build.gradle

apply plugin: 'java'

group 'com.qiita.nimzo6689'
version '1.0-SNAPSHOT'

sourceCompatibility = 1.12
compileJava.options.encoding = 'UTF-8'

repositories {
    mavenCentral()
    maven {
        url "https://jitpack.io"
    }
}

dependencies {
    compile 'com.github.kenglxn.QRGen:javase:2.6.0'
}

QRGenForEmail.java

package com.qiita.nimzo6689.snippet.qrgen.schema;

import net.glxn.qrgen.core.scheme.EMail;
import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenForEmail {
    public static void main(String[] args) throws Exception {
        EMail email = EMail.parse("mailto:taro.sato@example.com");
        File qrCode = QRCode.from(email).file();
        Files.copy(qrCode.toPath(), Paths.get("qrcode.png"), StandardCopyOption.REPLACE_EXISTING);
    }
}

QRGenForGeoInfo.java

package com.qiita.nimzo6689.snippet.qrgen.schema;

import net.glxn.qrgen.core.scheme.GeoInfo;
import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenForGeoInfo {
    public static void main(String[] args) throws Exception {
        GeoInfo geoInfo = GeoInfo.parse("geo:35.6706094,139.7662781");
        File qrCode = QRCode.from(geoInfo).file();
        Files.copy(qrCode.toPath(), Paths.get("qrcode.png"), StandardCopyOption.REPLACE_EXISTING);
    }
}

QRGenForUrl.java

package com.qiita.nimzo6689.snippet.qrgen.schema;

import net.glxn.qrgen.core.scheme.Url;
import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenForUrl {
    public static void main(String[] args) throws Exception {
        Url url = Url.parse("https://qiita.com/nimzo6689");
        File qrCode = QRCode.from(url).file();
        Files.copy(qrCode.toPath(), Paths.get("qrcode.png"), StandardCopyOption.REPLACE_EXISTING);
    }
}

QRGenToBaos.java

package com.qiita.nimzo6689.snippet.qrgen;

import net.glxn.qrgen.javase.QRCode;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;

public class QRGenToBaos {
    public static void main(String[] args) throws Exception {
        try (ByteArrayOutputStream qrCode = QRCode.from("https://qiita.com/nimzo6689").stream();
             OutputStream outputStream = Files.newOutputStream(Paths.get("qrcode.png"))) {

            qrCode.writeTo(outputStream);
            qrCode.flush();
        }
    }
}

QRGenToExistingOs.java

package com.qiita.nimzo6689.snippet.qrgen;

import net.glxn.qrgen.javase.QRCode;

import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;

public class QRGenToExistingOs {
    public static void main(String[] args) throws Exception {
        try (OutputStream os = Files.newOutputStream(Paths.get("qrcode.png"))) {
            QRCode.from("https://qiita.com/nimzo6689").writeTo(os);
            os.flush();
        }
    }
}

QRGenToFile.java

package com.qiita.nimzo6689.snippet.qrgen;

import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenToFile {
    public static void main(String[] args) throws Exception {
        File qrCode = QRCode.from("https://qiita.com/nimzo6689").file();
        Files.copy(qrCode.toPath(), Paths.get("qrcode.png"), StandardCopyOption.REPLACE_EXISTING);
    }
}

QRGenToSvg.java

package com.qiita.nimzo6689.snippet.qrgen;

import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenToSvg {
    public static void main(String[] args) throws Exception {
        File qrCode = QRCode.from("https://qiita.com/nimzo6689").svg();
        Files.copy(qrCode.toPath(), Paths.get("qrcode.svg"), StandardCopyOption.REPLACE_EXISTING);
    }
}

QRGenWithHint.java

package com.qiita.nimzo6689.snippet.qrgen;

import com.google.zxing.EncodeHintType;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import net.glxn.qrgen.core.image.ImageType;
import net.glxn.qrgen.javase.QRCode;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class QRGenWithHint {
    public static void main(String[] args) throws Exception {
        File qrCode = QRCode.from("https://qiita.com/nimzo6689")
                .to(ImageType.GIF)
                .withSize(320, 320)
                .withColor(0xFF6876B4, 0xFFF7F4F7)
                .withCharset("UTF-8")
                .withErrorCorrection(ErrorCorrectionLevel.L)
                .withHint(EncodeHintType.MARGIN, 2)
                .file();

        Files.copy(qrCode.toPath(), Paths.get("qrcode.gif"), StandardCopyOption.REPLACE_EXISTING);
    }
}