二次元コードを生成する(必要に応じて)

    当時アリクラウドから身を取得しようと、それは良いのgetではありません。ちょうどライン上のツールを呼び出して、ユーティリティクラスをまとめました。これは、二次元コードは、異なる要件に異なる応じて生成することができるです。

そのような入力パラメータ入力:
ここに画像を挿入説明
コードは以下の通りである:
QRCodeController

package com.richfit.richfit.controller;

import com.richfit.richfit.QRCodeUtil;
import com.richfit.richfit.service.QRCodeAddLogoService;
import com.richfit.richfit.service.QRCodeService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.io.File;

/**
 * @ClassName QRCodeController
 * @Description: 二维码生成(根据不同要求,required = false 输入参数) 
 * @Author BruthLi
 * @Date 2020/2/8
 * @Version V1.0
 **/
@Api(value = "二维码生成(根据不同要求)")
@RestController
@RequestMapping(value = "/sys/qrcode")
public class QRCodeController {

    @Autowired
    private QRCodeService  qRCodeService;

    @Autowired
    private QRCodeAddLogoService qRCodeAddLogoService;


    /**
     * 生成不同种类的二维码  依赖于QRCodeUtil工具类
     * @param content      内容
     * @param imgPath      LOGO地址
     * @param destPath     存放目录
     * @param needCompress 是否压缩LOGO 不压logo会把二维码掩盖那就不是二维码了也不能扫了
     * @throws Exception
     */
    @ApiOperation(value = "二维码生成(内嵌logo)",notes = "二维码生成(内嵌logo)")
    @RequestMapping(value = "/qrcodeaddlogo",method = RequestMethod.POST)
    public String qrcodAddLogo(@ApiParam(name = "content",value = "扫码后跳转地址",required = true) @RequestParam(value = "content",required = true)String content,
                             @ApiParam(name = "imgPath",value = "logo的地址",required = false) @RequestParam(value = "imgPath",required = false)String imgPath,
                             @ApiParam(name = "destPath",value = "二维码在本地的保存地址",required = true) @RequestParam(value = "destPath",required = true)String destPath,
                             @ApiParam(name = "needCompress",value = "是否压缩LOGO",required = false) @RequestParam(value = "needCompress",required = false)boolean needCompress,
                             @ApiParam(name = "imageType",value = "生成图片的类型例如 jpg 注意前面不需要加 . ",required = true) @RequestParam(value = "imageType",required = true)String imageType) throws Exception{
        String encode = QRCodeUtil.encode(content, imgPath, destPath, needCompress,imageType);
        return encode;
    }

    /**
     *生成普通二维码(没有logo)
     * @param content
     * @param path
     * @param imageType
     * @return  File  "C:\\0c93c3c3-2153-44c4-8795-836fbcfe6509.jpg"
     */
    @ApiOperation(value = "二维码生成",notes = "二维码生成")
    @RequestMapping(value = "/qrcodeproduct",method = RequestMethod.POST)
    public File qrcodeproduct(@ApiParam(name = "content",value = "扫码后跳转地址",required = true) @RequestParam(value = "content",required = true)String content,
                              @ApiParam(name = "path",value = "二维码在本地的保存地址",required = true) @RequestParam(value = "path",required = true)String path,
                              @ApiParam(name = "imageType",value = "生成图片的类型例如 jpg 注意前面不需要加 . ",required = true) @RequestParam(value = "imageType",required = true)String imageType){
       return qRCodeService.qrcodeproduct(content,path,imageType);
    }

}

QRCodeUtil

package com.richfit.richfit;

import cn.hutool.extra.qrcode.BufferedImageLuminanceSource;
import com.google.zxing.*;
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;
/********************************************************************************
 * Description: 二维码制作工具类
 * @author BruthLi
 * @version 1.0
 */
public class QRCodeUtil {
    private static final String CHARSET = "utf-8";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 60;
    // LOGO高度
    private static final int HEIGHT = 60;


    /**
     * 生成二维码
     * @param content   源内容
     * @param imgPath   生成二维码保存的路径
     * @param needCompress  是否要压缩
     * @return      返回二维码图片
     * @throws Exception
     */
    private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
        Hashtable hints = new Hashtable();
        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;
    }

    /**
     * 在生成的二维码中插入图片
     * @param source
     * @param imgPath
     * @param needCompress
     * @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();
    }

    /**
     *  生成带logo二维码
     * @param content
     * @param imgPath   logo图片
     * @param destPath
     * @param needCompress
     * @parm imageType 图片结尾标志  jpg  png
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath, boolean needCompress,String imageType) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999) + "."+imageType;//生成随机文件名
        ImageIO.write(image, imageType, new File(destPath + "/" + file));
        return file;
    }

    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();
        }
    }

    /**
     *  生成带logo二维码 不压缩
     * @param content
     * @param imgPath
     * @param destPath
     * @param imageType
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath,String imageType) throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false,imageType);
    }

    /**
     *  生成不带logo二维码
     * @param content
     * @param imgPath
     * @param destPath
     * @param imageType
     * @throws Exception
     */
    public static void encode(String content, String destPath, boolean needCompress,String imageType) throws Exception {
        QRCodeUtil.encode(content, null, destPath, needCompress,imageType);
    }

    /**
     *  生成不带logo二维码 不压缩
     * @param content
     * @param imgPath
     * @param destPath
     * @param imageType
     * @throws Exception
     */
    public static void encode(String content, String destPath,String imageType) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false,imageType);
    }

    public static void encode(String content, String imgPath, OutputStream output, boolean needCompress, String imageType)
            throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        ImageIO.write(image, imageType, output);
    }

    /**
     * 生成不带logo二维码 不压缩 输入流的形式
     * @param content
     * @param output
     * @param imageType
     * @throws Exception
     */
    public static void encode(String content, OutputStream output,String imageType) throws Exception {
        QRCodeUtil.encode(content, null, output, false,imageType);
    }


    /**
     * 从二维码中,解析数据
     * @param file  二维码图片文件
     * @return   返回从二维码中解析到的数据值
     * @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 hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }
//    try {
////String text = "http://weifeng.nethangzhou.com/wf/weixin/getUserInfoCode";
//String text = "http://www.lechuan100.com/plugin.php?id=haven_article&mod=my&aid=21";
////生成带logo 的二维码
////QRCodeUtil.encode(text, "d:/730.png", "d:/wfqrcode", true);
////生成不带logo 的二维码
//QRCodeUtil.encode(text,"","d:/wfqrcode",true);
//
////指定二维码图片,解析返回数据
////System.out.println(QRCodeUtil.decode("D:/WPS/75040887.jpg"));
//} catch (Exception e) {
//e.printStackTrace();
//}
}

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