后端导出excel

 @ApiOperation(value = "导出埋点到excel")
    @GetMapping("getReportMid")
    public void getVideoMid5(HttpServletResponse response,String courseId) throws IOException {
        List<XXTMDModel> list = iCrawingVideoQuestionXXTService.getVideoQuestion1(courseId);

        int allQuestionSize= list.size();

        List<NewExcelModel> listExcelModel = new ArrayList<>();

//        for(XXTMDModel xxtmdModel : list){
//            NewExcelModel newExcelModel = new NewExcelModel();
//            String questionType = xxtmdModel.getQuestionType();
//            String description = xxtmdModel.getDescription();
//            newExcelModel.setQuestionType(questionType);
//            newExcelModel.setDescription(description);
//           for(XXTMDOptions xxtmdOptions : xxtmdModel.getOptionsList()){
//               String name = xxtmdOptions.getName();
//               String descriptionOption = xxtmdOptions.getDescription();
//               newExcelModel.setOptionName(name);
//               newExcelModel.setDescription(descriptionOption);
//               listExcelModel.add(newExcelModel);
//           }
//
//        }
        for(XXTMDModel xxtmdModel : list){
            for(XXTMDOptions xxtmdOptions : xxtmdModel.getOptionsList()){
                NewExcelModel newExcelModel = new NewExcelModel();
                String questionType = xxtmdModel.getQuestionType();
                String description = xxtmdModel.getDescription();
                newExcelModel.setQuestionType(questionType);
                newExcelModel.setDescription(description);
                String name = xxtmdOptions.getName();
                String descriptionOption = xxtmdOptions.getDescription();
                newExcelModel.setOptionName(name);
                newExcelModel.setOptionDescription(descriptionOption);
                listExcelModel.add(newExcelModel);
            }
            System.out.println("这次我想看到的容量                     "+listExcelModel.size());
            System.out.println("这次我想看到的内容                    "+listExcelModel);
        }

        batchExport(allQuestionSize,response,listExcelModel);
    }

List<XXTMDModel> getVideoQuestion1(String courseId) throws IOException;

//获取爬取的list
 @Override
    public List<XXTMDModel> getVideoQuestion1(String courseId) throws IOException {

        List<String> list = getMId(courseId);
        List<XXTModel> list2 = new ArrayList<>();
        List<XXTMDModel> listMD = new ArrayList<>();
        for(String strMid : list){
            XXTVideoQuestionModel videoQuestionModel = new XXTVideoQuestionModel();
            videoQuestionModel.setMid(strMid);
            // 发起http请求获取请求数据
           String videoQuestionBody = HttpUtils.sendHttpGet(videoQuestionModel.getCookie(), chaoXingConfigurationUtils.getVideoQuestion(videoQuestionModel.getMid(), videoQuestionModel.getCpi(), videoQuestionModel.getClassid()));

            //小心覆盖的问题
            list2 = JSON.parseArray(videoQuestionBody, XXTModel.class);
            for(XXTModel xxtModel : list2){
                for(XXTQuestionModel xxtQuestionModel : xxtModel.getDatas()){
                    XXTMDModel xxtmdModel = new XXTMDModel();
                    String questionType = xxtQuestionModel.getQuestionType();
                    String desciription = xxtQuestionModel.getDescription();
                    xxtmdModel.setQuestionType(questionType);
                    xxtmdModel.setDescription(desciription);
                    List<XXTMDOptions> list4 = new ArrayList<>();
                    for (OptionModel optionModel : xxtQuestionModel.getOptions()){
                        String name = optionModel.getName();
                        String description = optionModel.getDescription();
                        XXTMDOptions xxtmdOptions = new XXTMDOptions();
                        xxtmdOptions.setName(name);
                        xxtmdOptions.setDescription(description);
                        list4.add(xxtmdOptions);
                        xxtmdModel.setOptionsList(list4);
                    }
                    listMD.add(xxtmdModel);
                }
            }
        }
        return listMD;
    }

   //导出excel
 public Object batchExport(int allQuestionSize,HttpServletResponse response,List<NewExcelModel> mdList) throws IOException {

        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
        String fileName = URLEncoder.encode("视频埋点问题统计", "UTF-8");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
        //需要合并的列
        int[] mergeColumeIndex = {0,1};
        //从第二行后开始合并
        int mergeRowIndex = 2;
        //设置动态标题
        List<List<String>> headers = this.getHeaders("所有问题数量："+allQuestionSize+"个");

        // 调用合并单元格工具类，此工具类是根据工程名称相同则合并后面数据
        ExcelMergeUtil excelFillCellMergeStrategy = new ExcelMergeUtil(mergeRowIndex,mergeColumeIndex);
        // 这里需要设置不关闭流
        WriteCellStyle headWriteCellStyle = new WriteCellStyle();
        //设置背景颜色
        headWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
        //设置头字体
        WriteFont headWriteFont = new WriteFont();
        headWriteFont.setFontHeightInPoints((short)13);
        headWriteFont.setBold(true);
        headWriteCellStyle.setWriteFont(headWriteFont);
        //设置头居中
        headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
        //内容策略
        WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
        //设置 水平居中
        contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
        // 垂直居中
        contentWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);

        HorizontalCellStyleStrategy horizontalCellStyleStrategy =
                new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);

        EasyExcel.write(response.getOutputStream(), NewExcelModel.class)
                .head(headers)
                .registerWriteHandler(horizontalCellStyleStrategy)
                .registerWriteHandler(excelFillCellMergeStrategy)
                // 导出文件名
                .autoCloseStream(Boolean.TRUE).sheet("sheet")
                .doWrite(mdList);
        return null;
    }

 @ApiOperation(value = "获取所有埋点")
    @GetMapping("getVideoMid")
    public FrontResult getVideoMid(String courseId) throws IOException {
        List<XXTMDModel> list = iCrawingVideoQuestionXXTService.getVideoQuestion1(courseId);
//        iCrawingVideoQuestionXXTService.excludeOrIncludeWrite(list);
        if (list != null) {
            return FrontResult.getSuccessResult(ResultMsgEnum.FIND_SUCCESS.getMsg(), list);
        }
        return FrontResult.getExceptionResult(ResultCodeEnum.FAIL.getCode(), ResultMsgEnum.FIND_FAIL.getMsg());
    }

package com.example.crawlingcoursebackend.model.CrawlingXXT;

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.write.style.ColumnWidth;
import com.alibaba.excel.annotation.write.style.ContentLoopMerge;
import com.alibaba.excel.annotation.write.style.ContentRowHeight;
import com.alibaba.excel.annotation.write.style.HeadRowHeight;
import lombok.Data;
import lombok.EqualsAndHashCode;

import java.util.List;

@Data
@EqualsAndHashCode
@ContentRowHeight(20)
@HeadRowHeight(20)
@ColumnWidth(10)
public class XXTMDModel {

    @ExcelProperty(value = "题型",index = 0)
    private String questionType;

    @ColumnWidth(100)
    @ExcelProperty(value = "题干",index = 1)
    private String description;

    @ExcelProperty(value = "选项",index = 2)
    @ColumnWidth(40)
    private List<XXTMDOptions> optionsList;
}

package com.example.crawlingcoursebackend.model.CrawlingXXT;

import com.alibaba.excel.annotation.write.style.ColumnWidth;
import lombok.Data;

@Data
public class NewExcelModel {

    private String questionType;
    @ColumnWidth(100)
    private String description;

    private String optionName;

    private String optionDescription;

}