1、添加依赖包
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>
2、生成二维码图片的工具类
package com.smartsite.util;
import cn.hutool.extra.qrcode.QrCodeUtil;
import cn.hutool.extra.qrcode.QrConfig;
import com.smartsite.base.Constant;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.net.URL;
@Slf4j
public class CardGraphicsUtil {
private CardGraphicsUtil() {
super();
}
public static final String FONT = "宋体";
public static final Color HUAXI_COLOR_GREEN = new Color(0, 122, 55);
private static BufferedImage image;
//图片的宽度
private static final int imageWidth = 430;
//图片的高度
private static final int imageHeight = 250;
/**
* 生成名片
*
* @param qrUrl 二维码url
* @param logoUrl logo url
* @param title 标题
* @param backgroundColor 背景色
* @param foreColor 前景色
* @param items 显示内容
* @return
*/
public static BufferedImage generate(String qrUrl, String logoUrl, String title, Color backgroundColor, Color foreColor, Item... items) {
if (null == qrUrl) {
qrUrl = "";
}
if (null == logoUrl) {
logoUrl = "";
}
if (null == title) {
title = "";
}
if (null == items) {
items = new Item[0];
}
if(null == backgroundColor){
backgroundColor = Color.black;
}
if(null == foreColor){
foreColor = Color.white;
}
//头部高度
int H_title = 50;
image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
//画布背景
Graphics2D main = image.createGraphics();
//设置图片的背景色
main.setColor(backgroundColor);
main.fillRect(0, 0, imageWidth, imageHeight);
//logo
if (!ComUtil.isEmpty(logoUrl) && (logoUrl.toLowerCase().startsWith("http://") || logoUrl.toLowerCase().startsWith("https://"))){
Graphics dPic = image.getGraphics();
BufferedImage dimg = null;
try {
dimg = javax.imageio.ImageIO.read(new URL(logoUrl));
} catch (Exception e) {
log.error(e.getMessage(),e);
}
if (dimg != null) {
dPic.setClip(new RoundRectangle2D.Double(10, 5, 40, 40, 0, 0));
dPic.drawImage(dimg, 10, 5, 40, 40, null);
dPic.dispose();
}
}
//标题
Graphics titleImg = image.createGraphics();
//设置区域颜色
titleImg.setColor(backgroundColor);
//填充区域并确定区域大小位置
titleImg.fillRect(50, 0, imageWidth - 50, H_title);
//设置字体颜色，先设置颜色，再填充内容
titleImg.setColor(foreColor);
//设置字体
Font titleFont = new Font(FONT, Font.BOLD, 18);
titleImg.setFont(titleFont);
titleImg.drawString(title, 60, 35);
//横杠
Graphics lineImg = image.createGraphics();
//设置区域颜色
lineImg.setColor(foreColor);
//填充区域并确定区域大小位置
lineImg.fillRect(10, 50, imageWidth - 20, 1);
if (items.length > 0) {
//详细信息
Graphics itemsImg = image.createGraphics();
//设置区域颜色
titleImg.setColor(backgroundColor);
//填充区域并确定区域大小位置
titleImg.fillRect(12, 60, imageWidth - 200, 340);
for (int i = 0; i < items.length; i++) {
Item item = items[i];
if (ComUtil.isEmpty(item)) {
break;
}
//设置字体颜色，先设置颜色，再填充内容
titleImg.setColor(foreColor);
//设置字体
Font itemFont = new Font(FONT, Font.PLAIN, 14);
titleImg.setFont(itemFont);
titleImg.drawString(item.getName() + Constant.COLON + item.getValue(), 20, 25 * i + 80);
}
}
//插入二维码
Graphics qrImg = image.getGraphics();
BufferedImage bimg = null;
try {
QrConfig config = new QrConfig(180, 180);
config.setBackColor(backgroundColor.getRGB());
config.setForeColor(foreColor.getRGB());
bimg = QrCodeUtil.generate(qrUrl, config);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
if (bimg != null) {
qrImg.drawImage(bimg, 240, 65, 180, 180, null);
qrImg.dispose();
}
return image;
}
/**
* 图片切圆角
*
* @param srcImage
* @param radius
* @return
*/
public static BufferedImage setClip(BufferedImage srcImage, int radius) {
int width = srcImage.getWidth();
int height = srcImage.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D gs = image.createGraphics();
gs.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gs.setClip(new RoundRectangle2D.Double(0, 0, width, height, radius, radius));
gs.drawImage(srcImage, 0, 0, null);
gs.dispose();
return image;
}
public static Color getColor(int rgb) {
return new Color(rgb);
}
/**
* r,g,b-> int
* @param r
* @param g
* @param b
* @return rgb整型值
*/
public static int getColor(int r,int g,int b) {
return ((0xFF << 24)|(r << 16)|(g << 8)|b);
}
@Data
@AllArgsConstructor
public static class Item {
private String name;
private String value;
}
}
3、Controller 接口
/**
*获取二维码接口
*/
@ApiOperation(value = "qr")
@Pass
@GetMapping("/qr")
public void qr(HttpServletResponse response) throws IOException {
checkLocationService.generateQrCode(response);
}
4、Services
/**
* 生成二维码
* @param response
* @throws IOException
*/
@Override
public void generateQrCode(HttpServletResponse response)throws IOException {
ServletOutputStream os = response.getOutputStream();
CardGraphicsUtil.Item[] items = new CardGraphicsUtil.Item[]{
new CardGraphicsUtil.Item("001号配电箱","001号配电箱"),
new CardGraphicsUtil.Item("巡检项目","配电箱"),
new CardGraphicsUtil.Item("规格","一级配电箱"),
new CardGraphicsUtil.Item("位置","1号楼"),
new CardGraphicsUtil.Item("楼层","5F"),
new CardGraphicsUtil.Item("负责人","王三张(13888888888)"),
new CardGraphicsUtil.Item("负责人","李四(13888888888)")
};
//生成名片
BufferedImage card = CardGraphicsUtil.generate("\"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1581913301580&di=f1e50a119aa7683fa221c145576a1cc1&imgtype=0&src=http%3A%2F%2Fa0.att.hudong.com%2F78%2F52%2F01200000123847134434529793168.jpg\"", "\"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1581913301580&di=f1e50a119aa7683fa221c145576a1cc1&imgtype=0&src=http%3A%2F%2Fa0.att.hudong.com%2F78%2F52%2F01200000123847134434529793168.jpg\"","二维码的title", CardGraphicsUtil.HUAXI_COLOR_GREEN, Color.white, items);
//圆角处理
card=CardGraphicsUtil.setClip(card,30);
ImageIO.write(card,"PNG",os);
os.flush();
os.close();
}
5、最后效果图
QR.png
注意一下，在实际Linux系统部署的时候，遇到了乱码的问题，是因为Linux系统差一个相应的字体，代码中用到的是宋体，直接在C:\Windows\Fonts下找到宋体的ttf，将其拷贝到Linux系统下的Java安装的相应路径下（/usr/java/jdk1.8.0_211-amd64/jre/lib/fonts），重启Linux即可生效
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