Java-二维码

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.0.0</version>
</dependency>

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.HashMap;
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;

public class Test {

    public static void main(String[] args) {
        //设置二维码像素
        int width = 300;
        int height = 300;
        //二维码图片格式
        String format = "png";
        //二维码当中要存储的信息
        String content = "http://www.xiang5.com";
        HashMap<EncodeHintType, Comparable> hints = new HashMap<EncodeHintType, Comparable>();
        hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.M);
        
        //设置边距
        try {
            hints.put(EncodeHintType.MARGIN,2);
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE,width,height,hints);
            Path file = new File("D:/qrcode.png").toPath();
            MatrixToImageWriter.writeToPath(bitMatrix,format,file);
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

 所需要的架包：

　　下载地址：  https://github.com/ZF520/QRCode/raw/master/zxing/bin/lib/zxing3.3.1.jar