1. <!-- 根据链接生成二维码 -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>
</dependencies>
2.util
package com.xinlianpu.util;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
/**
* Created by Mafy on 2019/5/9.
*/
public class ZxingUtils {
public static BufferedImage enQRCode(String contents, int width, int height) throws WriterException {
//定义二维码参数
final Map<EncodeHintType, Object> hints = new HashMap(8) {
{
//编码
put(EncodeHintType.CHARACTER_SET, "UTF-8");
//容错级别
put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//边距
put(EncodeHintType.MARGIN, 0);
}
};
return enQRCode(contents, width, height, hints);
}
/**
* 生成二维码
*
* @param contents 二维码内容
* @param width 图片宽度
* @param height 图片高度
* @param hints 二维码相关参数
* @return BufferedImage对象
* @throws WriterException 编码时出错
* @throws IOException 写入文件出错
*/
public static BufferedImage enQRCode(String contents, int width, int height, Map hints) throws WriterException {
// String uuid = UUID.randomUUID().toString().replace("-", "");
//本地完整路径
// String pathname = path + "/" + uuid + "." + format;
//生成二维码
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
// Path file = new File(pathname).toPath();
//将二维码保存到路径下
// MatrixToImageWriter.writeToPa(bitMatrix, format, file);
// return pathname;
return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
/**
* 将图片绘制在背景图上
*
* @param backgroundPath 背景图路径
* @param zxingImage 图片
* @param x 图片在背景图上绘制的x轴起点
* @param y 图片在背景图上绘制的y轴起点
* @return
*/
public static BufferedImage drawImage(String backgroundPath, BufferedImage zxingImage, int x, int y) throws IOException {
//读取背景图的图片流
BufferedImage backgroundImage;
//Try-with-resources 资源自动关闭,会自动调用close()方法关闭资源,只限于实现Closeable或AutoCloseable接口的类
URL imgurl = new URL(backgroundPath);
// try (InputStream imagein = new FileInputStream(backgroundPath)) {
// backgroundImage = ImageIO.read(imagein);
// }
try (InputStream imagein = new BufferedInputStream(imgurl.openStream())) {
backgroundImage = ImageIO.read(imagein);
}
return drawImage(backgroundImage, zxingImage, x, y);
}
/**
* 将图片绘制在背景图上
*
* @param backgroundImage 背景图
* @param zxingImage 图片
* @param x 图片在背景图上绘制的x轴起点
* @param y 图片在背景图上绘制的y轴起点
* @return
* @throws IOException
*/
public static BufferedImage drawImage(BufferedImage backgroundImage, BufferedImage zxingImage, int x, int y) throws IOException {
Objects.requireNonNull(backgroundImage, ">>>>>背景图不可为空");
Objects.requireNonNull(zxingImage, ">>>>>二维码不可为空");
//二维码宽度+x不可以超过背景图的宽度,长度同理
if ((zxingImage.getWidth() + x) > backgroundImage.getWidth() || (zxingImage.getHeight() + y) > backgroundImage.getHeight()) {
throw new IOException(">>>>>二维码宽度+x不可以超过背景图的宽度,长度同理");
}
//合并图片
Graphics2D g = backgroundImage.createGraphics();
g.drawImage(zxingImage, x, y,
zxingImage.getWidth(), zxingImage.getHeight(), null);
return backgroundImage;
}
/**
* 将文字绘制在背景图上
*
* @param backgroundImage 背景图
* @param x 文字在背景图上绘制的x轴起点
* @param y 文字在背景图上绘制的y轴起点
* @return
* @throws IOException
*/
public static BufferedImage drawString(BufferedImage backgroundImage, String text, int x, int y,Font font,Color color) {
//绘制文字
Graphics2D g = backgroundImage.createGraphics();
//设置颜色
g.setColor(color);
//消除锯齿状
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
//设置字体
g.setFont(font);
//绘制文字
g.drawString(text, x, y);
return backgroundImage;
}
public static InputStream bufferedImageToInputStream(BufferedImage backgroundImage) throws IOException {
return bufferedImageToInputStream(backgroundImage, "png");
}
/**
* backgroundImage 转换为输出流
*
* @param backgroundImage
* @param format
* @return
* @throws IOException
*/
public static InputStream bufferedImageToInputStream(BufferedImage backgroundImage, String format) throws IOException {
ByteArrayOutputStream bs = new ByteArrayOutputStream();
try (
ImageOutputStream
imOut = ImageIO.createImageOutputStream(bs)) {
ImageIO.write(backgroundImage, format, imOut);
InputStream is = new ByteArrayInputStream(bs.toByteArray());
return is;
}
}
/**
* 保存为文件
*
* @param is
* @param fileName
* @throws IOException
*/
public static void saveFile(InputStream is, String fileName) throws IOException {
try (BufferedInputStream in = new BufferedInputStream(is);
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(fileName))) {
int len;
byte[] b = new byte[1024];
while ((len = in.read(b)) != -1) {
out.write(b, 0, len);
}
}
}
//读取远程url图片,得到宽高
public static int[] returnImgWH(URL url) {
int[] a = new int[2];
BufferedImage bi = null;
boolean imgwrong=false;
try {
//读取图片
bi = javax.imageio.ImageIO.read(url);
try{
//判断文件图片是否能正常显示,有些图片编码不正确
int i = bi.getType();
imgwrong=true;
}catch(Exception e){
imgwrong=false;
}
} catch (IOException ex) {
ex.printStackTrace();
}
if(imgwrong){
a[0] = bi.getWidth(); //获得 宽度
a[1] = bi.getHeight(); //获得 高度
}else{
a=null;
}
return a;
}
public static void main(String[] args) {
//二维码宽度
int width = 293;
//二维码高度
int height = 293;
//二维码内容
String contcent = "http://192.168.4.162:8802/portal/courseActivity/detail?id=aed2fabfde70409ea0611d4eaf05dd6e:3b8b77dd-a63b-4555-abc0-2c0033af35be";
BufferedImage zxingImage = null;
try {
//二维码图片流
zxingImage = ZxingUtils.enQRCode(contcent, width, height);
} catch (WriterException e) {
e.printStackTrace();
}
//背景图片地址
String backgroundPath = "http://test-dfs.enterfaces.com/M00/00/51/CgYBa1zRe4iAM5e9AAEUUh_Ua8g311.jpg";
InputStream inputStream = null;
try {
URL url = new URL(backgroundPath);
int[] bb = returnImgWH(url);
//合成二维码和背景图
BufferedImage image = ZxingUtils.drawImage(backgroundPath, zxingImage, bb[0]-width, bb[1]-height);
// //-----------------------------------------绘制文字-----------------------------------------------------
// Font font = new Font("微软雅黑", Font.BOLD, 35);
// String text = "";
// image = ZxingUtils.drawString(image, text, 375, 647,font,new Color(244,254,189));
// //-----------------------------------------绘制文字-----------------------------------------------------
//图片转inputStream
inputStream = ZxingUtils.bufferedImageToInputStream(image);
} catch (IOException e) {
e.printStackTrace();
}
//保存的图片路径
String originalFileName = "D://99999.png";
try {
//保存为本地图片
ZxingUtils.saveFile(inputStream, originalFileName);
} catch (IOException e) {
e.printStackTrace();
}
}
}