ZxingTest二维码

public class ZxingTest {
    public static void main(String[] args) throws WriterException, IOException {
        String mecard = "MECARD:N:王**;ORG:杭州;EMAIL:[email protected];ADR:杭州;NOTE:java开发;;";

        // 还是乱码 mecard = new String(mecard.getBytes("ISO8859-1"), "UTF-8");

        //解决乱码
        Map hints = Maps.newHashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        BitMatrix bitMatrix = new MultiFormatWriter().encode(mecard, BarcodeFormat.QR_CODE, 200, 200,hints);

        MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream("D:/qr.png"));

    }
}

 /**
     * 将客户信息生成二维码
     */
    @RequestMapping(value = "/qrcode/{id:\\d+}.png",method = RequestMethod.GET)
    public void makeQrCode(@PathVariable Integer id,HttpServletResponse response) throws IOException, WriterException {
        String mecard = customerService.makeMeCard(id);

        Map hints = Maps.newHashMap();
        hints.put(EncodeHintType.CHARACTER_SET,"UTF-8");

        BitMatrix bitMatrix = new MultiFormatWriter().encode(mecard, BarcodeFormat.QR_CODE,200,200,hints);

        OutputStream outputStream = response.getOutputStream();
        MatrixToImageWriter.writeToStream(bitMatrix,"png",outputStream);
        outputStream.flush();
        outputStream.close();
    }

 /**
     * 将客户信息生成MECard格式
     * @param id
     * @return
     */
    public String makeMeCard(Integer id) {
        Customer customer = customerMapper.findById(id);

        StringBuilder mecard = new StringBuilder("MECARD:");
        if(StringUtils.isNotEmpty(customer.getName())) {
            mecard.append("N:"+customer.getName()+";");
        }
        if(StringUtils.isNotEmpty(customer.getTel())) {
            mecard.append("TEL:"+customer.getTel()+";");
        }
        if(StringUtils.isNotEmpty(customer.getEmail())) {
            mecard.append("EMAIL:"+customer.getEmail()+";");
        }
        if(StringUtils.isNotEmpty(customer.getAddress())) {
            mecard.append("ADR:"+customer.getAddress()+";");
        }
        if(StringUtils.isNotEmpty(customer.getCompanyname())) {
            mecard.append("ORG:"+customer.getCompanyname()+";");
        }
        mecard.append(";");

        return mecard.toString();
    }

使用

div class="box-body" style="text-align: center">

            ![](/makeQrCode.png)
        

工具类

package com.kaishengit.util;

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.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

/**
 * 二维码工具类
 */
public class QrCodeUtil {

    // 默认二维码宽度
    private static final int width = 300;
    // 默认二维码高度
    private static final int height = 300;
    // 默认二维码文件格式
    private static final String format = "png";
    // 二维码参数
    private static final Map hints = new HashMap();

    static {
        // 字符编码
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        // 容错等级 L、M、Q、H 其中 L 为最低, H 为最高
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        // 二维码与图片边距
        hints.put(EncodeHintType.MARGIN, 2);
    }
    /**
     * 将二维码图片输出到一个流中
     * @param content 二维码内容
     * @param stream  输出流
     * @param width   宽
     * @param height  高
     */
    public static void writeToStream(String content, OutputStream stream, int width, int height) throws WriterException, IOException {
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
        MatrixToImageWriter.writeToStream(bitMatrix, format, stream);
    }

    /**
     * 生成二维码图片文件
     * @param content 二维码内容
     * @param path    文件保存路径
     * @param width   宽
     * @param height  高
     */
    public static void createQRCode(String content, String path, int width, int height) throws WriterException, IOException {
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
        //toPath() 方法由 jdk1.7 及以上提供
        MatrixToImageWriter.writeToPath(bitMatrix, format, new File(path).toPath());
    }


}

maven 依赖


  com.google.zxing
  core
  3.0.0
  
  
  com.google.zxing
  javase
  3.0.0  
  

package com.kaishengit;

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Hashtable;

public class Test {

    public static void main(String[] args) throws IOException {

        String text = "www.baidu.com";
        int width = 100;
        int height = 100;
        String format = "png";
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        hints.put(EncodeHintType.MARGIN, 2);
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);
            Path file = new File("D:/new.png").toPath();
            MatrixToImageWriter.writeToPath(bitMatrix, format, file);
        } catch (WriterException e) {
      // TODO Auto-generated catch block
            e.printStackTrace();
        }

        //解析二维码
        resolve();


    }

    private static void resolve() {
        MultiFormatReader formatReader = new MultiFormatReader();
        File file = new File("D:/new.png");
        BufferedImage image = null;
        try {
            image = ImageIO.read(file);
        } catch (IOException e) {

            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        Result result = null;
        try {
            result = formatReader.decode(binaryBitmap, hints);
        } catch (NotFoundException e) {
            e.printStackTrace();
        }
        System.err.println("解析结果：" + result.toString());
        System.out.println(result.getBarcodeFormat());
        System.out.println(result.getText());
    }
}