通过zxing将字符串生成二维码并将二维码传入阿里云OSS存储

目录

一.二维码生成

1.在pom.xml中添加需要的依赖

 2.生成工具类，QPutils

3.在测试类中调用工具类使用方法并传入参数

4.根据生成图片的路径打开文件夹

二.将二维码传入阿里云并获得返回的url

1.开通OSS

2.添加依赖

3.实现代码

4.结果

​5.参考资料        

---

一.二维码生成

1.在pom.xml中添加需要的依赖

      
            com.google.zxing
            core
            3.4.1
        
        
            com.google.zxing
            javase
            3.4.1
        

 2.生成工具类，QPutils

package com.hb.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;

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;

public class QPUtils {
//二维码黑白对应的三原色数据
    private  final int white = 0xFF000000;
    private  final int black = 0xFFFFFFFF;

    public  byte[] create(String string) throws WriterException, IOException {
        final int width = 300;/*若想改变图片的大小，可将width、height设置为create方法的参数并去掉final关键字，然后在调用方法时传入*/
        final int height = 300;
//        final String format = "png";
        HashMap hits = new HashMap();
        hits.put(EncodeHintType.CHARACTER_SET,"utf-8");
        hits.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        hits.put(EncodeHintType.MARGIN,1);
        BarcodeFormat format = BarcodeFormat.QR_CODE;
        BitMatrix bitMatrix = new MultiFormatWriter().encode(string, format, width, height, hits);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        MatrixToImageWriter.writeToStream(bitMatrix,"png",os);
        os.close();    
        return os.toByteArray();
    }
}

3.在测试类中调用工具类使用方法并传入参数

package com.hb;

import com.google.zxing.WriterException;
import com.hb.utils.QPUtils;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

@SpringBootTest
public class ZxingTest {
    @Test
    void  test1() throws IOException, WriterException {
        String path = "D://picture";//文件夹路径
        File file = new File(path);
        //如果文件夹不存在则生成文件夹来保存图片
        if(!file.exists()){
            file.mkdirs();
        }
        QPUtils qpUtils = new QPUtils();
        byte[] create = qpUtils.create("https://www.baidu.com/");
        OutputStream fileOutputStream = new FileOutputStream(path+"//"+"baidu.png");/*生成图片的输出流*/
        fileOutputStream.write(create);
        fileOutputStream.close();
    }
}

4.根据生成图片的路径打开文件夹

        由于我传入的数据时一个https请求扫码之后就可跳转到百度首页，如果是一个普通的字符串，扫码之后就会显示字符串的内容。

 

二.将二维码传入阿里云并获得返回的url

1.开通OSS

        具体方法登录阿里云官网查看，开通之后生成accessKeyId，accessKeySecret

2.添加依赖

        
            com.aliyun.oss
            aliyun-sdk-oss
            3.10.2
        

3.实现代码

package com.example.area.exmaple;

import com.aliyun.oss.OSS;
import com.google.zxing.WriterException;
import com.hb.utils.QPutils;

import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URL;
import java.util.Date;
import java.util.Scanner;

import com.aliyun.oss.OSSClientBuilder;

public class OSSExample{
    public static void main(String[] args) throws IOException, WriterException {
        System.out.println("输入想要生成的字符串:");
        String s = new Scanner(System.in).nextLine();
        //调用QPutil类返回一个
        QPutils erweimaUtil = new QPutils();
        //二维码生成到本地
        byte[] create = erweimaUtil.create(s);
        OutputStream fileOutputStream = new FileOutputStream("F://picture//picture.png");/*生成图片的输出流*/
        fileOutputStream.write(create);
        fileOutputStream.close();
        //二维码上传到阿里云oss
        String objectName = "example/"+s.replace(".","")+".png";//二维码在阿里云的存储路径
        String endpoint = "oss-cn-**.aliyuncs.com";//**表示创建阿里云时所选得区域
        String accessKeyId = "youraccessKeyId";//你的阿里云youraccessKeyId
        String accessKeySecret = "youraccessKeySecret";//你的阿里云accessKeySecret
        String bucketName = "lijinlong930522";//阿里云中创建的bucket名称
        OSS ossClient = new OSSClientBuilder().build( endpoint, accessKeyId, accessKeySecret);//创建OSS实例
        ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(create));
//        MultipartFile文件存储
//        byte[] bytes = file.getBytes();
//        InputStream inputStream = new ByteArrayInputStream(bytes);
//        ossClient.putObject(bucketName,objectName,inputStream);
        //阿里云返回的二维码下载链接，最后一个参数为链接的有效时间，本人所写的参数代表一百天
        URL surl = ossClient.generatePresignedUrl(bucketName, objectName, new Date(new Date().getTime() + 100 * 24 * 3600 * 1000));
        System.out.println(surl);
        ossClient.shutdown();
    }
}

4.结果

下图为返回的二维码下载地址，本地生成的图片根据 newFileOutputStream中的参数去寻找

二维码下载链接：

http://lijinlong930522.oss-cn-chengdu.aliyuncs.com/example/https%3A//wwwbaiducom.png?Expires=1650232062&OSSAccessKeyId=LTAI5tGgui4uSkhzVrNa7VnW&Signature=dx1%2Bha2z2beyLTvor0AdHIvvbAw%3D

5.参考资料        

 https://help.aliyun.com/document_detail/84781.html


 https://help.aliyun.com/document_detail/32016.html