QRGen+thumbnailator生成包含logo 参考配置说明

以下主要是说明下生成的一些细节，减少使用难度

参考代码

• 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>com.dalong</groupId>

    <artifactId>imageapp</artifactId>

    <version>1.0-SNAPSHOT</version>

    <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>8</source>

                    <target>8</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

    <repositories>

        <repository>

            <id>jitpack.io</id>

            <url>https://jitpack.io</url>

        </repository>

    </repositories>

   <dependencies>

​

       <dependency>

           <groupId>apache-codec</groupId>

           <artifactId>commons-codec</artifactId>

           <version>1.2</version>

       </dependency>

       <dependency>

           <groupId>com.github.kenglxn.qrgen</groupId>

           <artifactId>javase</artifactId>

           <version>2.6.0</version>

       </dependency>

       <dependency>

           <groupId>net.coobird</groupId>

           <artifactId>thumbnailator</artifactId>

           <version>0.4.8</version>

       </dependency>

   </dependencies>

</project>

• 代码

package com.dalong;

​

import net.coobird.thumbnailator.Thumbnails;

import net.coobird.thumbnailator.geometry.Positions;

import net.coobird.thumbnailator.resizers.configurations.AlphaInterpolation;

import net.glxn.qrgen.core.image.ImageType;

import net.glxn.qrgen.javase.QRCode;

import org.apache.commons.codec.binary.Base64;

​

import javax.imageio.ImageIO;

import java.io.*;

​

public class Application {

        public static void main(String[] args) throws IOException {

            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

            // 符合黑白模式的，推荐withColor 的第一个参数为0xFF000000，这样保障生成的二维码具有比较高的识别度

            File file =   QRCode.from("https://github.com/rongfengliang").withColor(0xFF000000, 0xf7f7f7).to(ImageType.PNG).withSize(300, 300).file();

           // 基于水印模式进行logo的添加，推荐水印配置alphaInterpolation为AlphaInterpolation.QUALITY

            Thumbnails.of(file)

                .size(300, 300)

                .allowOverwrite(true)

               .keepAspectRatio(true)

                .alphaInterpolation(AlphaInterpolation.QUALITY)

       .watermark(Positions.CENTER, ImageIO.read(Application.class.getClassLoader().getResourceAsStream("yyy.png")), 1f)

                .toOutputStream(outputStream);

            byte[] encodedBytes = Base64.encodeBase64(outputStream.toByteArray());

            System.out.println(new String(encodedBytes));

        }

}

参考资料

https://github.com/kenglxn/QRGen
https://github.com/coobird/thumbnailator