生成二維碼
382696293@qq.com
2 years ago
parent
900a936eea
commit
b6df9a1056
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package com.flossom.system.controller;
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import com.flossom.common.core.exception.ServiceException;
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import com.flossom.system.utils.QrCodeUtil;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.ibatis.annotations.Param;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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@RestController
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@RequestMapping("/qrcode")
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public class QrCodeController {
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@Value("${qrcode.url}")
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private String qrcodeUrl;
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@GetMapping("create")
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public void create(HttpServletResponse response, @Param("serial") String serial) throws IOException {
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if (StringUtils.isBlank(serial)) {
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throw new ServiceException("请输入序列号");
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}
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if (StringUtils.isBlank(qrcodeUrl)) {
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throw new ServiceException("请配置二維碼地址");
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}
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QrCodeUtil.buildQrCodeImage(qrcodeUrl + serial, serial, response.getOutputStream());
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}
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}
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package com.flossom.system.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.decoder.ErrorCorrectionLevel;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.stereotype.Component;
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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.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Hashtable;
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/**
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* 生成二维码工具类.
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*/
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@Component
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public class QrCodeUtil {
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//二维码宽度
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private static final int QRCODE_SIZE = 430;
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//编码
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private static final String CHARSET = "utf-8";
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// 二维码绘制高度偏移量，留出空间写文字描述二维码信息
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private static final int OFFSET_HEIGHT = 25;
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//二维码标题字体
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private static final String TITLE_FONT = "黑体";
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// logo大小
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private static final int LOGO_PART = 4;
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//
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private static String FORMAT = "PNG";
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//标题前缀
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private static final String TITLE_PREFIX = "花至微信小程序序列码：";
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public static BufferedImage buildQrCodeImage(String content) {
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return createImage(content, null, null);
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}
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public static BufferedImage buildQrCodeImage(String content, String title) {
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return createImage(content, title, null);
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}
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public static BufferedImage buildQrCodeImage(String content, String title, String logoPath) {
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return createImage(content, title, logoPath);
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}
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public static void buildQrCodeImage(String content, OutputStream outputStream) {
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BufferedImage image = createImage(content, null, null);
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try {
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ImageIO.write(image, FORMAT, outputStream);
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} catch (IOException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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}
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public static void buildQrCodeImage(String content, String title, OutputStream outputStream) {
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BufferedImage image = createImage(content, title, null);
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try {
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ImageIO.write(image, FORMAT, outputStream);
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} catch (IOException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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}
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public static void buildQrCodeImage(String content, String title, String logoPath, OutputStream outputStream) {
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BufferedImage image = createImage(content, title, logoPath);
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try {
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ImageIO.write(image, FORMAT, outputStream);
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} catch (IOException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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}
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public static void buildQrCodeImage(String content, String title, String logoPath, String outputPath) {
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BufferedImage image = createImage(content, title, logoPath);
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try {
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FileOutputStream outputStream = new FileOutputStream(new File(outputPath));
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ImageIO.write(image, FORMAT, outputStream);
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} catch (IOException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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}
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public static Result analysisQrCode(BufferedImage image) {
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QRCodeReader qrCodeReader = new QRCodeReader();
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BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
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try {
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return qrCodeReader.decode(bitmap);
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} catch (Exception e) {
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throw new RuntimeException("解析二维码信息失败");
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}
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}
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public static Result analysisQrCode(String QrCodePath) {
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QRCodeReader qrCodeReader = new QRCodeReader();
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BufferedImage img = null;
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try {
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img = ImageIO.read(new File(QrCodePath));
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} catch (IOException e) {
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throw new RuntimeException("读取二维码失败");
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}
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BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(img)));
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try {
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return qrCodeReader.decode(bitmap);
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} catch (Exception e) {
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throw new RuntimeException("解析二维码失败");
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}
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}
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/**
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* 生成二维码.
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*
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* @param content 扫描成功的内容
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* @param title 二维码标题
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* @return 二维码图片
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*/
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private static BufferedImage createImage(String content, String title, String logoPath) {
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//等同于hashmap,hashtable是线程安全的
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Hashtable hints = new Hashtable();
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
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hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
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hints.put(EncodeHintType.MARGIN, 1);
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BitMatrix bitMatrix = null;
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try {
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bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
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} catch (WriterException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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int width = bitMatrix.getWidth();
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int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
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}
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}
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// 如果设置了二维码里面的logo 加入LOGO水印
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if (!StringUtils.isEmpty(logoPath)) {
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try {
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image = drawLogoForQR(image, logoPath);
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} catch (IOException e) {
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throw new RuntimeException("生成二维码信息异常，请稍后重试");
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}
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}
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//有标题，合成带标题的二维码
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if (StringUtils.isNotBlank(title)) {
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return drawTitleForQR(image, title);
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}
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//直接返回生成的二维码
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return image;
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}
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/**
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* 绘制二维码描述信息.
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*
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* @param source 源二维码图片
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* @param title 二维码标题
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* @return 合成后的图片
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*/
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private static BufferedImage drawTitleForQR(BufferedImage source, String title) {
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//新建模板图片
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BufferedImage bufferedImage = new BufferedImage(QRCODE_SIZE, QRCODE_SIZE + OFFSET_HEIGHT, BufferedImage.TYPE_INT_RGB);
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Graphics2D graphics = bufferedImage.createGraphics();
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//绘制矩形背景
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graphics.setColor(Color.white);
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graphics.fillRect(0, 0, QRCODE_SIZE, OFFSET_HEIGHT);
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//绘制描述信息
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Font font = new Font(TITLE_FONT, Font.PLAIN, 22);
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graphics.setColor(Color.black);
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graphics.setFont(font);
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graphics.drawString(TITLE_PREFIX + title, 20, OFFSET_HEIGHT - 2);
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//绘制二维码
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graphics.drawImage(source, 0, OFFSET_HEIGHT, QRCODE_SIZE, QRCODE_SIZE, null);
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graphics.dispose();
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return bufferedImage;
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}
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/**
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* 给二维码图片中绘制logo信息 非必须
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*
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* @param image 二维码图片
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* @param logoPath logo图片路径
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*/
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private static BufferedImage drawLogoForQR(BufferedImage image, String logoPath) throws IOException {
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Graphics2D g = image.createGraphics();
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BufferedImage logoImage = ImageIO.read(new File(logoPath));
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// 计算logo图片大小,可适应长方形图片,根据较短边生成正方形
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int width = image.getWidth() < image.getHeight() ? image.getWidth() / LOGO_PART : image.getHeight() / LOGO_PART;
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int height = width;
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// 计算logo图片放置位置
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int x = (image.getWidth() - width) / 2;
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int y = (image.getHeight() - height) / 2;
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// 在二维码图片上绘制中间的logo
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g.drawImage(logoImage, x, y, width, height, null);
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// 绘制logo边框,可选
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g.setStroke(new BasicStroke(2)); // 画笔粗细
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g.setColor(Color.WHITE); // 边框颜色
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g.drawRect(x, y, width, height); // 矩形边框
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logoImage.flush();
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g.dispose();
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return image;
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}
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}
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