java - 生成二维码或一维码转base64

偏执的太偏执、 2023-10-07 15:33 27阅读 0赞

### 具体依赖 ###

<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>3.4.0</version>
    </dependency>

### 代码实现 ###

import com.google.zxing.BarcodeFormat;
    import com.google.zxing.EncodeHintType;
    import com.google.zxing.MultiFormatWriter;
    import com.google.zxing.WriterException;
    import com.google.zxing.client.j2se.MatrixToImageWriter;
    import com.google.zxing.common.BitMatrix;
    import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
    
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.util.Base64;
    import java.util.HashMap;
    
    public class CodeToBase64 {
        
    
        /**
         * 生成二维码转base64
         */
        public static String QrCodeBase64(String code) {
        
            int width = 300;
            int height = 300;
            HashMap<EncodeHintType, Object> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            // 容错级别 这里选择最高H级别
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
            // 生成二维码图片
            // base64
            String encodeToString = "";
            try {
        
                BitMatrix bitMatrix = new MultiFormatWriter().encode(code, BarcodeFormat.QR_CODE, width, height, hints);
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                MatrixToImageWriter.writeToStream(bitMatrix, "PNG", outputStream);
                Base64.Encoder encoder = Base64.getEncoder();
                encodeToString = encoder.encodeToString(outputStream.toByteArray());
            } catch (WriterException e) {
        
                e.printStackTrace();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
            return "data:image/jpeg;base64," + encodeToString;
        }
    
        /**
         * 生成一维码转base64
         */
        public static String barCodeBase64(String code) {
        
            int width = 105;
            int height = 50;
            HashMap<EncodeHintType, Object> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            // 容错级别 这里选择最高H级别
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
            String encodeToString = "";
            try {
        
                // 生成条形码图片
                BitMatrix bitMatrix = new MultiFormatWriter().encode(code, BarcodeFormat.CODE_128, width, height, hints);
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                MatrixToImageWriter.writeToStream(bitMatrix, "PNG", outputStream);
                Base64.Encoder encoder = Base64.getEncoder();
                encodeToString = encoder.encodeToString(outputStream.toByteArray());
            } catch (WriterException e) {
        
                e.printStackTrace();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
            return "data:image/jpeg;base64," + encodeToString;
        }
    }