java将字符串生成二维码并上传到七牛云

之前碰到一个需求是将一个url链接生成二维码，并且能够让用户通过二维码扫码打开这个链接，在此记录一下，云存储用的是七牛云OSS，所以首先需要引用七牛云的maven架包

        <dependency>
            <groupId>com.qiniu</groupId>
            <artifactId>qiniu-java-sdk</artifactId>
            <version>[7.7.0, 7.7.99]</version>
        </dependency>

		<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>3.3.0</version>
        </dependency>

import java.io.File;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;

public class QiniuUpload {
	
	/***
	* 简单上传示例
	*/
    public static void main(String[] args) {

        String accessKey = "your_access_key";
        String secretKey = "your_secret_key";
        String bucketName = "your_bucket_name";
        String localFilePath = "/path/to/local/file";
        String key = "file_key"; // 上传后的文件名

        // 创建配置对象
        Configuration cfg = new Configuration();

        // 指定上传策略
        StringMap policy = new StringMap();
        policy.put("callbackUrl", "http://your.callback.url"); // 上传成功后七牛云服务器向该URL发送POST请求
        policy.put("callbackBody", "key=$(key)&hash=$(etag)"); // 回调请求体内容，支持魔法变量$(key)和$(etag)

        // 创建上传管理器
        UploadManager uploadManager = new UploadManager(cfg);

        // 创建身份认证对象
        Auth auth = Auth.create(accessKey, secretKey);

        try {
            // 生成上传凭证
            String upToken = auth.uploadToken(bucketName, null, 3600, policy);

            // 上传文件
            Response response = uploadManager.put(new File(localFilePath), key, upToken);

            // 输出上传结果
            System.out.println(response.bodyString());

        } catch (QiniuException ex) {
            // 输出上传错误信息
            System.err.println(ex.response.bodyString());
        }
    }

/***
* 下面是具体业务
*/
private void getQrCode(String path) {
        //将路径生成二维码，再上传到七牛云
        String qrCodeUrl = null;
        try {
            String imagePath = QRCodeUtil.encode(path, imgPath, true);
            qrCodeUrl = qnUpload(imagePath);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

public String qnUpload(String localFilePath){
        //调用七牛云接口将本地文件上传到云端
        Configuration cfg = new Configuration(Region.region0());
        cfg.resumableUploadAPIVersion = Configuration.ResumableUploadAPIVersion.V2;// 指定分片上传版本
        UploadManager uploadManager = new UploadManager(cfg);
        Auth auth = Auth.create(qnyappKey, qnyappSecret);
        String upToken = auth.uploadToken(otherBucket);
        try {
            Response response = uploadManager.put(localFilePath, null, upToken);
            //解析上传成功的结果
            DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
            String qrCodeUrl = otherUrl + putRet.key;
            log.info(qrCodeUrl);
            log.info(putRet.hash);
            //上传成功后，将图片删除
            File file = new File(localFilePath);
            if (file.exists()) {
                file.delete();
            }
            return qrCodeUrl;
        } catch (QiniuException ex) {
            Response r = ex.response;
            System.err.println(r.toString());
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
                //ignore
            }
        }
        return null;
    }
}


import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
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.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;

public class QRCodeUtil {

    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 200;
    // LOGO高度
    private static final int HEIGHT = 200;

    public static BufferedImage createImage(String content, String imgPath,
                                            boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     * @param source
     * 二维码图片
     * @param imgPath
     * LOGO图片地址
     * @param needCompress
     * 是否压缩
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath,
                                    boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            System.err.println(""+imgPath+"   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 生成二维码(内嵌LOGO)
     * @param content
     *  内容
     * @param imgPath
     *  LOGO地址
     * @param destPath
     *  存放目录
     * @param needCompress
     *  是否压缩LOGO
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath,
                                boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String time = String.valueOf(System.currentTimeMillis());
        String nonce = time.substring(time.length()-3) + RandomUtils.getRandomStr(3);
        String file = nonce + RandomUtils.getRandomStr(5)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"\\"+file));
        return destPath+"\\"+file;
    }

    /**
     * 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
     * @param destPath 存放目录
     */
    public static void mkdirs(String destPath) {
        File file =new File(destPath);
        //当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

    /**
     * 生成二维码(内嵌LOGO)
     * @param content
     *  内容
     * @param imgPath
     *  LOGO地址
     * @param destPath
     *  存储地址
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath)
            throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false);
    }

    /**
     * 生成二维码
     * @param content
     *  内容
     * @param destPath
     *  存储地址
     * @param needCompress
     *  是否压缩LOGO
     * @throws Exception
     */
    public static String encode(String content, String destPath,
                              boolean needCompress) throws Exception {
        return QRCodeUtil.encode(content, null, destPath, needCompress);
    }

    /**
     * 生成二维码
     * @param content
     *  内容
     * @param destPath
     * 存储地址
     * @throws Exception
     */
    public static void encode(String content, String destPath) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false);
    }

    /**
     * 生成二维码(内嵌LOGO)
     * @param content
     *  内容
     * @param imgPath
     *  LOGO地址
     * @param output
     * 输出流
     * @param needCompress
     *  是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String imgPath,
                              OutputStream output, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }

    /**
     * 生成二维码
     * @param content
     *  内容
     * @param output
     * 输出流
     * @throws Exception
     */
    public static void encode(String content, OutputStream output)
            throws Exception {
        QRCodeUtil.encode(content, null, output, false);
    }

    /**
     * 解析二维码
     * @param file
     * 二维码图片
     * @return
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
                image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 解析二维码
     * @param path
     *  二维码图片地址
     * @return
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }

    /**
     *
     * @param content
     * @param imgPath
     * @param destPath
     * @param localUrl 当前环境的域名或者ip地址
     * @param needCompress
     * @return
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath,String localUrl,
                                boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return localUrl+file;
    }

    public static String encodeDZ(String content, String imgPath, String destPath,String localUrl,int length,int width,
                                  boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImageDZ(content, imgPath,length,width,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return localUrl+file;
    }

    private static BufferedImage createImageDZ(String content, String imgPath,int newlength,int newWidth,
                                               boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, newlength, newWidth, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    public static void main(String[] args) throws Exception {
        String text = "https://www.yoyow.org/files/d2b3b82351bda9e70b92c6ee219a432b.png";  //这里设置自定义网站url
        String logoPath =null;
        String destPath = "d:\\pic\\";
        String url=QRCodeUtil.encode(text, logoPath, destPath, true);
        System.out.println(url);

       /* String file="D:\\11.jpg";
        String info=QRCodeUtil.decode(file);
        System.out.println(info);*/
    }

}