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  • java使用zxing插件绘制二维码

    ZXing是一个开放源码的,用Java实现的多种格式的1D/2D条码图像处理库,它包含了联系到其他语言的端口。Zxing可以实现使用手机的内置的摄像头完成条形码的扫描及解码。

    涉及到的依赖有:

    <!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
            <dependency>
                <groupId>com.google.zxing</groupId>
                <artifactId>core</artifactId>
                <version>3.3.0</version>
            </dependency>
    
            <!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
            <dependency>
                <groupId>com.google.zxing</groupId>
                <artifactId>javase</artifactId>
                <version>3.3.0</version>
            </dependency>

    具体代码:

    package com.example.demo.controller;
    
    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 org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     *  @Description:
     *  @author miaoying
     *  @date 2018/6/4
     */
    @Controller
    public class DrawController {
    
        @RequestMapping("/getQrCodePic")
        public String getQrCodePic(@RequestParam("content") String content, HttpServletResponse response) throws WriterException, IOException {
            OutputStream outputStream = response.getOutputStream();
            int width = 200;
            int height = 200;
            String format = "png";
            Map<EncodeHintType, Object> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
            MatrixToImageWriter.writeToStream(bitMatrix, format, outputStream);
            return "qrcode";
        }
    
    }

    访问链接:http://localhost:8080/getQrCodePic?content=miaoying

    最终结果:

     

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  • 原文地址:https://www.cnblogs.com/miaoying/p/9134538.html
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