easypoi动态表头导出数据

需求：动态导出某年某月用户和用户评分数据信息，表头(序号、姓名、用户姓名)，数据(所有用户对应的评分以及平均分)；

分析：1、表头除过序号、姓名，用户姓名要动态生成；

2、用户评分信息要和表头中的用户一一对应；

1、maven依赖

<!-- easypoi -->
<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>4.4.0</version>
</dependency>
<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>4.4.0</version>
</dependency>
<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-annotation</artifactId><version>4.4.0</version>
</dependency>

2、数据表结构

2.1用户表

2.2 评分表

2.3 sql

select 
tu.id as userId,//用户id（被评分人id）
tu.real_name as realName, //用户姓名（被评分人）
GROUP_CONCAT(ts.scorer_id  SEPARATOR ',') as scorerId,//该用户对应的所有评分人id,用逗号隔开
GROUP_CONCAT(ts.score SEPARATOR ',') as scoreStr,//该用户的所有评分分数,用逗号隔开
ROUND(avg(ts.score),3) as avgScore//该用户评分平均数
from t_user tu left join t_score ts 
on tu.id  = ts.user_id 
where ts.`year` = '2024' and ts.`month` = '5'
GROUP by userId ,realName
order by  avgScore;

3、代码

1、查询表头所有用户，即可知道表头总列数

2、对应上面sql,查询用户评分数据

3、被评分人分数按照评分人userDOS顺序设置

4、评分人是固定的，但是所有评分人不一定都给(用户)被评分人评分，如果评分人还未评分，分数则为0

5、scoreList 中的数据即是按照表头评分人评的分数有序排列(如果评分人还未评分，分数则为0)

6、excel title

7、excel data

8、规则设置高度

9、表头设置样式

3.1 controller

/*** Excel导出*/@GetMapping("/excel")public Result excelDownload( HttpServletResponse response, HttpServletRequest request,@RequestParam(name = "year",required = false) String year,@RequestParam(name = "month",required = false) String month) throws Exception{scoreService.excelDownload(response,request,year,month);return ResultGenerator.genOkResult();}

3.2实现类

@Overridepublic void excelDownload(HttpServletResponse response, HttpServletRequest request,String year, String month) throws IOException {LocalDate currentDate = LocalDate.now();String currentYear = String.valueOf(currentDate.getYear());String currentMonth = String.valueOf(currentDate.getMonthValue());year = StrUtil.isNotEmpty(year) ? year : currentYear;month = StrUtil.isNotEmpty(month) ? month : currentMonth;//1、查询表头所有用户，即可知道表头总列数QueryWrapper<UserDO> queryWrapper =  new QueryWrapper<UserDO>();queryWrapper.isNotNull("real_name");final List<UserDO> userDOS = userMapper.selectList(queryWrapper);//2、对应上面sql,查询用户评分数据final List<UserIdAndScoreDTO> userIdAndScoreDTOS = userMapper.selectUserScores(year, month);//3、被评分人分数按照评分人userDOS顺序设置for(UserIdAndScoreDTO userIdAndScoreDTO : userIdAndScoreDTOS){List<Double> scoreList = new ArrayList<>();final String[] split = userIdAndScoreDTO.getScorerId().split(",");final String[] split1 = userIdAndScoreDTO.getScoreStr().split(",");for(UserDO userDO : userDOS){//判断某个字符串在数组中如果存在，找到对应下标，如果不存在则为-1int index = findStringIndex(split, userDO.getId());//4、评分人是固定的，但是所有评分人不一定都给(用户)被评分人评分，如果评分人还未评分，分数则为0String a = (index!= -1) ? split1[index] : "0";scoreList.add(Double.valueOf(a));}//5、scoreList 中的数据即是按照表头评分人评的分数有序排列(如果评分人还未评分，分数则为0)userIdAndScoreDTO.setScoreList(scoreList);}//6、excel  titlefinal List<DynamicTablePo> tablePoList = getTalePoList(userDOS);//7、excel datafinal List<Map<String, Object>> excelScoreVOS = dataList(userIdAndScoreDTOS, userDOS);List<ExcelExportEntity> beanList = new ArrayList<ExcelExportEntity>(tablePoList.size());for (DynamicTablePo tablePo : tablePoList){ExcelExportEntity entity = new ExcelExportEntity();entity.setName(tablePo.getFiledShowName());entity.setKey(tablePo.getFiledCode());entity.setOrderNum(tablePo.getOrderNum());beanList.add(entity);}String excelName = "营销部"+ month +"月份各专责互评的得分表";String secondTitle = "规则:从日常工作协同等工作进行考评，从1-5分为9个分值进行打分，" +"如:1-1.5-2-2.5-3-3.5-4-4.5-5，每个人总分除以9作为最终得分。" +"注意:分值出现一样作为废票，该人员打分全部人员均按照委分统计。";ExportParams exportParams = new ExportParams(excelName,secondTitle, "sheet1");//8、规则设置高度exportParams.setSecondTitleHeight((short) 10);//9、表头设置样式exportParams.setStyle(ExcelExportTitleStyle.class);Workbook workbook = ExcelExportUtil.exportExcel(exportParams, beanList , excelScoreVOS);response.setHeader("content-Type","application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(excelName + "导出表", "UTF-8") + ".xls");response.setCharacterEncoding("UTF-8");workbook.write(response.getOutputStream());workbook.close();}/*** 组装数据* @return*/private List<Map<String,Object>> dataList(List<UserIdAndScoreDTO> userIdAndScoreDTOS,List<UserDO> userDOS){List<Map<String,Object>> exportList = new ArrayList<>();int j = 1;for(UserIdAndScoreDTO userIdAndScoreDTO : userIdAndScoreDTOS){Map<String,Object> map = new HashMap<>();map.put("num",j);map.put("realName",userIdAndScoreDTO.getRealName());map.put("avgScore",userIdAndScoreDTO.getAvgScore());final List<Double> scoreList = userIdAndScoreDTO.getScoreList();int i =0;for (UserDO userDO : userDOS) {map.put(userDO.getId(),scoreList.get(i));i++;}exportList.add(map);j++;}return exportList;}/*** 设置动态表头* @return*/private List<DynamicTablePo> getTalePoList(List<UserDO> userDOS) {int i = 3;List<DynamicTablePo> resultList = new ArrayList<>();DynamicTablePo tablePo = new DynamicTablePo();tablePo.setFiledShowName("序号");tablePo.setFiledCode("num");tablePo.setOrderNum(1);tablePo.setDataType(0);DynamicTablePo tablePo1 = new DynamicTablePo();tablePo1.setFiledShowName("姓名");tablePo1.setFiledCode("realName");tablePo1.setOrderNum(2);tablePo1.setDataType(0);resultList.add(tablePo);resultList.add(tablePo1);for (UserDO userDO : userDOS) {DynamicTablePo tablePo2 = new DynamicTablePo();tablePo2.setFiledShowName(userDO.getRealName());tablePo2.setFiledCode(userDO.getId());tablePo2.setOrderNum(i);tablePo2.setDataType(0);resultList.add(tablePo2);i++;}DynamicTablePo tablePo3 = new DynamicTablePo();tablePo3.setFiledShowName("平均分");tablePo3.setFiledCode("avgScore");tablePo3.setOrderNum(i);tablePo3.setDataType(0);resultList.add(tablePo3);return resultList;}/*** 判断某个字符串在数组中如果存在，找到对应下标，如果不存在则为-1* @param array* @param target* @return*/public static int findStringIndex(String[] array, String target) {for (int i = 0; i < array.length; i++) {if (array[i].equals(target)) {return i;}}return -1;}

3.3 实体 filedCode(表头key值和查询出来的数据的实体/map相对应，否则无法填充数据)

package com.langzhifangling.wx.scoringapplet.model.VO;import lombok.Data;import java.io.Serializable;@Data
public class DynamicTablePo implements Serializable {private static final long serialVersionUID = 8991244829305414889L;//表头名字private String filedShowName;//表头key值和查询出来的数据的实体相对应private String filedCode;//表头顺序private Integer orderNum;//字段数据类型private Integer dataType;
}

3.4 表头样式

package com.langzhifangling.wx.scoringapplet.config;import cn.afterturn.easypoi.excel.export.styler.AbstractExcelExportStyler;
import cn.afterturn.easypoi.excel.export.styler.IExcelExportStyler;
import org.apache.poi.ss.usermodel.*;/*** 导出自定义title的工具类** @author changjiang.liu* @date 2022/5/23 16:44*/
public class ExcelExportTitleStyle extends AbstractExcelExportStylerimplements IExcelExportStyler {public ExcelExportTitleStyle(Workbook workbook) {super.createStyles(workbook);}@Overridepublic CellStyle getTitleStyle(short color) {CellStyle titleStyle = workbook.createCellStyle();// 自定义字体Font font = workbook.createFont();font.setColor(IndexedColors.WHITE1.getIndex());font.setBold(true);font.setFontName("宋体");titleStyle.setFont(font);// 自定义背景色titleStyle.setFillForegroundColor(IndexedColors.PALE_BLUE.getIndex());titleStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);titleStyle.setBorderBottom(BorderStyle.THIN);titleStyle.setBorderTop(BorderStyle.THIN);titleStyle.setBorderLeft(BorderStyle.THIN);titleStyle.setBorderRight(BorderStyle.THIN);titleStyle.setAlignment(HorizontalAlignment.CENTER);titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);titleStyle.setWrapText(true);return titleStyle;}@Overridepublic CellStyle stringSeptailStyle(Workbook workbook, boolean isWarp) {CellStyle style = workbook.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setDataFormat(STRING_FORMAT);if (isWarp) {style.setWrapText(true);}return style;}@Overridepublic CellStyle getHeaderStyle(short color) {CellStyle titleStyle = workbook.createCellStyle();Font font = workbook.createFont();font.setFontHeightInPoints((short) 12);titleStyle.setFont(font);titleStyle.setAlignment(HorizontalAlignment.CENTER);titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);return titleStyle;}@Overridepublic CellStyle stringNoneStyle(Workbook workbook, boolean isWarp) {CellStyle style = workbook.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setDataFormat(STRING_FORMAT);if (isWarp) {style.setWrapText(true);}return style;}}

4、结果