93 lines
3.5 KiB
Java
93 lines
3.5 KiB
Java
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package com.fuint.utils;
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import com.google.zxing.*;
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import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.common.HybridBinarizer;
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import com.google.zxing.qrcode.QRCodeReader;
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import com.google.zxing.qrcode.QRCodeWriter;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.*;
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import java.util.HashMap;
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/**
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* 二维码生成工具类
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*
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* Created by FSQ
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* CopyRight https://www.fuint.cn
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*/
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public class QRCodeUtil {
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public static final Logger logger = LoggerFactory.getLogger(QRCodeUtil.class);
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/**
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* 生成包含字符串信息的二维码图片
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*
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* @param outputStream 文件输出流路径
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* @param content 二维码携带信息
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* @param width 宽度
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* @param height 高度
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* @param imageFormat 二维码的格式
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*/
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public static boolean createQrCode(OutputStream outputStream, String content, int width, int height, String imageFormat) {
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//设置二维码纠错级别
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HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
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hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
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width = width + 200;
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height = height + 200;
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try {
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//创建比特矩阵(位矩阵)的QR码编码的字符串
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QRCodeWriter qrCodeWriter = new QRCodeWriter();
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BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
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// 使BufferedImage勾画QRCode (matrixWidth 是行二维码像素点)
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int matrixWidth = byteMatrix.getWidth();
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BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);
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// 使用比特矩阵画并保存图像
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image.createGraphics();
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Graphics2D graphics = (Graphics2D) image.getGraphics();
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graphics.setColor(Color.WHITE);
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graphics.fillRect(0, 0, matrixWidth, matrixWidth);
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graphics.setColor(Color.BLACK);
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for (int i = 0; i < matrixWidth; i++) {
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for (int j = 0; j < matrixWidth; j++) {
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if (byteMatrix.get(i, j)) {
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graphics.fillRect(i - 100, j - 100, 1, 1);
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}
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}
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}
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return ImageIO.write(image, imageFormat, outputStream);
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} catch (Exception e) {
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logger.error(e.getMessage(), e);
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}
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return false;
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}
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/**
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* 读二维码并输出携带的信息
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*/
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public static void readQrCode(InputStream inputStream) throws IOException {
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//设置二维码纠错级别
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HashMap<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();
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hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
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//从输入流中获取字符串信息
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BufferedImage image = ImageIO.read(inputStream);
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//将图像转换为二进制位图源
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LuminanceSource source = new BufferedImageLuminanceSource(image);
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BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
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QRCodeReader reader = new QRCodeReader();
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Result result = null;
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try {
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result = reader.decode(bitmap, hints);
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} catch (ReaderException e) {
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logger.error(e.getMessage(), e);
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}
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logger.info(result.getText());
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}
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}
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