Kotlin – ZXing을 사용하여 QR코드 읽기/쓰기 방법

의존성

<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.2</version>
</dependency>

<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>javase</artifactId>
    <version>3.3.2</version>
</dependency>

둘QR코드에 데이터 쓰기

package com.javasampleapproach.kotlin.qrcode

import java.io.IOException
import java.nio.file.FileSystems
import java.nio.file.Path
import com.google.zxing.BarcodeFormat
import com.google.zxing.WriterException
import com.google.zxing.client.j2se.MatrixToImageWriter
import com.google.zxing.common.BitMatrix
import com.google.zxing.qrcode.QRCodeWriter

@Throws(WriterException::class, IOException::class)
fun main(args: Array?) {

    val qrCodeWriter = QRCodeWriter()
    val bitMatrix = qrCodeWriter.encode(
            "JavaSampleApproach\nJava Technology, Spring Framework",
            BarcodeFormat.QR_CODE,
            350, 350) // width x height

    val path = FileSystems.getDefault().getPath("JSA-QRCode.png")
    MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path)
}

3. QR코드에서 데이터를 읽는다