Java使用QRcode生成二维码

浅浅的花香味﹌ 2024-04-03 11:58 85阅读 0赞

#### 1、添加依赖 ####

<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>

#### 2、创建工具类 ####

/**
     * 二维码生成工具类
     * @author Cloud
     * @data   2022-10-13
     * QRCode
     */
    public class QRCodeUtil {
        
    
        //二维码颜色
        private static final int BLACK = 0xFF000000;
        //二维码颜色
        private static final int WHITE = 0xFFFFFFFF;
    
        /**
         * <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二维码</span>
         *
         * @param text       <a href="javascript:void();">二维码内容</a>
         * @param width      二维码宽
         * @param height     二维码高
         * @param outPutPath 二维码生成保存路径
         * @param imageType  二维码生成格式
         */
        public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType) throws UnsupportedEncodingException {
        
            Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
            //设置编码字符集
            his.put(EncodeHintType.CHARACTER_SET, "utf-8");
            text = new String(text.getBytes("UTF-8"),"UTF-8");
            try {
        
                //1、生成二维码
                BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,his);
                //2、获取二维码宽高
                int codeWidth = encode.getWidth();
                int codeHeight = encode.getHeight();
                //3、将二维码放入缓冲流
                BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
                for (int i = 0; i < codeWidth; i++) {
        
                    for (int j = 0; j < codeHeight; j++) {
        
                        //4、循环将二维码内容定入图片
                        image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
                    }
                }
                File outPutImage = new File(outPutPath);
                //如果图片不存在创建图片
                if (!outPutImage.exists())
                    outPutImage.createNewFile();
                //5、将二维码写入图片
                ImageIO.write(image, imageType, outPutImage);
            } catch (WriterException e) {
        
                e.printStackTrace();
                System.out.println("二维码生成失败");
            } catch (IOException e) {
        
                e.printStackTrace();
                System.out.println("生成二维码图片失败");
            }
        }
    }

#### 3、编写测试类 ####

/**
     * @author zzw
     * @description TODO
     * @date 2022-10-13
     */
    public class Test{
        
        @Test
        public void test(){
        
            // QRcode 二维码生成测试
            QRCodeUtil.zxingCodeCreate("我使用Java生成了二维码",300, 300, "E:/borths.jpg", "jpg");
        }
    }

#### 4、生成二维码测试 ####

![在这里插入图片描述][3495b6a4cd57496c98a3c2794f97c0ad.png]

#### 5、效果展示 ####

![在这里插入图片描述][657c8709bd1a4722acfbe21cf4e7dc8d.png]

[3495b6a4cd57496c98a3c2794f97c0ad.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/ae8a999ce6364212a5b468abfde8ced6.png
[657c8709bd1a4722acfbe21cf4e7dc8d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/9072f02b93d947b9b1259da2870d3d6b.png