package com.kidgrow.common.utils;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.EncodeHintType;
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import com.google.zxing.MultiFormatWriter;
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import com.google.zxing.WriterException;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
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import sun.misc.BASE64Encoder;
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import javax.imageio.ImageIO;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.Hashtable;
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import static com.google.zxing.client.j2se.MatrixToImageConfig.BLACK;
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import static com.google.zxing.client.j2se.MatrixToImageConfig.WHITE;
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/**
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* @Author: dougang
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* @Description:
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* @Date: create in 2020/6/19 10:02
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*/
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public class QRCodeUtil {
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/**
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* 生成二维码
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*
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* @param contents
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* @param width
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* @param height
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* @param level 0:M,1:L,2:H,3:Q
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* @return
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*/
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public static String creatRrCode(String contents, int width, int height, int level) {
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String binary = null;
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Hashtable hints = new Hashtable();
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hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
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switch (level) {
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case 0:
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
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break;
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case 1:
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
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break;
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case 2:
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
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break;
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case 3:
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);
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break;
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default:
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break;
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}
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try {
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BitMatrix bitMatrix = new MultiFormatWriter().encode(
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contents, BarcodeFormat.QR_CODE, width, height, hints);
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// 读取文件转换为字节数组
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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BufferedImage image = toBufferedImage(bitMatrix);
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//切白边
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image = deleteWhite(bitMatrix);
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//转换成png格式的IO流
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ImageIO.write(image, "png", out);
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byte[] bytes = out.toByteArray();
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// 将字节数组转为二进制
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BASE64Encoder encoder = new BASE64Encoder();
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binary = "data:image/png;base64," + encoder.encodeBuffer(bytes).trim();
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} catch (WriterException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IOException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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return binary;
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}
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/**
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* image流数据处理
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*
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* @author ianly
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*/
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private static BufferedImage toBufferedImage(BitMatrix matrix) {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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for (int x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
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}
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}
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return image;
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}
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/**
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* 切白边
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*
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* @param matrix
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* @return
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*/
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private static BufferedImage deleteWhite(BitMatrix matrix) {
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int[] rec = matrix.getEnclosingRectangle();
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int resWidth = rec[2] + 1;
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int resHeight = rec[3] + 1;
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BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
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resMatrix.clear();
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for (int i = 0; i < resWidth; i++) {
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for (int j = 0; j < resHeight; j++) {
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if (matrix.get(i + rec[0], j + rec[1]))
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resMatrix.set(i, j);
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}
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}
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int width = resMatrix.getWidth();
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int height = resMatrix.getHeight();
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BufferedImage image = new BufferedImage(width, height,
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BufferedImage.TYPE_INT_RGB);
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for (int x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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image.setRGB(x, y, resMatrix.get(x, y) ? BLACK : WHITE);
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}
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}
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return image;
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}
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public static void main(String[] args) {
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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);
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System.out.println(binary);
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}
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}
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