Java 二维码及条形码处理

Maven依赖

<dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.4.1</version>
</dependency>

二维码

生成二维码

import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;public class DemoTest {public static void main(String[] args) throws Exception {// 二维码原理（将字符串信息通过一规则转换为图像）// 生成二维码String name = "d:/my.png";String content = "wwww.hcitlife.show";int width = 400;int height = 400;// BitMatrix bm = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height);Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();hints.put(EncodeHintType.MARGIN, 2);hints.put(EncodeHintType.CHARACTER_SET, "utf-8");BitMatrix bm = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);MatrixToImageWriter.writeToStream(bm, "png", new FileOutputStream(name));// BufferedImage bar = ImageIO.read(new File(name));// 解压读取二维码}}

结果：

import java.io.File;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;import javax.imageio.ImageIO;import java.awt.Color;
import java.awt.image.BufferedImage;import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;public class DemoTest {public static void main(String[] args) throws Exception {// 二维码原理（将字符串信息通过一规则转换为图像）// 生成二维码String name = "d:/my.png";String content = "www.hcitlife.show";int width = 400;int height = 400;// BitMatrix bm = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE,// width, height);Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();hints.put(EncodeHintType.MARGIN, 2);hints.put(EncodeHintType.CHARACTER_SET, "utf-8");BitMatrix bm = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);MatrixToImageWriter.writeToStream(bm, "png", new FileOutputStream(name));BufferedImage bar = ImageIO.read(new File(name));BufferedImage ok = new BufferedImage(width, height, 1);ok.getGraphics().drawImage(bar, 0, 0, width, height, null);// System.out.println(String.format("%x", Color.RED.getRGB()));// int[][] px = new int[width][height];Random rand = new Random();Color c = new Color(rand.nextInt(255), rand.nextInt(255), rand.nextInt(255), rand.nextInt(255));for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {ok.setRGB(x, y, bar.getRGB(x, y) == -1 ? 0xffffffff : c.getRGB());}// if(x>5) break;}ImageIO.write(ok, "png", new File("d:/mymy.png"));// BufferedImage bar = ImageIO.read(new File(name));// 解压读取二维码System.out.println("end");}}

解析二维码

import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.ImageIO;import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;public class DemoTest {public static void main(String[] args) throws Exception {// 解析读取二维码//解析图像BufferedImage i = ImageIO.read(new File("c:/my.png"));LuminanceSource source = new BufferedImageLuminanceSource(i);BinaryBitmap image = new BinaryBitmap(new HybridBinarizer(source));try{Result result = new MultiFormatReader().decode(image);String info = result.getText();System.out.println(info);if(info==null || "".equals(info)){System.out.println("没有二维码信息");}else if(info.contains("weixin")){  //qq mpSystem.out.println("有微信二维码，不允许");}else{System.out.println("有二维，可以使用");}}catch(Exception e){System.out.println("图像中没有二维码");}}}

条形码


import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.awt.Color;
import java.awt.Font;
import java.awt.RenderingHints;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;public class DemoTest {public static void main(String[] args) throws Exception {// 生成产品条码效果String name = "d:/bar.png";String content = "6923790798701";int width = 300;int height = 100;BitMatrix bm = new MultiFormatWriter().encode(content, BarcodeFormat.EAN_13, width, height);MatrixToImageWriter.writeToStream(bm, "png", new FileOutputStream(name));BufferedImage bar2 = ImageIO.read(new File(name));BufferedImage bar = new BufferedImage(bar2.getWidth(), bar2.getHeight() + 30, 1);Graphics2D g = bar.createGraphics();g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);g.setColor(Color.WHITE);g.fillRect(0, 0, bar2.getWidth(), bar2.getHeight() + 30);g.drawImage(bar2, 0, 15, bar2.getWidth(), bar2.getHeight(), null);g.fillRect(62, 100, 85, 15);g.fillRect(155, 100, 83, 15);g.setColor(Color.BLACK);g.setFont(new Font("", Font.PLAIN, 22));g.drawString(content.substring(0, 1), 40, 120);g.drawString(content.substring(1, 7), 68, 120);g.drawString(content.substring(7), 158, 120);g.dispose();ImageIO.write(bar, "png", new File("c:/bar2.png"));}}

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Java 二维码及条形码处理

Maven依赖

二维码

生成二维码

解析二维码

条形码

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