添加excel导出的功能

zhaoxiaohao

2020-12-28 861200b968f21a748aa322635f55e48e79dafb1e

 kidgrow-commons/kidgrow-common-spring-boot-starter/src/main/java/com/kidgrow/common/utils/QRCodeUtil.java

@@ -14,6 +14,9 @@
import java.io.IOException;
import java.util.Hashtable;

import static com.google.zxing.client.j2se.MatrixToImageConfig.BLACK;
import static com.google.zxing.client.j2se.MatrixToImageConfig.WHITE;

/**
 * @Author: dougang
 * @Description:
@@ -23,17 +26,18 @@

    /**
     * 生成二维码
     *
     * @param contents
     * @param width
     * @param height
     * @param level 0:M,1:L,2:H,3:Q
     * @param level    0:M,1:L,2:H,3:Q
     * @return
     */
    public static String creatRrCode(String contents, int width, int height,int level) {
    public static String creatRrCode(String contents, int width, int height, int level) {
        String binary = null;
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        switch (level){
        switch (level) {
            case 0:
                hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
                break;
@@ -55,7 +59,11 @@
                    contents, BarcodeFormat.QR_CODE, width, height, hints);
            // 读取文件转换为字节数组
            ByteArrayOutputStream out = new ByteArrayOutputStream();

            BufferedImage image = toBufferedImage(bitMatrix);
            //切白边
            image = deleteWhite(bitMatrix);

            //转换成png格式的IO流
            ImageIO.write(image, "png", out);
            byte[] bytes = out.toByteArray();
@@ -87,11 +95,44 @@
                image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }

        return image;
    }

    /**
     * 切白边
     *
     * @param matrix
     * @return
     */
    private static BufferedImage deleteWhite(BitMatrix matrix) {
        int[] rec = matrix.getEnclosingRectangle();
        int resWidth = rec[2] + 1;
        int resHeight = rec[3] + 1;

        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
        resMatrix.clear();
        for (int i = 0; i < resWidth; i++) {
            for (int j = 0; j < resHeight; j++) {
                if (matrix.get(i + rec[0], j + rec[1]))
                    resMatrix.set(i, j);
            }
        }

        int width = resMatrix.getWidth();
        int height = resMatrix.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, resMatrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

    public static void main(String[] args) {
        String binary = QRCodeUtil.creatRrCode("https://baidu.com", 200,200,12);
        String binary = QRCodeUtil.creatRrCode("http://192.168.2.146:8089/upload/saasmobile.html?hospitolId=1&departmentId=1&doctorId=1278159153159888898&childid=3001&diagnosticId=300101&puuid=dbd8b1c0-bdc5-11ea-b37d-1b33e9f3fd18", 200, 200, 2);
        System.out.println(binary);
    }
}