JBarcode;
import org.jbarcode.JBarcodeFactory;
import org.jbarcode.encode.EAN13Encoder;
import org.jbarcode.encode.InvalidAtributeException;
import org.jbarcode.paint.TextPainter;
import org.jbarcode.util.ImageUtil;

public class BarcodeImageWithText {

	// 1，生成一维条码。
	private static final int BARCODE_HEIGHT = 20;
	private static final int BARCODE_DPI = ImageUtil.DEFAULT_DPI;
	private static final String FONT_FAMILY = "console";
	private static final int FONT_SIZE = 14;
	private static JBarcode jbc = null;

	static JBarcode getJBarcode() throws InvalidAtributeException {
		if (jbc == null) {
			jbc = JBarcodeFactory.getInstance().createEAN13();
			jbc.setEncoder(EAN13Encoder.getInstance());
			jbc.setTextPainter(CustomTextPainter.getInstance());
			jbc.setBarHeight(BARCODE_HEIGHT);
			jbc.setXDimension(Double.valueOf(0.4).doubleValue());
			jbc.setCheckDigit(false);// 对于固定条码的时候这里在条码中加入校验位，导致你写入13位提示14位
			jbc.setShowText(true);
		}
		return jbc;
	}

	public static void createBarcode(String message) {
		try {
			File file = new File("d:/" + message + ".png");
			FileOutputStream fos = new FileOutputStream(file);
			createBarcode(message, fos);
			fos.close();
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static void createBarcode(String message, OutputStream os) {
		try {
			BufferedImage image = getJBarcode().createBarcode(message);
			ImageUtil.encodeAndWrite(image, ImageUtil.PNG, os, BARCODE_DPI, BARCODE_DPI);
			os.flush();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	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) {
			Graphics g2d = barCodeImage.getGraphics();
			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);
			g2d.drawString(text, center, barCodeImage.getHeight() - (height / 10) - 2);
		}
	}

	// 2， 生成头部的商品信息
	public static void exportImg(List<String> list) {
		int width = 174;
		int height = 76;
		File file = new File("d:/image.png");
		Font font = new Font("console", Font.BOLD, 14);
		BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics2D g2 = (Graphics2D) bi.getGraphics();
		g2.setBackground(Color.WHITE);
		g2.clearRect(0, 0, width, height);
		g2.setPaint(Color.BLACK);

		for (int i = 0; i < list.size(); i++) {
			FontRenderContext context = g2.getFontRenderContext();
			Rectangle2D bounds = font.getStringBounds(list.get(i), context);
			double x = (width - bounds.getWidth()) / 2;
			double y = (height - bounds.getHeight()) / 2;
			double ascent = -bounds.getY();
			double baseY = y + (ascent * (i - 1));
			g2.drawString(list.get(i), (int) x, (int) baseY);
		}

		try {
			ImageIO.write(bi, "png", file);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	// 3，合并图片
	public static boolean mergeImage(String[] imgs, String type, String dst_pic) {
		int len = imgs.length;
		if (len < 1) {
			return false;
		}
		File[] src = new File[len];
		BufferedImage[] images = new BufferedImage[len];
		int[][] ImageArrays = new int[len][];
		for (int i = 0; i < len; i++) {
			try {
				src[i] = new File(imgs[i]);
				images[i] = ImageIO.read(src[i]);
			} catch (Exception e) {
				e.printStackTrace();
				return false;
			}
			int width = images[i].getWidth();
			int height = images[i].getHeight();
			ImageArrays[i] = new int[width * height];
			ImageArrays[i] = images[i].getRGB(0, 0, width, height, ImageArrays[i], 0, width);
		}
		int dst_height = 0;
		int dst_width = images[0].getWidth();
		for (int i = 0; i < images.length; i++) {
			dst_width = dst_width > images[i].getWidth() ? dst_width : images[i].getWidth();
			dst_height += images[i].getHeight();
		}
		if (dst_height < 1) {
			return false;
		}
		try {
			BufferedImage ImageNew = new BufferedImage(dst_width, dst_height, BufferedImage.TYPE_INT_RGB);
			int height_i = 0;
			for (int i = 0; i < images.length; i++) {
				ImageNew.setRGB(0, height_i, dst_width, images[i].getHeight(), ImageArrays[i], 0, dst_width);
				height_i += images[i].getHeight();
			}

			File outFile = new File(dst_pic);
			ImageIO.write(ImageNew, type, outFile);// 写图片 ，输出到硬盘
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}

	public static void main(String[] args) {
		List<String> list = new ArrayList<String>();
		list.add("商品类型：手机");
		list.add("品牌：魅族");
		list.add("商品价格：3199");
		list.add("有效时间：2019-6-30");
		exportImg(list);
		String code = "6974323434245";
		createBarcode(code);
		String s[] = { "d:/image.png", "d:/" + code + ".png" };
		mergeImage(s, "png", "d:/code/code_" + code + ".png");
		for (String str : s) {
			new File(str).delete();
		}

	}
}