SpringBoot项目生成二维码，再生成Excel文件导出，亲测采坑
1.项目环境 maven依赖 pom文件
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-baseartifactId>
<version>${easypoi.version}version>
<exclusions>
<exclusion>
<groupId>com.google.guavagroupId>
<artifactId>guavaartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-webartifactId>
<version>${easypoi.version}version>
dependency>
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-annotationartifactId>
<version>${easypoi.version}version>
dependency>
<dependency>
<groupId>com.google.zxinggroupId>
<artifactId>coreartifactId>
dependency>
<dependency>
<groupId>com.google.zxinggroupId>
<artifactId>javaseartifactId>
dependency>
easypoi版本号：
必要的工具类 QrCodeExportExcelUtil.java
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.usermodel.Workbook;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
/**
* @Author: xyx
* @Description: TODO
* @DateTime: 2023/3/8 9:47
**/
@Slf4j
public class QrCodeExportExcelUtil {
/**
* 导出excel
*
* @param response HttpServletResponse
* @param fileName 文件名字
* @param workbook 通过exportPicture()方法获取
* @author xieyuanxin
*/
public static void writeExcel(HttpServletResponse response, String fileName, Workbook workbook) throws Exception {
// 判断数据
if (workbook == null) {
throw new Exception("错误");
}
// 重置响应对象
response.reset();
try {
OutputStream outputStream = getOutputStream(fileName, response);
BufferedOutputStream bufferedOutPut = new BufferedOutputStream(outputStream);
workbook.write(bufferedOutPut);
bufferedOutPut.flush();
bufferedOutPut.close();
outputStream.close();
} catch (IOException e) {
log.error(e.getMessage());
}
}
/**
* 导出文件时为Writer生成OutputStream
*
* @param fileName 文件名字
* @param response response
* @return 输出流
* @author xyx
*/
private static OutputStream getOutputStream(String fileName, HttpServletResponse response) throws Exception {
try {
fileName = URLEncoder.encode(fileName, "UTF-8");
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setCharacterEncoding("utf8");
response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xls");
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "no-store");
response.addHeader("Cache-Control", "max-age=0");
response.addHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
response.setHeader("Access-Control-Allow-Credentials", "true");
return response.getOutputStream();
} catch (IOException e) {
throw new Exception("导出excel表格失败!");
}
}
/**
* @Author: xyx
* @Description: 生成二维码字节流
* @DateTime: 14:11 2023/3/8
* @Params: [qrCodeUrl]
* @Return byte[]
*/
public static byte[] createQrCodeBytes(String qrCodeUrl){
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix bitMatrix = null;
try {
bitMatrix = qrCodeWriter.encode(qrCodeUrl, BarcodeFormat.QR_CODE, 150, 150);
} catch (WriterException e1) {
e1.printStackTrace();
}
BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
return QrCodeExportExcelUtil.imageToBytes(image);
}
/**
* BufferedImage转byte[]
*
* @param bImage BufferedImage对象
* @return byte[]
*/
public static byte[] imageToBytes(BufferedImage bImage) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
ImageIO.write(bImage, "png", out);
} catch (IOException e) {
log.error(e.getMessage());
}
return out.toByteArray();
}
}
导出实体对象 MchExportExcel .java
import cn.afterturn.easypoi.excel.annotation.Excel;
import cn.afterturn.easypoi.excel.annotation.ExcelTarget;
import lombok.Data;
/**
* 商户信息导出
*
* @author xyx
* @date 2023/3/6 10:07
*/
@Data
@ExcelTarget(value = "MchExportExcelModel")
public class MchExportExcel {
@Excel(name = "合同码", type = 2, width = 20, height = 20, imageType = 2)
private byte[] contractCode;
@Excel(name = "微信认证码", type = 2, width = 20, height = 20, imageType = 2)
private byte[] wxPayAuthCode;
@Excel(name = "支付宝认证码", type = 2, width = 20, height = 20, imageType = 2)
private byte[] aliPayAuthCode;
@Excel(name = "商户号", width = 15)
private String mchNo;
}
核心方法
@GetMapping(value = "/export")
public void export() throws Exception{
IPage<MchApplyment> pages = mchApplymentService.page(getIPage(), new LambdaQueryWrapper<MchApplyment>() );
try {
List<MchApplymentExportExcel> newList = new ArrayList<>();
for (MchApplyment mchApplyment : pages.getRecords()) {
MchApplymentExportExcel exportExcel = new MchApplymentExportExcel();
DgpayApplymentInfo applymentInfo = JSON.parseObject(mchApplyment.getApplyDetailInfo(), DgpayApplymentInfo.class);
BeanUtils.copyProperties(mchApplyment, exportExcel);
// 调起接口获取签约信息
ApplymentSignInfo signInfo = isvmchApplymentService.signInfo(mchApplyment);
// 将返回的url字符串生成二维码
exportExcel.setContractCode(QrCodeExportExcelUtil.createQrCodeBytes(signInfo.getSignUrl()));
// 调起接口获取微信配置信息 这个调用微信接口返回是base64字符串有点不太一样，需要做个解析处理,转出字节流
ApplymentSignInfo wxApplymentSignInfo = isvmchWxConfigService.wxOpenSignInfo(mchApplyment);
byte[] pngs = Base64.getDecoder().decode(wxApplymentSignInfo.getSignUrl());
exportExcel.setWxPayAuthCode(pngs);
// 调起接口获取支付宝配置信息
ApplymentSignInfo alipayApplymentSignInfo = isvmchAlipayConfigService.alipayOpenSignInfo(mchApplyment);
exportExcel.setAliPayAuthCode(QrCodeExportExcelUtil.createQrCodeBytes(alipayApplymentSignInfo.getSignUrl()));
newList.add(exportExcel);
}
// excel输出
QrCodeExportExcelUtil.writeExcel(response, title, ExcelExportUtil.exportExcel(new ExportParams("进件统计", "进件统计"), MchApplymentExportExcel.class, newList));
}catch (Exception e) {
logger.error("导出excel失败", e);
throw new BizException("导出订单失败！");
}
}
效果：
