Java 批量生成二维码图片，并打包成可直接下载的zip包（spring boot）

最近做的一个项目中，需要提供给web端一个接口：downloadQr。用到了Google的Zxing框架，版本是3.3.1 。项目使用的是springboot框架。

一、API文档

接口名称：/downloadAllQr
接口描述：批量生成二维码图片，并打包成可直接下载的zip包
请求方式：GET
请求参数：String data
响应内容：zip文件流

二、下面直接上代码

• controller层

import com.google.zxing.WriterException;import org.springframework.web.bind.annotation.GetMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;@GetMapping("downloadAllQr")    public void downloadAllQr(HttpServletRequest httpServletRequest, HttpServletResponse      httpServletResponse, @RequestParam("data") String data) throws IOException, WriterException {       biz.downloadAllQr(httpServletRequest, httpServletResponse, data);    }

• biz层 interface

import com.google.zxing.WriterException;import org.springframework.web.bind.annotation.GetMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;void downloadAllQr(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, String data) throws WriterException, IOException;

• biz层 实现

import com.google.common.collect.Lists;import com.google.common.collect.Maps;import com.google.common.collect.Sets;import com.google.gson.Gson;import com.google.zxing.BarcodeFormat;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import javax.imageio.ImageIO;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.awt.*;import java.awt.image.BufferedImage;import java.beans.IntrospectionException;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.stream.Collectors;import java.util.zip.GZIPOutputStream;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;@Override    public void downloadAllQr(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, String data)            throws WriterException, IOException {        httpServletResponse.setContentType("application/zip");            httpServletResponse.setHeader("Content-disposition",                    "attachment; filename=" + new String(PoiUtil.getFileName("二维码列表").getBytes(),                     "ISO-8859-1") + ".zip");            OutputStream outputStream = httpServletResponse.getOutputStream();            ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream);            for (DbDO row : dbDOS) {                BitMatrix bitMatrix = new MultiFormatWriter().encode(data + row.getId(), BarcodeFormat.QR_CODE, Constant.QR_WIDTH, Constant.QR_HEIGHT);                BufferedImage buffImg = MatrixToImageWriter.toBufferedImage(bitMatrix);                ZipEntry entry = new ZipEntry(row.getTitle() + "." + GlobalBizImpl.QR_FILE_TYPE);                zipOutputStream.putNextEntry(entry);                ImageIO.write(buffImg, GlobalBizImpl.QR_FILE_TYPE, zipOutputStream);                zipOutputStream.flush();            }            zipOutputStream.close();            outputStream.flush();            outputStream.close();    }