注意事項：
1. 此範例使用 Maven 建置相關內容請另行查閱
2. 文章內容僅供參考
目錄
檔案配置
JavaSample
|____main
| |____java
| | |____sample
| | |____qrcode
| | |____QRCodeUtils.java
| | |____SampleMain.java
| |____resources
| |____qrcode-logo.png
|____output.png
|____pom.xml
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>tw.cookie.project</groupId>
<artifactId>JavaSample</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<zxing.version>3.1.0</zxing.version>
</properties>
<dependencies>
<!-- Official ZXing ("Zebra Crossing") -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>${zxing.version}</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>${zxing.version}</version>
</dependency>
</dependencies>
</project>
QRCodeUtils
package sample.qrcode;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import static com.google.zxing.BarcodeFormat.QR_CODE;
/**
* Created by Cookie on 16/1/30.
*/
public class QRCodeUtils {
private static final String IMAGE_FORMAT = "png";
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private static final int WIDTH = 256;
private static final int HEIGHT = 256;
private static final String FRONT_IMAGE_NAME = "qrcode-logo.png";
private static final BufferedImage FRONT_IMG;
private static final int FRONT_IMG_START_X;
private static final int FRONT_IMG_START_Y;
private static final QRCodeWriter WRITER = new QRCodeWriter();
static {
InputStream inputStream = null;
BufferedInputStream headBIS = null;
BufferedImage image = null;
int start_x = 0;
int start_y = 0;
try {
inputStream = ClassLoader.getSystemResourceAsStream(FRONT_IMAGE_NAME);
headBIS = new BufferedInputStream(inputStream);
image = ImageIO.read(headBIS);
start_x = (WIDTH - image.getWidth()) /2;
start_y = (HEIGHT - image.getHeight()) /2;
} catch (Exception e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (headBIS != null) {
try {
headBIS.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
FRONT_IMG = image;
FRONT_IMG_START_X = start_x;
FRONT_IMG_START_Y = start_y;
}
public static ByteArrayOutputStream encode(String content) {
ByteArrayOutputStream result = null;
try {
BitMatrix matrix = WRITER.encode(content, QR_CODE, WIDTH, HEIGHT);
result = new ByteArrayOutputStream();
MatrixToImageWriter.writeToStream(matrix, IMAGE_FORMAT, result);
} catch (Exception e) {
e.printStackTrace();
close(result);
}
return result;
}
public static ByteArrayOutputStream encodeWithLogo(String content) {
if (FRONT_IMG == null) {
return encode(content);
}
ByteArrayOutputStream result = null;
try {
BitMatrix matrix = WRITER.encode(content, QR_CODE, WIDTH, HEIGHT);
BufferedImage backImage = QRCodeUtils.toBufferedImage(matrix);
Graphics2D g = backImage.createGraphics();
g.drawImage(FRONT_IMG, FRONT_IMG_START_X, FRONT_IMG_START_Y, null);
result = new ByteArrayOutputStream();
if(!ImageIO.write(backImage, IMAGE_FORMAT, result)) {
throw new IOException("Could not write an image of format png.");
}
} catch (Exception e) {
e.printStackTrace();
close(result);
}
return result;
}
private static BufferedImage toBufferedImage(BitMatrix matrix) {
int w = matrix.getWidth();
int h = matrix.getHeight();
BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}
private static void close(Closeable obj) {
if (obj == null) return;
try {
obj.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Sample Main
package sample.qrcode;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
/**
* Created by Cookie on 16/1/30.
*/
public class SampleMain {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream stream = QRCodeUtils.encodeWithLogo(
"http://tsai-cookie.blogspot.com/2016/01/qrcode-with-logo-java-sample.html");
if (stream == null) throw new RuntimeException("Create QRCode Failed.");
FileOutputStream out = new FileOutputStream("output.png");
out.write(stream.toByteArray());
stream.close();
out.close();
}
}
成果
