EasyExcel自定义复杂的表头并在同sheet中实现分页
2024-05-28 07:39:20
文章目录
- 前言
- 一、EasyExcel导出
- 1.关键代码
- 2.测试
- 3.导出结果展示
- 总结
前言
提示：以下是本篇文章正文内容，下面案例可供参考
自定义表头导出excel，并在同sheet中进行分页
一、EasyExcel导出
1.关键代码
代码如下（示例）：
EasyExcelUtils
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.write.merge.LoopMergeStrategy;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.WriteTable;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.alibaba.excel.write.metadata.style.WriteFont;
import com.alibaba.excel.write.style.HorizontalCellStyleStrategy;
import com.alibaba.excel.write.style.column.AbstractColumnWidthStyleStrategy;
import com.alibaba.excel.write.style.row.SimpleRowHeightStyleStrategy;
import org.apache.poi.ss.usermodel.*;import javax.servlet.http.HttpServletResponse;
import java.net.URLEncoder;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;/*** @description: easyexcel 实现自定义表头并在同一个 sheet 中分页* easyexcel 引用的是 3.1.1 版本*/
public class EasyExcelUtils {/*** 下载 excel** @param response* @param list 主体表格数据* @throws Exception*/public static void download(HttpServletResponse response, List<?> list) throws Exception {// 总共 8 列int columnTotal = 8;// 首行标题List<List<String>> titleData = new ArrayList<>();List<String> title = Arrays.asList("这是标题");titleData.add(title);// 中间抬头部分List<List<String>> secondData = new ArrayList<>();// 合并前3列, 合并后5列List<String> second1 = Arrays.asList("这是抬头1", "", "", "抬头1的内容");List<String> second2 = Arrays.asList("这是抬头2", "", "", "抬头2的内容");secondData.add(second1);secondData.add(second2);// 末尾合计List<List<String>> totalData = new ArrayList<>();List<String> total = new ArrayList<>();for (int i = 1; i <= columnTotal; i++) {if (i == 1) {total.add("合计");continue;}if (i == columnTotal) {total.add("这是合计总数");continue;}total.add("");}totalData.add(total);excelCreate(response, list, columnTotal, titleData, secondData, totalData);}/*** excel 表格生成** @param response* @param list 主体表格数据* @param columnTotal 总列数* @param titleData 表头数据* @param secondData 第二部分抬头数据* @param totalData 合计数据* @throws Exception*/private static void excelCreate(HttpServletResponse response, List<?> list, int columnTotal, List<List<String>> titleData,List<List<String>> secondData, List<List<String>> totalData) throws Exception {response.setContentType("application/octet-stream");response.setCharacterEncoding("utf-8");String fileName = URLEncoder.encode("Excel文件名称" + DateTimeFormatter.BASIC_ISO_DATE.format(LocalDate.now()), "UTF-8").replaceAll("\\+", "%20");response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");try (ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream()).build()) {WriteSheet sheet = EasyExcel.writerSheet("sheetName").build();// 按每5行数据进行分页int pageNum = (int) Math.ceil(list.size() / 5d);if (pageNum == 0) {pageNum = 1;}for (int i = 1; i <= pageNum; i++) {WriteTable titleTable = titleTableCreate(columnTotal);WriteTable secondTable = secondTableCreate(columnTotal);WriteTable headTable = headTableCreate(i + 1);WriteTable totalTable = totalTableCreate(pageNum + 2);excelWriter.write(titleData, sheet, titleTable);excelWriter.write(secondData, sheet, secondTable);int startIndex = (i -1) * 5;int endIndex = Math.min(startIndex + 5, list.size());excelWriter.write(list.subList(startIndex, endIndex), sheet, headTable);excelWriter.write(totalData, sheet, totalTable);}}}/*** 生成标题表格** @param columnTotal* @return*/private static WriteTable titleTableCreate(int columnTotal) {// 合并单元格LoopMergeStrategy loopMergeStrategy = new LoopMergeStrategy(1, columnTotal, 0);// 样式WriteCellStyle titleStyle = new WriteCellStyle();// 水平居中titleStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);// 垂直居中titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 设置白色背景titleStyle.setFillForegroundColor(IndexedColors.WHITE1.getIndex());// 设置字体格式WriteFont font = new WriteFont();font.setBold(Boolean.TRUE);font.setFontHeightInPoints((short)14);font.setFontName("宋体");titleStyle.setWriteFont(font);HorizontalCellStyleStrategy titleStyleStrategy = new HorizontalCellStyleStrategy(titleStyle, titleStyle);// 生成表格WriteTable titleTable = EasyExcel.writerTable(0).registerWriteHandler(new SimpleRowHeightStyleStrategy((short)25, (short)25)).registerWriteHandler(loopMergeStrategy).registerWriteHandler(titleStyleStrategy).needHead(Boolean.FALSE).build();return titleTable;}/*** 生成抬头表格** @param columnTotal* @return*/private static WriteTable secondTableCreate(int columnTotal) {// 合并单元格LoopMergeStrategy loopMergeStrategy1 = new LoopMergeStrategy(1, 3, 0);LoopMergeStrategy loopMergeStrategy2 = new LoopMergeStrategy(1, columnTotal - 3, 3);// 样式WriteCellStyle secondStyle = new WriteCellStyle();// 水平居中secondStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);// 垂直居中secondStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 设置白色背景secondStyle.setFillForegroundColor(IndexedColors.WHITE1.getIndex());// 设置字体格式WriteFont font = new WriteFont();font.setBold(Boolean.FALSE);font.setFontHeightInPoints((short)12);font.setFontName("宋体");secondStyle.setWriteFont(font);HorizontalCellStyleStrategy secondStyleStrategy = new HorizontalCellStyleStrategy(secondStyle, secondStyle);// 生成表格WriteTable secondTable = EasyExcel.writerTable(1).registerWriteHandler(new SimpleRowHeightStyleStrategy((short)25, (short)25)).registerWriteHandler(loopMergeStrategy1).registerWriteHandler(loopMergeStrategy2).registerWriteHandler(secondStyleStrategy).needHead(Boolean.FALSE).build();return secondTable;}/*** 生成主体数据表格** @param tableNum* @return*/private static WriteTable headTableCreate(int tableNum) {List<List<String>> head = new ArrayList<>();List<String> headList = Arrays.asList("姓名", "性别", "年龄", "身份证号", "地址", "工作单位");List<String> subList = Arrays.asList("名称", "工号", "地址");headList.forEach(title -> {if ("工作单位".equals(title)) {subList.forEach(sub -> head.add(Arrays.asList(title, sub)));return;}head.add(Arrays.asList(title, title));});HorizontalCellStyleStrategy headStyleStrategy = headStyleStrategy();// 生成表格WriteTable titleTable = EasyExcel.writerTable(tableNum).registerWriteHandler(new AbstractColumnWidthStyleStrategy() {// 设置指定列的宽度@Overrideprotected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<WriteCellData<?>> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {Sheet sheet = writeSheetHolder.getSheet();int columnIndex = cell.getColumnIndex();if (columnIndex == 3 || columnIndex == 4 || columnIndex == 7) {sheet.setColumnWidth(columnIndex, 7000);} else {sheet.setColumnWidth(columnIndex, 3600);}}}).registerWriteHandler(new SimpleRowHeightStyleStrategy((short)25, (short)25)).registerWriteHandler(headStyleStrategy).head(head).needHead(Boolean.TRUE).build();return titleTable;}/*** 主体表格样式** @return*/private static HorizontalCellStyleStrategy headStyleStrategy() {// 主体表头样式WriteCellStyle headStyle = new WriteCellStyle();// 水平居中headStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);// 垂直居中headStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 设置灰色背景headStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());// 设置字体格式WriteFont font = new WriteFont();font.setBold(Boolean.FALSE);font.setFontHeightInPoints((short)12);font.setFontName("宋体");headStyle.setWriteFont(font);// 设置边框headStyle.setBorderLeft(BorderStyle.THIN);headStyle.setBorderRight(BorderStyle.THIN);headStyle.setBorderTop(BorderStyle.THIN);headStyle.setBorderBottom(BorderStyle.THIN);// 主题内容样式WriteCellStyle contentStyle = new WriteCellStyle();// 水平居中contentStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);// 垂直居中contentStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 设置灰色背景contentStyle.setFillForegroundColor(IndexedColors.WHITE1.getIndex());// 自动换行contentStyle.setWrapped(true);// 设置字体格式font = new WriteFont();font.setBold(Boolean.FALSE);font.setFontHeightInPoints((short)10);font.setFontName("宋体");contentStyle.setWriteFont(font);// 设置边框contentStyle.setBorderLeft(BorderStyle.THIN);contentStyle.setBorderRight(BorderStyle.THIN);contentStyle.setBorderTop(BorderStyle.THIN);contentStyle.setBorderBottom(BorderStyle.THIN);HorizontalCellStyleStrategy headStyleStrategy = new HorizontalCellStyleStrategy(headStyle, contentStyle);return headStyleStrategy;}/*** 生成合计表格** @param tableNum* @return*/private static WriteTable totalTableCreate(int tableNum) {// 样式WriteCellStyle totalStyle = new WriteCellStyle();// 水平靠左totalStyle.setHorizontalAlignment(HorizontalAlignment.LEFT);// 垂直居中totalStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 设置灰色背景totalStyle.setFillPatternType(FillPatternType.SOLID_FOREGROUND);totalStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());// 自动换行totalStyle.setWrapped(true);// 设置字体格式WriteFont font = new WriteFont();font.setBold(Boolean.FALSE);font.setFontHeightInPoints((short)10);font.setFontName("宋体");totalStyle.setWriteFont(font);HorizontalCellStyleStrategy totalStrategy = new HorizontalCellStyleStrategy(null, totalStyle);// 生成表格WriteTable titleTable = EasyExcel.writerTable(tableNum).registerWriteHandler(new SimpleRowHeightStyleStrategy((short)25, (short)25)).registerWriteHandler(totalStrategy).needHead(Boolean.FALSE).build();return titleTable;}
}UserInfo:
/*** @description: 用户信息*/
public class UserInfo {private String name;private String sex;private Integer age;private String cardNo;private String address;private String companyName;private String workNo;private String companyAddress;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getCardNo() {return cardNo;}public void setCardNo(String cardNo) {this.cardNo = cardNo;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getCompanyName() {return companyName;}public void setCompanyName(String companyName) {this.companyName = companyName;}public String getWorkNo() {return workNo;}public void setWorkNo(String workNo) {this.workNo = workNo;}public String getCompanyAddress() {return companyAddress;}public void setCompanyAddress(String companyAddress) {this.companyAddress = companyAddress;}
}2.测试
代码如下（示例）：
@GetMapping("/export")public void downExcel(HttpServletResponse response){try {List<UserInfo> userInfos = buildUserInfos();EasyExcelUtils.download(response, userInfos);} catch (Exception e) {e.printStackTrace();}}private List<UserInfo> buildUserInfos() {List<UserInfo> userInfos = new ArrayList<>();for (int i = 0; i < 20; i++) {UserInfo userInfo = new UserInfo();userInfo.setName("姓名" + i);userInfo.setSex("男");userInfo.setAge(17 + i);userInfo.setCardNo("身份证号" + i);userInfo.setAddress("住址" + i);userInfo.setCompanyName("公司名称" + i);userInfo.setWorkNo("工号" + i);userInfo.setCompanyAddress("公司地址" + i);userInfos.add(userInfo);}return userInfos;}
3.导出结果展示
总结
因为业务场景的不同，需要不同样式的导出模板，自定义表头的灵活性更高，可以根据这个进行扩展，不同格式按不同 table 划分，然后组装，以满足更多场景下的导出
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