SpringBoot 二维码生成base64并上传OSS的实现示例

SpringBoot 二维码生成base64并上传OSS的实现示例

目录基础环境代码实现1.添加依赖2.工具类3.测试生成4.base64 转换为图片在线工具5.base64图片上传oss

基础环境

SpringBoot、Maven

代码实现

1.添加依赖

com.google.zxing

core

3.3.3

com.google.zxing

javase

3.3.3

2.工具类

package com.milu.boss.common.util;

import cn.hutool.core.codec.Base64;

import cn.hutool.core.util.StrUtil;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

ihttp://mport com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.QRCodeWriter;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import lombok.extern.slf4j.Slf4j;

import org.springframework.stereotype.Component;

import javax.imageio.ImageIO;

import javax.servlet.ServletOutputStream;

import java.awt.*;

import java.awt.geom.RoundRectangle2D;

import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java-.URL;

import java.util.HashMap;

/**

* 链接二维码生成工具

* @author qzz

*/

@Slf4j

@Component

public class QrCodeUtil {

/**

* 默认宽度

*/

private static final Integer WIDTH = 140;

/**

* 默认高度

*/

private static final Integer HEIGHT = 140;

/**

* LOGO 默认宽度

*/

private static final Integer LOGO_WIDTH = 22;

/**

* LOGO 默认高度

*/

private static final Integer LOGO_HEIGHT = 22;

/**

* 图片格式

*/

private static final String IMAGE_FORMAT = "png";

private static final String CHARSET = "utf-8";

/**

* 原生转码前面没有 data:image/png;base64 这些字段，返回给前端是无法被解析

*/

private static final String BASE64_IMAGE = "data:image/png;base64,%s";

/**

* 生成二维码，使用默认尺寸

*

* @param content 内容

* @return

*/

public String getBase64QRCode(String content) {

return getBase64Image(content, WIDTH, HEIGHT, null, null, null);

}

/**

* 生成二维码，使用默认尺寸二维码，插入默认尺寸logo

*

* @param content 内容

* @param logoUrl logo地址

* @return

*/

public String getBase64QRCode(String content, String logoUrl) {

return getBase64Image(content, WIDTH, HEIGHT, logoUrl, LOGO_WIDTH, LOGO_HEIGHT);

}

/**

http:// * 生成二维码

*

* @param content 内容

* @param width 二维码宽度

* @param height 二维码高度

* @param logoUrl logo 在线地址

* @param logoWidth logo 宽度

* @param logoHeight logo 高度

* @return

*/

public String getBase64QRCode(String content, Integer width, Integer height, String logoUrl, Integer logoWidth, Integer logoHeight) {

return getBase64Image(content, width, height, logoUrl, logoWidth, logoHeight);

}

private String getBase64Image(String content, Integer width, Integer height, String logoUrl, Integer logoWidth, Integer logoHeight) {

ByteArrayOutputStream os = new ByteArrayOutputStream();

BufferedImage bufferedImage = crateQRCode(content, width, height, logoUrl, logoWidth, logoHeight);

try {

ImageIO.write(bufferedImage, IMAGE_FORMAT, os);

} catch (IOException e) {

log.error("[生成二维码，错误{}]", e);

}

// 转出即可直接使用

return String.format(BASE64_IMAGE, Base64.encode(os.toByteArray()));

}

/**

* 生成二维码

*

* @param content 内容

* @param width 二维码宽度

* @param height 二维码高度

* @param logoUrl logo 在线地址

* @param logoWidth logo 宽度

* @param logoHeight logo 高度

* @return

*/

private BufferedImage crateQRCode(String content, Integer width, Integer height, String logoUrl, Integer logoWidth, Integer logoHeight) {

if (StrUtil.isNotBlank(content)) {

ServletOutputStream stream = null;

HashMap hints = new HashMap<>(4);

// 指定字符编码为utf-8

hints.put(EncodeHintType.CHARACTER_SET, CHARSET);

// 指定二维码的纠错等级为中级

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);

// 设置图片的边距

hints.put(EncodeHintType.MARGIN, 2);

try {

QRCodeWriter writer = new QRCodeWriter();

BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);

BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

for (int x = 0; x < width; x++) {

for (int y = 0; y < height; y++) {

bufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);

}

}

if (StrUtil.isNotBlank(logoUrl)) {

insertLogo(bufferedImage, width, height, logoUrl, logoWidth, logoHeight);

}

return bufferedImage;

} catch (Exception e) {

e.printStackTrace();

} finally {

if (stream != null) {

try {

stream.flush();

stream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

return null;

}

/**

* 二维码插入logo

*

* @param source 二维码

* @param width 二维码宽度

* @param height 二维码高度

* @param logoUrl logo 在线地址

* @param logoWidth logo 宽度

* @param logoHeight logo 高度

* @throws Exception

*/

private void insertLogo(BufferedImage source, Integer width, Integer height, String logoUrl, Integer logoWidth, Integer logoHeight) throws Exception {

// logo 源可为 File/InputStream/URL

Image src = ImageIO.read(new URL(logoUrl));

// 插入LOGO

Graphics2D graph = source.createGraphics();

int x = (width - logoWidth) / 2;

int y = (height - logoHeight) / 2;

http:// graph.drawImage(src, x, y, logoWidth, logoHeight, null);

Shape shape = new RoundRectangle2D.Float(x, y, logoWidth, logoHeight, 6, 6);

graph.setStroke(new BasicStroke(3f));

graph.draw(shape);

graph.dispose();

}

/**

* 获取二维码

*

* @param content 内容

* @param output 输出流

* @throws IOException

*/

public void getQRCode(String content, OutputStream output) throws IOException {

BufferedImage image = crateQRCode(content, WIDTH, HEIGHT, null, null, null);

ImageIO.write(image, IMAGE_FORMAT, output);

}

/**

* 获取二维码

*

* @param content 内容

* @param logoUrl logo资源

* @param output 输出流

* @throws Exception

*/

public void getQRCode(String content, String logoUrl, OutputStream output) throws Exception {

BufferedImage image = crateQRCode(content, WIDTH, HEIGHT, logoUrl, LOGO_WIDTH, LOGO_HEIGHT);

ImageIO.write(image, IMAGE_FORMAT, output);

}

}

3.测试生成

public static void main(String[] args) {

QrCodeUtil qrCodeUtil=new QrCodeUtil();

String content="https://baidu.com/";

String logoUrl="https://baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png";

String url =qrCodeUtil.getBase64QRCode(content, logoUrl);

System.out.println(url);

}

执行结果：Base64 字符串

data:image/png;base64,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

4.base64 转换为图片在线工具

http://tools.jb51-/transcoding/img2base64

5.base64图片上传oss

5.1 base64图片 转 MultipartFile

package com.milu.boss.common.util;

/**

* base64转multipartfile工具类

* @author qzz

*/

import org.springframework.web.multipart.MultipartFile;

import sun.misc.BASE64Decoder;

import java.io.*;

/**

* base64转MultipartFile

*/

public class BASE64DecodedMultipartFile implements MultipartFile {

private final byte[] imgContent;

private final String header;

/**

*

* @param imgContent

* @param header

*/

public BASE64DecodedMultipartFile(byte[] imgContent, String header) {

this.imgContent = imgContent;

this.header = header.split(";")[0];

}

@Override

public String getName() {

return System.currentTimeMillis() + Math.random() + "." + header.split("/")[1];

}

@Override

public String getOriginalFilename() {

return System.currentTimeMillis() + (int) Math.random() * 10000 + "." + header.split("/")[1];

}

@Override

public String getContentType() {

return header.split(":")[1];

}

@Override

public boolean isEmpty() {

return imgContent == null || imgContent.length == 0;

}

@Override

public long getSize() {

return imgContent.length;

}

@Override

public byte[] getBytes() throws IOException {

return imgContent;

}

@Override

public InputStream getInputStream() throws IOException {

return new ByteArrayInputStream(imgContent);

}

@Override

public void transferTo(File dest) throws IOException, IllegalStateException {

new FileOutputStream(dest).write(imgContent);

}

public static MultipartFile base64ToMultipart(String base64) {

try {

String[] baseStrs = base64.split(",");

BASE64Decoder decoder = new BASE64Decoder();

byte[] b = new byte[0];

b = decoder.decodeBuffer(baseStrs[1]);

for (int i = 0; i < b.length; ++i) {

if (b[i] < 0) {

b[i] += 256;

}

}

return new BASE64DecodedMultipartFile(b, baseStrs[0]);

} catch http://(IOException e) {

e.printStackTrace();

return null;

}

}

/**

* base64 转 MultipartFile，获取对应的InputStream

* @param base64

* @return

*/

public static InputStream getQrCodeInputStream(String base64){

MultipartFile multipartFile = BASE64DecodedMultipartFile.base64ToMultipart(base64);

try {

return multipartFile.getInputStream();

} catch (IOException e) {

return null;

}

}

}

base64图片转MultipartFile ：

MultipartFile multipartFile = BASE64DecodedMultipartFile.base64ToMultipart(base64);

5.2 MultipartFile 上传oss

/**

* base64 转 MultipartFile，获取对应的InputStream

* @param base64

* @return

*/

public static InputStream getQrCodeInputStream(String base64){

MultipartFile multipartFile = BASE64DecodedMultipartFile.base64ToMultipart(base64);

try {

return multipartFile.getInputStream();

} catch (IOException e) {

return null;

}

}

图片流上传oos：

/**

* 图片流上传oos

* @param fis

* @return

*/

public String uploadImageUrl(InputStream fis){

String url = "";

try {

String fileExt = "png";;

//生成新的文件名

String newfilename = "file/";

Date now = new Date();

SimpleDateFormat date = new SimpleDateFormat("yyyyMMdd");

newfilename += date.format(now) + "/";

SimpleDateFormat time = new SimpleDateFormat("HHmmssSSS");

newfilename += time.format(now);

newfilename += "_" + new Random().nextInt(1000) + "." + fileExt;

ossService.upload(newfilename, fis);

url = "配置的阿里云OSS图片地址OSS_PIC_URL" + newfilename;

}catch (Exception e) {

e.printStackTrace();

}

return url;

}

ossService.upload：

/**

* 上传文件

*/

public boolean upload(String filepath, InputStream inputstream) {

boolean result = false;

// 初始化配置参数

String OSS_ENDPOINT = "阿里云 上传oss 配置的 ENDPOINT";

String OSS_ACCESSKEYID = "阿里云 上传oss 配置的 CCESSKEYID";

String OSS_ACCESSKEYSECRET = "阿里云 上传oss 配置的 ACCESSKEYSECRET";

String OSS_BUCKET = "阿里云 上传oss 配置的 BUCKET";

OSSClient ossClient = null;

try {

if (filepath != null && !"".equals(filepath.trim())) {

// 创建ClientConfiguration实例，按照您的需要修改默认参数

ClientConfiguration conf = new ClientConfiguration();

// 开启支持CNAME选项

conf.setSupportCname(true);

ossClient = new OSSClient(OSS_ENDPOINT, OSS_ACCESSKEYID, OSS_ACCESSKEYSECRET, conf);

// 上传

ossClient.putObject(OSS_BUCKET, filepath, inputstream);

result = true;

}

} catch (Exception e) {

e.printStackTrace();

throw new RuntimeException("文件上传异常");

} finally {

// 关闭client

ossClient.shutdown();

}

return result;

}

参考资料：https://zhuanlan.zhihu.com/p/158576491

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