前言
日常开发中，Excel的导出、导入可以说是最常见的功能模块之一，一个通用的、健壮的的工具类可以节省大量开发时间，让我们把更多精力放在业务处理上中
之前我们也写了一个Excel的简单导出，甚至可以不依赖poi，还扩展了纯前端导出Excel！详情请戳：《POI导出Excel 》《踹掉后端，前端导出Excel》，遗憾的是这些导出并不支持复杂表头
HExcel，一个简单通用的导入导出Excel工具类
1、支持导出复杂表头（支持表头单元格水平合并、垂直合并，支持表头单元格个性化样式）
2、支持导入读取sheet数据（只需要提供title与key的关系，不需要管列的顺序）
3、支持合并当前列中相同数据行
4、数据行单元格支持设置下列选项
PS：依赖 poi 以及 hutool
<!-- POI --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>5.2.3</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>5.2.3</version> </dependency> <!-- hutool --> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.7.4</version> </dependency>
先睹为快
title 标题 key key width 宽度 align 对齐方式 background-color 背景颜色（POI的IndexedColors） color 字体颜色（POI的IndexedColors） children 子级表头 hide 是否为隐藏列 merge-data 是否合并当前列相同行 drop-down 单元格下拉框值，数组
完整代码
package cn.huanzi.qch.util; import cn.hutool.core.bean.BeanUtil; import cn.hutool.core.date.DatePattern; import cn.hutool.core.date.DateUtil; import cn.hutool.core.util.NumberUtil; import cn.hutool.json.JSONArray; import cn.hutool.json.JSONObject; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.ss.util.CellRangeAddressList; import javax.servlet.ServletoutputStream; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.net.URLEncoder; import java.util.*; /** * HExcel，一个简单通用的导入导出Excel工具类 * 1、支持复杂表头导出（支持表头单元格水平合并、垂直合并，支持表头单元格个性化样式） * 2、支持导入读取sheet数据（需要提供表头数据） * * PS：依赖 poi 以及 hutool * * 详情请戳：https://www.cnblogs.com/huanzi-qch/p/17797355.html */ public class HExcel { /** * 获取一个HExcel实例，并初始化空Workbook对象 */ public static HExcel newInstance(){ HExcel hExcelUtil = new HExcel(); hExcelUtil.hssfWorkbook = new hssfWorkbook(); return hExcelUtil; } /** * 获取一个HExcel实例，并根据excelFile初始化Workbook对象 */ public static HExcel newInstance(File excelFile){ HExcel hExcelUtil = new HExcel(); try { hExcelUtil.hssfWorkbook = new hssfWorkbook(new FileInputStream(excelFile)); } catch (IOException e) { throw new RuntimeException("【HExcel】 根据excelFile初始化Workbook对象异常",e); } return hExcelUtil; } /** * 导入并读取Excel * * @param sheetIndex 需要读取的sheet下标，从0开始 * @param headers 表头 * @return 返回数据集合 */ public <T> ArrayList<T> readSheet(int sheetIndex,JSONArray headers,Class<T> clazz){ //title与key的关系json对象headers = {JSONArray@2046} size = 1 JSONObject headerTitleKey = this.getLastHeader(headers); int firstDaTarow = headerTitleKey.getInt("header-depth"); //最终返回的数据集合 ArrayList<T> list = new ArrayList<>(); //获取sheet hssfSheet sheet = this.hssfWorkbook.getSheetAt(sheetIndex); //获取title与col的对应关系 HashMap<Integer, String> headerMap = new HashMap<>(); int lastCellNum = sheet.getRow(0).getLastCellNum(); for (int i = 0; i < lastCellNum; i++) { for (int j = firstDaTarow-1; j >=0 ; j--) { hssfCell cell = sheet.getRow(j).getCell(i); if(cell != null && !"".equals(cell.getStringCellValue())){ String title = cell.getStringCellValue(); headerMap.put(i,title); break; } } } //获取数据 for (int i = firstDaTarow; i <= sheet.getLastRowNum(); i++) { hssfRow row = sheet.getRow(i); JSONObject object = new JSONObject(); for (int j = 0; j < lastCellNum; j++) { String title = headerMap.get(j); String key = headerTitleKey.getStr(title); if(key != null && !"".equals(key)){ hssfCell cell = row.getCell(j); Object value; if(cell.getCellType().toString().equals("NUMERIC")){//数字类型 value = cell.getNumericCellValue(); }else{//字符串类型 value = cell.getStringCellValue(); } object.set(key,value); } } list.add(object.toBean(clazz)); } return list; } /** * 构造一个sheet，以及生成复杂表头、表数据 * * @param sheetName sheet名称 * @param headers 复杂表头json数组对象 * @param dataLists 表数据集合 * @return HExcel */ public <T> HExcel buildSheet(String sheetName, JSONArray headers, List<T> dataLists) { //建立新的sheet对象 hssfSheet sheet = this.hssfWorkbook.getSheet(sheetName); if(sheet == null){ sheet = this.hssfWorkbook.createSheet(sheetName);//设置表单名 } //生成复杂表头 int row = 0;//当前行 int col = 0;//当前列 HashMap<String, Object> hashMap = createHeader(sheet,row,col,headers); ArrayList<JSONObject> headerList = (ArrayList<JSONObject>) hashMap.get("headerList"); row = (int) hashMap.get("maxRow"); //取出水平合并区域数据 List<CellRangeAddress> cellRangeAddressList = sheet.getMergedRegions(); //垂直合并，单元格为空，且不属于水平合并区域 //这里row-1是因为，生成所有表头结束后，maxRow比最大行+1， for (int i = 0; i < headerList.size(); i++) { for (int j = 0; j <= row-1; j++) { boolean flag = true; //单元格不为空 hssfCell cell = sheet.getRow(j).getCell(i); if(cell != null){ continue; } //检查合并区域 for (CellRangeAddress cellAddresses : cellRangeAddressList) { int OldFirstRow = cellAddresses.getFirstRow(); int OldLastRow = cellAddresses.getLastRow(); int OldFirstCol = cellAddresses.getFirstColumn(); int OldLastCol = cellAddresses.getLastColumn(); //与合并区域重叠 if ((OldFirstRow >= j && OldLastRow <= j) && (OldFirstCol >= i && OldLastCol <= i)) { flag = false; break; } } //满足条件，将上一个单元格与最后一个单元格合并 if(flag){ mergedCell(sheet,j-1,row-1,i,i); break; } } } //开始填充数据 HashMap<String, Object> mergeDataTempMap = new HashMap<>(); hssfCellStyle dataStyle = createDataStyle(sheet); for (int listIndex = 0; listIndex < dataLists.size(); listIndex++) { Object object = dataLists.get(listIndex); Map<String, Object> map = BeanUtil.beanToMap(object); //创建内容行 hssfRow datahssfRow = sheet.createRow(row); //隐藏行 //datahssfRow.setZeroHeight(true); for (int i = 0; i < headerList.size(); i++) { JSONObject header = headerList.get(i); String key = header.getStr("key"); Object val = map.get(key); //当前列是否设置为下拉框，用于限定用户输入内容 List<String> dropDownDataList = header.getBeanList("drop-down", String.class); if(dropDownDataList != null && dropDownDataList.size() > 0){ DataValidationHelper dataValidationHelper = sheet.getDataValidationHelper(); DataValidationConstraint dataValidationConstraint = dataValidationHelper.createExplicitListConstraint(dropDownDataList.toArray(new String[] {})); DataValidation dataValidation = dataValidationHelper.createValidation(dataValidationConstraint, new CellRangeAddressList(row, row, i, i)); sheet.addValidationData(dataValidation); //数据与下拉框内容不匹配时，置空 if(!dropDownDataList.contains(String.valueOf(val))){ val = null; } } //如果是隐藏列，取消自动换行 Object hide = header.get("hide"); if(hide != null && (boolean)hide){ dataStyle.setWrapText(false); } //创建单元格内容 createCell(datahssfRow, i, dataStyle, val == null ? "" : val); //当前列是否合并相同数据行 Object mergeData = header.get("merge-data"); if(mergeData != null && (boolean)mergeData){ //保存临时数据 if(mergeDataTempMap.get("val_"+i) == null){ mergeDataTempMap.put("val_"+i,String.valueOf(val)); mergeDataTempMap.put("row_"+i,row); } //如果当前行数据与临时数据不一致，合并上方相同行 if(!String.valueOf(val).equals(String.valueOf(mergeDataTempMap.get("val_"+i)))){ mergedCell(sheet,(int)mergeDataTempMap.get("row_"+i),row - 1,i,i); mergeDataTempMap.put("val_"+i,val); mergeDataTempMap.put("row_"+i,row); } //如果最后一行数据与临时数据一致，合并相同行 if(listIndex >= dataLists.size()-1 && String.valueOf(val).equals(String.valueOf(mergeDataTempMap.get("val_"+i)))){ mergedCell(sheet,(int)mergeDataTempMap.get("row_"+i),row,i,i); } } } row++; } return this; } /** * 保存成File文件 * * @param path 完整文件路径+文件名 */ public void toFile(String path) { //try-catch语法糖 try (FileOutputStream out = new FileOutputStream(path);){ this.hssfWorkbook.write(out); }catch (IOException e){ throw new RuntimeException("【HExcel】 Workbook对象文件流写入File异常",e); } } /** * 保存到HttpServletResponse * * @param fileName 文件名 * @param response HttpServletResponse对象 */ public void toHttpServletResponse(String fileName, HttpServletResponse response) { //try-catch语法糖 try (ServletoutputStream outputStream = response.getoutputStream();){ response.setHeader("Accept-Ranges", "bytes"); response.setHeader("Content-disposition", "attachment; filename=\"" + URLEncoder.encode(fileName, "UTF-8") + "\""); response.setContentType("application/octet-stream"); this.hssfWorkbook.write(outputStream); }catch (Exception e){ throw new RuntimeException("【HExcel】 Workbook对象文件流写入Response异常",e); } } /** * 关闭Workbook */ public void close(){ try{ //关闭Workbook this.hssfWorkbook.close(); } catch (Exception e) { throw new RuntimeException("【HExcel】 关闭Workbook异常",e); } } /* 已下设置私有，对外隐藏实现细节 */ /** * Workbook对象 */ private hssfWorkbook hssfWorkbook; /** * 构造表头 * * @param sheet sheet * @param row 当前操作行 * @param col 当前操作列 * @param headers 表头数据 * @return 返回一个map对象，供上级表头获取最新当前操作行、列、key集合 */ private HashMap<String,Object> createHeader(hssfSheet sheet, int row, int col, JSONArray headers){ //最终返回对象 HashMap<String, Object> hashMap = new HashMap<>(); //key集合 ArrayList<JSONObject> headerList = new ArrayList<>(); hssfWorkbook wb = sheet.getWorkbook(); hssfRow headerhssfRow = sheet.getRow(row); if(headerhssfRow == null){ headerhssfRow = sheet.createRow(row); } for (Object object : headers) { JSONObject header = (JSONObject) object; String title = (String) header.get("title"); String key = (String) header.get("key"); Object width = header.get("width"); Object hide = header.get("hide"); Object align = header.get("align"); Object backgroundColor = header.get("background-color"); Object color = header.get("color"); Object children = header.get("children"); //单元格样式 hssfCellStyle headerStyle = createHeaderStyle(sheet); //自定义单元格背景色 if(backgroundColor != null){ headerStyle.setFillForegroundColor(Short.parseShort(backgroundColor+"")); } //自定义单元格字体颜色 if(color != null){ headerStyle.getFont(wb).setColor(Short.parseShort(color+"")); } //默认单元格宽度，20 sheet.setColumnWidth(col, 20 * 256); if(width != null){ //自定义单元格宽度 sheet.setColumnWidth(col, (int) width * 256); } //隐藏列，设置宽度0 if(hide != null && (boolean)hide){ //sheet.setColumnWidth(col, 0); sheet.setColumnHidden(col,true); } //默认水平对齐方式（水平居中） if(align != null){ //自定义水平对齐方式 HorizontalAlignment alignment; switch (String.valueOf(align).toupperCase()){ case "LEFT": alignment = HorizontalAlignment.LEFT; break; case "RIGHT": alignment = HorizontalAlignment.RIGHT; break; default: alignment = HorizontalAlignment.CENTER; break; } headerStyle.setAlignment(alignment); } //System.out.println(title + " " + key + " " + row + " " + col); //生成单元格同时设置内容 createCell(headerhssfRow, col, headerStyle, title); //无子级表头 if(children == null){ //保留顺序，方便后面设置数据 headerList.add(header); //当前列+1 coL++; } //有子级表头 else{ //递归生成子级表头前，保存父级表头col，用于水平合并 int firstCol = col; //递归调用 HashMap<String, Object> hashMap1 = createHeader(sheet, row + 1, col, (JSONArray) children); //获取最新col、key集合 col = (int) hashMap1.get("col"); hashMap.put("maxRow",hashMap1.get("maxRow")); headerList.addAll((ArrayList<JSONObject>) hashMap1.get("headerList")); //水平合并，这里col-1是因为，生成子级表头结束后，col比最后一个下级表头+1， if(!(firstCol == col-1)){ mergedCell(sheet,row,row,firstCol,col-1); } } } //将数据设置到对象中，返回上一层 hashMap.put("maxRow",(hashMap.get("maxRow") != null ? Integer.parseInt(hashMap.get("maxRow")+"") : 0) + 1);//最大行 hashMap.put("row",row);//当前操作行 hashMap.put("col",col);//当前操作列 hashMap.put("headerList",headerList);//key集合 return hashMap; } /** * 创建一个单元格 * * @param hssfRow 当前行对象 * @param col 当前列 * @param cellStyle 单元格样式对象 * @param value 单元格内容 */ private void createCell(hssfRow hssfRow, int col, hssfCellStyle cellStyle, Object value) { hssfCell cell = hssfRow.createCell(col); // 创建单元格 cell.setCellStyle(cellStyle); // 设置单元格样式 // 设置值 String valueStr = String.valueOf(value); if (NumberUtil.isNumber(valueStr)){//数字 cell.setCellValue(NumberUtil.parseDouble(NumberUtil.toStr(NumberUtil.parseNumber(valueStr)))); } else if (value instanceof Date){//日期 cell.setCellValue(DateUtil.format((Date) value, DatePattern.norM_DATETIME_FORMAT)); }else{//字符串 cell.setCellValue(valueStr); } } /** * 构造表头、数据样式 * * @param sheet sheet * @return 返回一个单元格样式对象 */ private hssfCellStyle createHeaderStyle(hssfSheet sheet){ hssfWorkbook wb = sheet.getWorkbook(); //表头的样式 hssfCellStyle headerStyle = wb.createCellStyle(); headerStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中 headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中 //列名的字体 hssfFont dataFont = wb.createFont(); dataFont.setFontHeightInPoints((short) 12); dataFont.setFontName("新宋体"); headerStyle.setFont(dataFont);// 把字体 应用到当前样式 headerStyle.setWrapText(true);//自动换行 //填充样式，前景色、天空蓝 headerStyle.setFillPattern(FillPatternType.soLID_FOREGROUND); headerStyle.setFillForegroundColor(IndexedColors.PALE_BLUE.getIndex()); // 设置边框 headerStyle.setBorderBottom(BorderStyle.THIN); headerStyle.setBorderLeft(BorderStyle.THIN); headerStyle.setBorderRight(BorderStyle.THIN); headerStyle.setBorderTop(BorderStyle.THIN); return headerStyle; } private hssfCellStyle createDataStyle(hssfSheet sheet){ hssfWorkbook wb = sheet.getWorkbook(); //内容的样式 hssfCellStyle dataStyle = wb.createCellStyle(); dataStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中 dataStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中 //内容的字体 hssfFont font3 = wb.createFont(); font3.setFontHeightInPoints((short) 12); font3.setFontName("新宋体"); dataStyle.setFont(font3);// 把字体 应用到当前样式 dataStyle.setWrapText(true);//自动换行 //默认无填充 dataStyle.setFillPattern(FillPatternType.NO_FILL); // 设置边框 dataStyle.setBorderBottom(BorderStyle.THIN); dataStyle.setBorderLeft(BorderStyle.THIN); dataStyle.setBorderRight(BorderStyle.THIN); dataStyle.setBorderTop(BorderStyle.THIN); return dataStyle; } /** * 合并单元格 * * @param sheet sheet * @param firstRow 起始行 * @param lastRow 结束行 * @param firstCol 起始列 * @param lastCol 结束列 */ private void mergedCell(hssfSheet sheet,int firstRow, int lastRow, int firstCol, int lastCol){ //一个单元格无需合并，例如：[0,0,0,0] if(firstRow == lastRow && firstCol == lastCol){ return; } //先取出合并前的单元格样式 hssfCellStyle cellStyle = sheet.getRow(firstRow).getCell(firstCol).getCellStyle(); //合并 sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol)); //解决合并后的边框等样式问题 int first; int end; //垂直合并 if(firstCol == lastCol){ first = firstRow; end = lastRow+1; for (int i = first; i < end; i++) { hssfRow row = sheet.getRow(i); if(row == null){ row = sheet.createRow(i); } hssfCell cell = row.getCell(firstCol); if(cell == null){ cell = row.createCell(firstCol); } cell.setCellStyle(cellStyle); } } //水平合并 else{ first = firstCol; end = lastCol+1; for (int i = first; i < end; i++) { hssfRow row = sheet.getRow(firstRow); if(row == null){ row = sheet.createRow(firstRow); } hssfCell cell = row.getCell(i); if(cell == null){ cell = row.createCell(i); } cell.setCellStyle(cellStyle); } } } /** * 递归获取最末端表头、以及深度 * @param headers 表头 * @return 末端表头，以及额外设置多一个表头深度属性 */ private JSONObject getLastHeader(JSONArray headers){ return this.getLastHeader(headers,1); } private JSONObject getLastHeader(JSONArray headers,int currentRow){ JSONObject headerTitleKey = new JSONObject(); for (Object o : headers) { JSONObject header = (JSONObject) o; String title = (String) header.get("title"); String key = (String) header.get("key"); Object children = header.get("children"); if(children != null){ int lastRow = currentRow; headerTitleKey.putAll(this.getLastHeader((JSONArray)children,++currentRow)); currentRow = lastRow; } if (key == null) { continue; } headerTitleKey.set(title,key); } //额外设置表头深度属性 headerTitleKey.set("header-depth", Math.max(currentRow,headerTitleKey.getInt("header-depth") != null ? headerTitleKey.getInt("header-depth") : currentRow)); return headerTitleKey; } }
完整main测试
public static void main(String[] args) { //获取HExcel实例 HExcel hExcel1 = HExcel.newInstance(); //数据，一般是查数据库，经过数据处理生成 List<Student> dataList = new ArrayList<>(); Student data1 = new Student(); data1.setUserId("asdfasdffadfasdfasdfsdfasdfasdfadfasdfasdf"); data1.setUserName("张三"); data1.setClazz("重点班"); data1.setSex("男"); data1.setAge(20); data1.setDate(new Date()); data1.setYuWen(90.500); data1.setYingYu(0.0); data1.setShuXue(85.123); data1.setWuLi(80.000); data1.setTotal(255.0); data1.setLevel("A"); dataList.add(data1); Student data2 = new Student(); data2.setUserId("222"); data2.setUserName("李四"); data2.setClazz("重点班"); data2.setSex("女"); data2.setAge(18); data2.setDate(new Date()); data2.setYuWen(81.0); data2.setYingYu(0.0); data2.setShuXue(90.0); data2.setWuLi(70.0); data2.setTotal(241.0); dataList.add(data2); Student data3 = new Student(); data3.setUserId("333"); data3.setUserName("王五"); data3.setClazz("普通班"); data3.setSex("男"); data3.setAge(20); data3.setDate(new Date()); data3.setYuWen(90.500); data3.setYingYu(0.0); data3.setShuXue(85.123); data3.setWuLi(80.000); data3.setTotal(255.0); data3.setLevel("A"); dataList.add(data3); Student data4 = new Student(); data4.setUserId("444"); data4.setUserName("刘六"); data4.setClazz("普通班"); data4.setSex("男"); data4.setAge(20); data4.setDate(new Date()); data4.setYuWen(90.500); data4.setYingYu(0.0); data4.setShuXue(85.123); data4.setWuLi(80.000); data4.setTotal(255.0); data4.setLevel("A"); dataList.add(data4); Student data5 = new Student(); data5.setUserId("555"); data5.setUserName("周七"); data5.setClazz("尖子班"); data5.setSex("男"); data5.setAge(20); data5.setDate(new Date()); data5.setYuWen(90.500); data5.setYingYu(0.0); data5.setShuXue(85.123); data5.setWuLi(80.000); data5.setTotal(255.0); data5.setLevel("A"); dataList.add(data5); //如果是固定表头数据，可以在项目资源文件夹下面新建个json文件夹，用来保存表头json数据，方便读、写 //JSONArray header = JSONUtil.parseArray(ResourceUtil.readUtf8Str("json/header.json")); //如果是动态表头数据，直接把json字符串写在代码里，方便动态生成表头数据 //表头 String sheetName = "学生成绩单"; JSONArray headers = JSONUtil.parseArray("" + "[\n" + " {\n" + " \"title\":\""+sheetName+"\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"日期："+DateUtil.today()+"\",\n" + " \"align\":\"right\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"隐藏列，用户id\",\n" + " \"key\":\"userId\",\n" + " \"hide\":true,\n" + " },\n" + " {\n" + " \"title\":\"班级\",\n" + " \"key\":\"clazz\",\n" + " \"merge-data\":true,\n" + " },\n" + " {\n" + " \"title\":\"姓名\",\n" + " \"key\":\"userName\",\n" + " },\n" + " {\n" + " \"title\":\"入学时间\",\n" + " \"key\":\"date\",\n" + " \"width\":30,\n" + " },\n" + " {\n" + " \"title\":\"语文\",\n" + " \"key\":\"yuWen\",\n" + " },\n" + " {\n" + " \"title\":\"数学\",\n" + " \"key\":\"shuXue\",\n" + " },\n" + " {\n" + " \"title\":\"总分\",\n" + " \"key\":\"total\",\n" + " \"background-color\":17,\n" + " \"color\":10,\n" + " \"width\":30,\n" + " \"merge-data\":true,\n" + " },\n" + " {\n" + " \"title\":\"考试成绩等级\",\n" + " \"key\":\"level\",\n" + " \"width\":10,\n" + " \"background-color\":25,\n" + " \"color\":5,\n" + " \"drop-down\":[\n" + " \"A\",\n" + " \"B\",\n" + " \"C\",\n" + " \"D\",\n" + " ],\n" + " },\n" + " ]\n" + " },\n" + " ]\n" + " },\n" + "]" + ""); //生成sheet hExcel1.buildSheet(sheetName, headers, dataList); //表头 JSONArray headers2 = JSONUtil.parseArray("" + "[\n" + " {\n" + " \"title\":\"姓名\",\n" + " \"key\":\"userName\",\n" + " },\n" + " {\n" + " \"title\":\"学科成绩\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"语文\",\n" + " \"key\":\"yuWen\",\n" + " },\n" + " {\n" + " \"title\":\"数学\",\n" + " \"key\":\"shuXue\",\n" + " },\n" + " ]\n" + " },\n" + " {\n" + " \"title\":\"总分\",\n" + " \"key\":\"total\",\n" + " \"align\":\"right\",\n" + " \"background-color\":17,\n" + " \"color\":10,\n" + " \"width\":30\n," + " },\n" + "]" + ""); //生成sheet hExcel1.buildSheet("学生成绩单2", headers2, dataList); //表头 JSONArray headers3 = JSONUtil.parseArray("" + "[\n" + " {\n" + " \"title\":\"姓名\",\n" + " \"key\":\"userName\"\n" + " },\n" + " {\n" + " \"title\":\"性别\",\n" + " \"key\":\"sex\"\n" + " },\n" + " {\n" + " \"title\":\"年龄\",\n" + " \"key\":\"age\"\n" + " },\n" + " {\n" + " \"title\":\"学科成绩\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"语言类\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"语文\",\n" + " \"key\":\"yuWen\",\n" + " \"background-color\":7,\n" + " \"color\":5,\n" + " },\n" + " ]\n" + " },\n" + " {\n" + " \"title\":\"科学类\",\n" + " \"background-color\":10,\n" + " \"children\":[\n" + " {\n" + " \"title\":\"数学\",\n" + " \"key\":\"shuXue\"\n" + " },\n" + " {\n" + " \"title\":\"物理\",\n" + " \"key\":\"wuLi\"\n" + " }\n" + " ]\n" + " },\n" + " ]\n" + " },\n" + " {\n" + " \"title\":\"总分\",\n" + " \"key\":\"total\",\n" + " \"align\":\"right\",\n" + " \"background-color\":17,\n" + " \"color\":10,\n" + " \"width\":30\n," + " },\n" + "]"+ ""); //生成sheet hExcel1.buildSheet("学生成绩单3", headers3, dataList); //表头 JSONArray headers4 = JSONUtil.parseArray("" + "[\n" + " {\n" + " \"title\":\"姓名\",\n" + " \"key\":\"userName\"\n" + " },\n" + " {\n" + " \"title\":\"性别\",\n" + " \"key\":\"sex\"\n" + " },\n" + " {\n" + " \"title\":\"年龄\",\n" + " \"key\":\"age\"\n" + " },\n" + " {\n" + " \"title\":\"学科成绩\",\n" + " \"children\":[\n" + " {\n" + " \"title\":\"语文\",\n" + " \"key\":\"yuWen\",\n" + " },\n" + " {\n" + " \"title\":\"科学类\",\n" + " \"background-color\":10,\n" + " \"children\":[\n" + " {\n" + " \"title\":\"数学\",\n" + " \"key\":\"shuXue\"\n" + " },\n" + " {\n" + " \"title\":\"物理\",\n" + " \"key\":\"wuLi\"\n" + " }\n" + " ]\n" + " },\n" + " {\n" + " \"title\":\"英语\",\n" + " \"key\":\"yingYu\",\n" + " },\n" + " ]\n" + " },\n" + " {\n" + " \"title\":\"总分\",\n" + " \"key\":\"total\",\n" + " \"align\":\"right\",\n" + " \"background-color\":17,\n" + " \"color\":10,\n" + " \"width\":30\n" + " \n" + " }\n" + "]"+ ""); //生成sheet hExcel1.buildSheet("学生成绩单4", headers4, dataList); //保存成File文件 hExcel1.toFile("C:\\Users\\19914811870\\Desktop\\学生成绩单复杂表头导出测试.xls"); System.out.println("导出完成！\n"); //关闭对象 hExcel1.close(); //导入 //根据Excel文件，获取HExcel实例 HExcel hExcel2 = HExcel.newInstance(new File("C:\\Users\\19914811870\\Desktop\\学生成绩单复杂表头导出测试.xls")); //根据表头，读取指定位置的sheet数据，打印sheetList数据 System.out.println("导入读取完成！"); for (Student map : hExcel2.readSheet(0, headers, Student.class)) { System.out.println(map.toString()); } System.out.println("导入读取完成！"); for (Student map : hExcel2.readSheet(1, headers2, Student.class)) { System.out.println(map.toString()); } System.out.println("导入读取完成！"); for (Student map : hExcel2.readSheet(2, headers3, Student.class)) { System.out.println(map.toString()); } System.out.println("导入读取完成！"); for (Student map : hExcel2.readSheet(3, headers4, Student.class)) { System.out.println(map.toString()); } //关闭对象 hExcel2.close(); } /** * main测试学生类 */ static class Student { private String userId; //id private String userName; //姓名 private String clazz; //班级 private String sex; //性别 private Integer age; //年龄 private Date date; //入学时间 private Double yuWen; //语文成绩 private Double yingYu; //英语成绩 private Double shuXue; //数学成绩 private Double wuLi; //物理成绩 private Double total; //总分 private String level; //等级 public Student() { } public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getClazz() { return clazz; } public void setClazz(String clazz) { this.clazz = clazz; } 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 Date getDate() { return date; } public void setDate(Date date) { this.date = date; } public Double getYuWen() { return yuWen; } public void setYuWen(Double yuWen) { this.yuWen = yuWen; } public Double getYingYu() { return yingYu; } public void setYingYu(Double yingYu) { this.yingYu = yingYu; } public Double getShuXue() { return shuXue; } public void setShuXue(Double shuXue) { this.shuXue = shuXue; } public Double getWuLi() { return wuLi; } public void setWuLi(Double wuLi) { this.wuLi = wuLi; } public Double getTotal() { return total; } public void setTotal(Double total) { this.total = total; } public String getLevel() { return level; } public void setLevel(String level) { this.level = level; } @Override public String toString() { return "Student{" + "userId='" + userId + '\'' + ", userName='" + userName + '\'' + ", clazz='" + clazz + '\'' + ", sex='" + sex + '\'' + ", age=" + age + ", date=" + date + ", yuWen=" + yuWen + ", yingYu=" + yingYu + ", shuXue=" + shuXue + ", wuLi=" + wuLi + ", total=" + total + ", level='" + level + '\'' + '}'; } }
后记
一个简单通用的导入导出Excel工具类暂时先记录到这，后续再进行补充
补充
2024-09-14更新
导出新增同一列中，合并相同数据行；
2024-06-15更新
原文地址：https://www.cnblogs.com/huanzi-qch/p/17797355.html
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