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  • 生成二维码

    package cn.com.utils;
    
    
    import com.google.zxing.BarcodeFormat;
    import com.google.zxing.EncodeHintType;
    import com.google.zxing.MultiFormatWriter;
    import com.google.zxing.client.j2se.MatrixToImageWriter;
    import com.google.zxing.common.BitMatrix;
    import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
    import java.io.File;
    import java.nio.file.Path;
    import java.util.HashMap;
    import java.util.UUID;
    
    public class QrCodeUtils {
    
        public File createQrCode(String content) throws Exception {
            final int width = 300;
            final int height = 300;
            final String format = "png";
            //定义二维码的参数
            HashMap hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
            hints.put(EncodeHintType.MARGIN, 2);
            //生成二维码
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
    
            String folder = System.getProperty("java.io.tmpdir");
            String fileName = UUID.randomUUID().toString()+".png";
    
            Path file = new File(folder,fileName).toPath();
            MatrixToImageWriter.writeToPath(bitMatrix, format, file);
    
            return file.toFile();
        }
    
    
    }
    <!-- 二维码相关 -->
            <dependency>
                <groupId>com.google.zxing</groupId>
                <artifactId>core</artifactId>
                <version>3.3.3</version>
            </dependency>
            <dependency>
                <groupId>com.google.zxing</groupId>
                <artifactId>javase</artifactId>
                <version>3.3.3</version>
            </dependency>
                
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  • 原文地址:https://www.cnblogs.com/bevis-byf/p/11720691.html
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