spring-boot-qrcode
介绍
SpringBoot整合二维码,使用Google提供的二维码依赖架包.实现二维码文件的生成和前端的显示
安装教程
- 导入依赖
<!--导入二维码依赖-->
<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>- 编写二维码工具类
package com.moti.springbootqrcode.utils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;
/**
* @Description 二维码生成工具类
* @Author xw
* @Date 12:14 2020/2/12
* @Param * @param null
* @return
**/
public class QRCodeUtil {
//编码
private static final String CHARSET = "utf-8";
//文件格式
private static final String FORMAT = "JPG";
// 二维码尺寸
private static final int QRCODE_SIZE = 300;
// LOGO宽度
private static final int LOGO_WIDTH = 60;
// LOGO高度
private static final int LOGO_HEIGHT = 60;
/**
* @Description 生成二维码
* @Author xw
* @Date 12:14 2020/2/12
* @Param [content, logoPath, needCompress] 内容,logo路径,是否压缩
* @return java.awt.image.BufferedImage
**/
public static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
if (logoPath == null || "".equals(logoPath)) {
return image;
}
// 插入图片
QRCodeUtil.insertImage(image, logoPath, needCompress);
return image;
}
/**
* @Description 插入logo
* @Author xw
* @Date 12:15 2020/2/12
* @Param [source, logoPath, needCompress] 二维码图片,logo路径,是否压缩
* @return void
**/
private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws IOException {
InputStream inputStream = null;
try {
inputStream = QRCodeUtil.getResourceAsStream(logoPath);
Image src = ImageIO.read(inputStream);
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) {
// 压缩LOGO
width = width>LOGO_WIDTH?LOGO_WIDTH:width;
height = height>LOGO_HEIGHT?LOGO_HEIGHT:height;
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null);
// 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
} finally {
if (inputStream != null) {
inputStream.close();
}
}
}
/**
* @Description 生成二维码,获得到输出流 ,logo内嵌
* @Author xw
* @Date 12:16 2020/2/12
* @Param [content, logoPath, output, needCompress] 内容,logo路径,输出流,是否压缩
* @return void
**/
public static void encode(String content, String logoPath, OutputStream output, boolean needCompress)
throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
ImageIO.write(image, FORMAT, output);
}
/**
* @Description 获取指定文件的输入流，获取logo
* @Author xw
* @Date 12:17 2020/2/12
* @Param [logoPath] logo路径
* @return java.io.InputStream
**/
public static InputStream getResourceAsStream(String logoPath) {
return QRCodeUtil.class.getResourceAsStream(logoPath);
}
}- 编写Controller
package com.moti.springbootqrcode.controller;
import com.moti.springbootqrcode.utils.QRCodeUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Map;
/**
* @ClassName: HelloController
* @Description: TODO
* @author: xw
* @date 2020/2/12 11:25
* @Version: 1.0
**/
@Controller
public class HelloController {
@RequestMapping("/hello")
public String createQrCode(HttpServletRequest request, HttpServletResponse response, Map<String,Object> map) {
//分享的文件ID
Integer myFileId = 1;
try {
String path = request.getSession().getServletContext().getRealPath("/user_img/");
File targetFile = new File(path, "");
if (!targetFile.exists()) {
targetFile.mkdirs();
}
File file = new File(path, myFileId + ".jpg");
if (!file.exists()){
//文件不存在,开始生成二维码并保存文件
OutputStream os = new FileOutputStream(file);
QRCodeUtil.encode("http://xuewei.world", "/static/images/head.png", os, true);
os.close();
}
} catch (Exception e) {
e.printStackTrace();
map.put("path","https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=2654852821,3851565636&fm=26&gp=0.jpg");
}
map.put("path","user_img/"+myFileId+".jpg");
return "index";
}
}
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