Java利用Zxing生成二维码的简单实例
作者:jingxian 时间:2023-08-21 13:16:26
Zxing是Google提供的关于条码(一维码、二维码)的解析工具,提供了二维码的生成与解析的方法,现在我简单介绍一下使用Java利用Zxing生成与解析二维码
1、二维码的生成
1.1 将Zxing-core.jar 包加入到classpath下。
1.2 二维码的生成需要借助MatrixToImageWriter类,该类是由Google提供的,可以将该类拷贝到源码中,这里我将该类的源码贴上,可以直接使用。
import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.OutputStream;
import java.io.IOException;
import java.awt.image.BufferedImage;
public final class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private MatrixToImageWriter() {}
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}
public static void writeToFile(BitMatrix matrix, String format, File file)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}
public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
}
1.3 编写生成二维码的实现代码
try {
String content = "120605181003;http://www.cnblogs.com/jtmjx";
String path = "C:/Users/Administrator/Desktop/testImage";
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);
File file1 = new File(path,"餐巾纸.jpg");
MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
} catch (Exception e) {
e.printStackTrace();
}
现在运行后即可生成一张二维码图片,是不是很简单啊? 接下来我们看看如何解析二维码
2、二维码的解析
2.1 将Zxing-core.jar 包加入到classpath下。
2.2 和生成一样,我们需要一个辅助类( BufferedImageLuminanceSource),同样该类Google也提供了,这里我同样将该类的源码贴出来,可以直接拷贝使用个,省去查找的麻烦
BufferedImageLuminanceSource
import com.google.zxing.LuminanceSource;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
public final class BufferedImageLuminanceSource extends LuminanceSource {
private final BufferedImage image;
private final int left;
private final int top;
public BufferedImageLuminanceSource(BufferedImage image) {
this(image, 0, 0, image.getWidth(), image.getHeight());
}
public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
super(width, height);
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
if (left + width > sourceWidth || top + height > sourceHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}
for (int y = top; y < top + height; y++) {
for (int x = left; x < left + width; x++) {
if ((image.getRGB(x, y) & 0xFF000000) == 0) {
image.setRGB(x, y, 0xFFFFFFFF); // = white
}
}
}
this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
this.image.getGraphics().drawImage(image, 0, 0, null);
this.left = left;
this.top = top;
}
@Override
public byte[] getRow(int y, byte[] row) {
if (y < 0 || y >= getHeight()) {
throw new IllegalArgumentException("Requested row is outside the image: " + y);
}
int width = getWidth();
if (row == null || row.length < width) {
row = new byte[width];
}
image.getRaster().getDataElements(left, top + y, width, 1, row);
return row;
}
@Override
public byte[] getMatrix() {
int width = getWidth();
int height = getHeight();
int area = width * height;
byte[] matrix = new byte[area];
image.getRaster().getDataElements(left, top, width, height, matrix);
return matrix;
}
@Override
public boolean isCropSupported() {
return true;
}
@Override
public LuminanceSource crop(int left, int top, int width, int height) {
return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
}
@Override
public boolean isRotateSupported() {
return true;
}
@Override
public LuminanceSource rotateCounterClockwise() {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
Graphics2D g = rotatedImage.createGraphics();
g.drawImage(image, transform, null);
g.dispose();
int width = getWidth();
return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
}
}
2.3 编写解析二维码的实现代码
try {
MultiFormatReader formatReader = new MultiFormatReader();
String filePath = "C:/Users/Administrator/Desktop/testImage/test.jpg";
File file = new File(filePath);
BufferedImage image = ImageIO.read(file);;
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
Result result = formatReader.decode(binaryBitmap,hints);
System.out.println("result = "+ result.toString());
System.out.println("resultFormat = "+ result.getBarcodeFormat());
System.out.println("resultText = "+ result.getText());
} catch (Exception e) {
e.printStackTrace();
}
现在运行后可以看到控制台打印出了二维码的内容。
到此为止,利用Zxing生成和解析二维码就讲述演示完毕,主要为自己做备忘,同时方便有需要的人。呵呵!
标签:java,zxing,二维码
![](/images/zang.png)
![](/images/jiucuo.png)
猜你喜欢
基于WPF实现步骤控件的示例代码
2021-09-12 15:16:16
![](https://img.aspxhome.com/file/2023/9/91389_0s.jpg)
C#实现控制Windows系统关机、重启和注销的方法
2023-07-24 17:15:05
浅试仿 mapstruct实现微服务编排框架详解
2022-07-12 13:20:44
![](https://img.aspxhome.com/file/2023/0/63420_0s.png)
Android实现状态栏和虚拟按键背景颜色的变化实例代码详解
2023-02-07 00:17:15
![](https://img.aspxhome.com/file/2023/4/123244_0s.jpg)
Java验证码功能的实现方法
2023-07-05 21:28:21
![](https://img.aspxhome.com/file/2023/4/92724_0s.gif)
Android自定义可标记日历效果
2022-09-06 04:11:22
![](https://img.aspxhome.com/file/2023/0/114330_0s.jpg)
IDEA MyBatis Plugins自动生成实体类和mapper.xml
2021-07-24 01:26:37
![](https://img.aspxhome.com/file/2023/8/83048_0s.jpg)
Java equals 方法与hashcode 方法的深入解析
2022-03-05 19:20:15
java读取文件内容,解析Json格式数据方式
2021-10-07 13:56:23
![](https://img.aspxhome.com/file/2023/9/63429_0s.png)
C# DataGridView添加新行的2个方法
2023-06-23 05:42:19
java判断字符串String是否为空问题浅析
2023-08-25 07:06:06
Java实现数组转字符串及字符串转数组的方法分析
2022-04-14 10:53:44
十分钟理解Java中的动态代理
2022-05-16 04:53:19
![](https://img.aspxhome.com/file/2023/5/60265_0s.jpg)
java组件commons-fileupload实现文件上传、下载、在线打开
2022-02-24 22:16:59
![](https://img.aspxhome.com/file/2023/9/97789_0s.gif)
Android 下载文件通知栏显示进度条功能的实例代码
2023-09-01 19:42:50
详解Java多态对象的类型转换与动态绑定
2021-10-12 06:59:59
java guava主要功能介绍及使用心得总结
2023-07-30 11:01:54
Android实现屏幕录制功能
2022-10-29 15:26:36
![](https://img.aspxhome.com/file/2023/8/117158_0s.jpg)
MyBatis-Plus工具使用之EntityWrapper解析
2021-10-09 06:13:48
@TransactionalEventListener的使用和实现原理分析
2022-01-19 06:15:11