zxing springboot 二维码
zxing框架生成带log的二维码
- 新建一个springboot项目
- pom.xml中加入依赖
<dependency>
<groupId>com.google.zxinggroupId>
<artifactId>coreartifactId>
<version>3.3.0version>
dependency>
<dependency>
<groupId>net.glxngroupId>
<artifactId>qrgenartifactId>
<version>1.4version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
dependency>
- 书写二维码生成工具类
package com.example.demo;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 二维码生成和解析工具类
*
* @author Administrator
*
*/
public class QRCodeUtil {
// 二维码颜色==黑色
private static final int BLACK = 0xFF000000;
// 二维码颜色==白色
private static final int WHITE = 0xFFFFFFFF;
// 二维码图片格式==jpg和png两种
private static final List IMAGE_TYPE = new ArrayList();
static {
IMAGE_TYPE.add("jpg");
IMAGE_TYPE.add("png");
}
/**
* zxing方式生成二维码
* 注意：
* 1,文本生成二维码的方法独立出来,返回image流的形式,可以输出到页面
* 2,设置容错率为最高,一般容错率越高,图片越不清晰, 但是只有将容错率设置高一点才能兼容logo图片
* 3,logo图片默认占二维码图片的20%,设置太大会导致无法解析
* @param content 二维码包含的内容，文本或网址
* @param path 生成的二维码图片存放位置
* @param size 生成的二维码图片尺寸 可以自定义或者默认（250）
* @param logoPath logo的存放位置
*/
public static boolean zxingCodeCreate(String content, String path, Integer size,String logoPath) {
try {
String imageType = path.substring(path.lastIndexOf(".") + 1).toLowerCase();
if (!IMAGE_TYPE.contains(imageType)) {
return false;
}
//获取二维码流的形式，写入到目录文件中
BufferedImage image = getBufferedImage(content,size,logoPath);
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
ImageIO.write(image, imageType, file);
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 二维码流的形式，包含文本内容
* @param content 二维码文本内容
* @param size 二维码尺寸
* @param logoPath logo的存放位置
* @return
*/
public static BufferedImage getBufferedImage (String content,Integer size,String logoPath) {
if (size == null || size <= 0) {
size = 250;
}
BufferedImage image = null;
try {
// 设置编码字符集
Map hints = new HashMap();
//设置编码
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
//设置容错率最高
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.MARGIN, 1);
// 1、生成二维码
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, size, size, hints);
// 2、获取二维码宽高
int codeWidth = bitMatrix.getWidth();
int codeHeight = bitMatrix.getHeight();
// 3、将二维码放入缓冲流
image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
for (int i = 0; i < codeWidth; i++) {
for (int j = 0; j < codeHeight; j++) {
// 4、循环将二维码内容定入图片
image.setRGB(i, j, bitMatrix.get(i, j) ? BLACK : WHITE);
}
}
//判断是否写入logo图片
if (logoPath != null && !"".equals(logoPath)) {
File logoPic = new File(logoPath);
if (logoPic.exists()) {
Graphics2D g = image.createGraphics();
BufferedImage logo = ImageIO.read(logoPic);
int widthLogo = logo.getWidth(null) > image.getWidth() * 2 / 10 ?
(image.getWidth() * 2 / 10) : logo.getWidth(null);
int heightLogo = logo.getHeight(null) > image.getHeight() * 2 / 10 ?
(image.getHeight() * 2 / 10) : logo.getHeight(null);
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
// 开始绘制图片
g.drawImage(logo, x, y, widthLogo, heightLogo, null);
g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
//边框宽度
g.setStroke(new BasicStroke(2));
//边框颜色
g.setColor(Color.WHITE);
g.drawRect(x, y, widthLogo, heightLogo);
g.dispose();
logo.flush();
image.flush();
}
}
} catch (WriterException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
/**
* 给二维码图片添加Logo
*
* @param qrPic 二维码图片
* @param logoPic logo图片
* @param path 合成后的图片存储目录
*/
public static boolean zxingCodeCreate(File qrPic, File logoPic,String path) {
try {
String imageType = path.substring(path.lastIndexOf(".") + 1).toLowerCase();
if (!IMAGE_TYPE.contains(imageType)) {
return false;
}
if (!qrPic.isFile() && !logoPic.isFile()) {
return false;
}
/**
* 读取二维码图片，并构建绘图对象
*/
BufferedImage image = ImageIO.read(qrPic);
Graphics2D g = image.createGraphics();
/**
* 读取Logo图片
*/
BufferedImage logo = ImageIO.read(logoPic);
/**
* 设置logo的大小,最多20%0
*/
int widthLogo = logo.getWidth(null) > image.getWidth() * 2 / 10 ?
(image.getWidth() * 2 / 10) : logo.getWidth(null);
int heightLogo = logo.getHeight(null) > image.getHeight() * 2 / 10 ?
(image.getHeight() * 2 / 10) : logo.getHeight(null);
// 计算图片放置位置，默认在中间
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
// 开始绘制图片
g.drawImage(logo, x, y, widthLogo, heightLogo, null);
g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
//边框宽度
g.setStroke(new BasicStroke(2));
//边框颜色
g.setColor(Color.WHITE);
g.drawRect(x, y, widthLogo, heightLogo);
g.dispose();
logo.flush();
image.flush();
File newFile = new File(path);
if (!newFile.exists()) {
newFile.mkdirs();
}
ImageIO.write(image, imageType,newFile);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* zxing方式生成二维码的解析方法
* @param path 二维码图片目录
* @return
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static Result zxingCodeAnalyze(String path) {
try {
MultiFormatReader formatReader = new MultiFormatReader();
File file = new File(path);
if (file.exists()) {
BufferedImage image = ImageIO.read(file);
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
Result result = formatReader.decode(binaryBitmap, hints);
return result;
}
} catch (IOException e) {
e.printStackTrace();
} catch (NotFoundException e) {
e.printStackTrace();
}
return null;
}
} - 调用工具类
package com.example.demo;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.google.zxing.Result;
@RestController
public class QrcodeController {
@RequestMapping("/productcode")
public void productcode() {
QRCodeUtil.zxingCodeCreate("http://www.runoob.com/html/html-images.html", "L:\\cc.jpg",500,"C:\\Users\\LMS\\Desktop\\img\\0101.jpg");
}
@RequestMapping("/analysiscode")
public void analysiscode() {
Result result = QRCodeUtil.zxingCodeAnalyze("L:\\aa.jpg");
System.err.println("二维码解析内容："+result.toString());
}
}- 端口设定
server.port=1245- 启动类
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Qrcode21Application {
public static void main(String[] args) {
SpringApplication.run(Qrcode21Application.class, args);
}
}测试
生成二维码地址：http://192.168.31.32:1245/productcode 会在对应的目录下生成二维码（可以穿logo也可以不传logo）
解析二维码地址：http://192.168.31.32:1245/analysiscode
控制台输出：
二维码解析内容：http://www.baidu.com参考文章
- zxing生成和解析带logo二维码 ： https://blog.csdn.net/MyNoteBlog/article/details/71054011
- 谷歌zxing实现二维码生成和解析_http://kesun-shy.iteye.com/blog/2154169 ：https://blog.csdn.net/a363722188/article/details/51724768
备注
- 二维码在浏览器的显示未实现，但是可以通过下面代码直接获取二维码图片
<html>
<head>
<meta charset="UTF-8">
<title>Insert title heretitle>
head>
<body>
this is a photo
<img src= "L:\aa.jpg" />
body>
html>补充
- 在线生成和下载二维码（两者不能共存）
- servlet 类
package com.example.demo;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* 网页在线生成二维码
* 下载二维码和在线生成二维码不能共存
*/
public class QRcodeServlet extends HttpServlet{
private static final long serialVersionUID = 4905664814789638877L;
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setCharacterEncoding("utf-8");
//生成二维码图片 =========== 文字内容 ， 二维码长度，logo的存放位置
BufferedImage bufImage = QRCodeUtil.getBufferedImage("我的二维码201", 500,"C:\\Users\\LMS\\Desktop\\img\\0303.jpg");
//直接打开图片
resp.setContentType("image/jpg");
//直接下载图片===下载后图片存放的位置：Windows系统有一个默认的位置，只需要一个文件名即可
// resp.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("qq.png", "UTF-8"));
//将图片写出到浏览器
OutputStream out = resp.getOutputStream();
ImageIO.write(bufImage, "jpg", out);
out.close();
}
}- controller类
package com.example.demo;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.google.zxing.Result;
@RestController
public class QrcodeController {
@RequestMapping("/onlineCode")
public void brower(HttpServletRequest req, HttpServletResponse resp) {
QRcodeServlet qRcodeServlet = new QRcodeServlet();
try {
qRcodeServlet.doGet(req, resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}- 浏览器访问便可知道生成的二维码：http://192.168.31.32:1245/onlineCode