Excel 动态拼接表头实现导出

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public class Column {//单元格内容private String content;//字段名称，用户导出表格时反射调用private String fieldName;//这个单元格的集合private List<Column> listTpamscolumn = new ArrayList<Column>();int totalRow;int totalCol;int row;//excel第几行int col;//excel第几列int rLen; //excel 跨多少行int cLen;//excel跨多少列private boolean HasChilren;//是否有子节点private int tree_step;//树的级别 从0开始private String id;private String pid;public Column() {};public Column(String content, String fieldName) {this.content = content;this.fieldName = fieldName;}public Column(String fieldName, String content, int tree_step) {this.tree_step = tree_step;this.fieldName = fieldName;this.content = content;}public int getTotalRow() {return totalRow;}public void setTotalRow(int totalRow) {this.totalRow = totalRow;}public int getTotalCol() {return totalCol;}public void setTotalCol(int totalCol) {this.totalCol = totalCol;}public String getPid() {return pid;}public void setPid(String pid) {this.pid = pid;}public String getId() {return id;}public void setId(String id) {this.id = id;}public boolean isHasChilren() {return HasChilren;}public void setHasChilren(boolean hasChilren) {HasChilren = hasChilren;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public String getFieldName() {return fieldName;}public void setFieldName(String fieldName) {this.fieldName = fieldName;}public List<Column> getListTpamscolumn() {return listTpamscolumn;}public void setListTpamscolumn(List<Column> listTpamscolumn) {this.listTpamscolumn = listTpamscolumn;}public int getTree_step() {return tree_step;}public void setTree_step(int tree_step) {this.tree_step = tree_step;}public int getRow() {return row;}public void setRow(int row) {this.row = row;}public int getCol() {return col;}public void setCol(int col) {this.col = col;}public int getrLen() {return rLen;}public void setrLen(int rLen) {this.rLen = rLen;}public int getcLen() {return cLen;}public void setcLen(int cLen) {this.cLen = cLen;}
}


/*** excel处理工具* 概念-> 表头数据:报表的表头* 行内数据:表头以下的数据* 功能:动态生成单级，多级Excel表头* 备注：tree型结构数据的root节点的id必须为零（0）*/
public class ExcelTool<T> {private HSSFWorkbook workbook;//excel 对象private String title; //表格标题private int colWidth = 20; //单元格宽度private int rowHeight = 20;//单元格行高度private HSSFCellStyle styleHead; //表头样式private HSSFCellStyle styleBody; //主体样式private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //日期格式化,默认yyyy-MM-dd HH:mm:ss/*** 无参数 初始化 对象*/public ExcelTool() {this.title = "sheet1";this.workbook = new HSSFWorkbook();init(0);}/*** 有参数 初始化 对象** @param title* @param colWidth* @param rowHeight* @param dateFormat*/public ExcelTool(String title, int colWidth, int rowHeight, String dateFormat) {this.colWidth = colWidth;this.rowHeight = rowHeight;this.title = title;this.workbook = new HSSFWorkbook();this.sdf = new SimpleDateFormat(dateFormat);init(0);}public ExcelTool(String title, int colWidth, int rowHeight) {this.colWidth = colWidth;this.rowHeight = rowHeight;this.title = title;this.workbook = new HSSFWorkbook();init(0);}public ExcelTool(String title, int colWidth, int rowHeight, int flag) {this.colWidth = colWidth;this.rowHeight = rowHeight;this.title = title;this.workbook = new HSSFWorkbook();init(flag);}public ExcelTool(String title) {this.title = title;this.workbook = new HSSFWorkbook();init(0);}/*** ExcelTool 属性 get、set 方法 开始*/public int getColWidth() {return colWidth;}public void setColWidth(int colWidth) {this.colWidth = colWidth;}public int getRowHeight() {return rowHeight;}public void setRowHeight(int rowHeight) {this.rowHeight = rowHeight;}public HSSFWorkbook getWorkbook() {return this.workbook;}public void setWorkbook(HSSFWorkbook workbook) {this.workbook = workbook;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public HSSFCellStyle getStyleHead() {return styleHead;}public void setStyleHead(HSSFCellStyle styleHead) {this.styleHead = styleHead;}public HSSFCellStyle getStyleBody() {return styleBody;}public void setStyleBody(HSSFCellStyle styleBody) {this.styleBody = styleBody;}/*** ExcelTool 属性 get、set 方法 结束*///内部统一调用的样式初始化private void init(int styleFlag) {this.styleHead = this.workbook.createCellStyle();this.styleHead.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中this.styleHead.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中this.styleHead.setRightBorderColor(HSSFColor.BLACK.index);this.styleHead.setBottomBorderColor(HSSFColor.BLACK.index);switch (styleFlag) {case 1:this.styleBody = this.workbook.createCellStyle();this.styleBody.setAlignment(HSSFCellStyle.ALIGN_LEFT);// 左右居中ALIGN_CENTERthis.styleBody.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中this.styleBody.setRightBorderColor(HSSFColor.BLACK.index);this.styleBody.setBottomBorderColor(HSSFColor.BLACK.index);this.styleBody.setBorderRight((short) 1);// 边框的大小this.styleBody.setBorderBottom((short) 1);// 边框的大小break;default:this.styleBody = this.workbook.createCellStyle();this.styleBody.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中ALIGN_CENTERthis.styleBody.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中this.styleBody.setRightBorderColor(HSSFColor.BLACK.index);this.styleBody.setBottomBorderColor(HSSFColor.BLACK.index);this.styleBody.setBorderRight((short) 1);// 边框的大小this.styleBody.setBorderBottom((short) 1);// 边框的大小break;}}/*** 导出表格 无返回** @param listParamColumn 表头数据* @param dataList        行内数据* @param FilePath        保存路径* @param flag* @param rowFlag* @throws Exception*/public void exportExcel(List<Column> listParamColumn, List<T> dataList, String FilePath, boolean flag, boolean rowFlag) throws Exception {splitDataToSheets(dataList, listParamColumn, flag, rowFlag);save(this.workbook, FilePath);}/*** 导出表格 无返回** @param listParamColumn 表头数据* @param dataList        行内数据* @param materialColumn  物料基础信息合并单元格* @param fileHelper      上传附件* @param vendorColumn    供应商合并单元格* @param vendorList      供应商数据* @param awardVO         计算定选价格* @param paramsCode      上传附件的场景值* @throws Exception*/public FileInfoVo awardExportExcel(List<Column> listParamColumn, List<T> dataList, HashMap<String, String> paramsCode, int materialColumn, FileHelper fileHelper, int vendorColumn, List<QuoteAmountVO> vendorList, AwardVO awardVO) throws Exception {int dataCount = dataList.size();int maxColumn = 65535;int pieces = dataCount / maxColumn;for (int i = 1; i <= pieces; i++) {HSSFSheet sheet = this.workbook.createSheet(this.title + i);List<T> subList = dataList.subList((i - 1) * maxColumn, i * maxColumn);writeSheet(sheet, subList, listParamColumn, true, true);}String sheetName = this.title;if (pieces != 0) {sheetName = this.title + (pieces + 1);}HSSFSheet sheet = this.workbook.createSheet(sheetName);writeSheet(sheet, dataList.subList(pieces * maxColumn, dataCount), listParamColumn, true, true);// 构建结尾数据List<AwardExportDTO> exportDTOList = Lists.newArrayList();exportDTOList.add(new AwardExportDTO().setCode("currencyName").setName("报价币种"));exportDTOList.add(new AwardExportDTO().setCode("adjustExtent").setName("首末总报价调整幅度（含税）"));exportDTOList.add(new AwardExportDTO().setCode("adjustAmount").setName("首末总报价调整额度（含税）"));exportDTOList.add(new AwardExportDTO().setCode("adjustExtentExclTax").setName("首末总报价调整幅度（未税）"));exportDTOList.add(new AwardExportDTO().setCode("adjustAmountExclTax").setName("首末总报价调整额度（未税）"));exportDTOList.add(new AwardExportDTO().setCode("amount").setName("含税报价总计"));exportDTOList.add(new AwardExportDTO().setCode("amountExclTax").setName("未税报价总计"));exportDTOList.add(new AwardExportDTO().setCode("awardAmount").setName("含税定选总计"));exportDTOList.add(new AwardExportDTO().setCode("awardAmountExclTax").setName("未税定选总计"));List<AwardLineVO> awardLineVOList = awardVO.getAwardLineVOList();HashMap<Long, BigDecimal> vendorAmountMap = new HashMap<>(16);HashMap<Long, BigDecimal> vendorAmountExclMap = new HashMap<>(16);awardLineVOList.forEach(item -> {List<AwardLineVendorVO> awardLineVendorVOS = item.getAwardLineVendorVOS();for (AwardLineVendorVO vendorVO : awardLineVendorVOS) {if (Objects.equals(vendorVO.getSelectedStatus(), BooleanEnum.TRUE.getCode())) {Long vendorId = vendorVO.getParticipatingVendorId();BigDecimal amount = vendorVO.getAmount();if (vendorAmountMap.containsKey(vendorId)) {BigDecimal addAmount = vendorAmountMap.get(vendorId);amount = amount.add(addAmount);}vendorAmountMap.put(vendorId, amount);BigDecimal amountExcl = vendorVO.getAmountExclTax();if (vendorAmountExclMap.containsKey(vendorId)) {BigDecimal addAmount = vendorAmountExclMap.get(vendorId);amountExcl = amountExcl.add(addAmount);}vendorAmountExclMap.put(vendorId, amountExcl);}}});for (int i = 0; i < exportDTOList.size(); i++) {AwardExportDTO awardExportDTO = exportDTOList.get(i);// 拼接 后面的合并表格int lastRowNum = sheet.getLastRowNum() + 1;HSSFRow a = sheet.createRow(lastRowNum);HSSFCell ac = a.createCell(1);ac.setCellValue(awardExportDTO.getName());CellRangeAddress one = new CellRangeAddress(lastRowNum, lastRowNum, 1, materialColumn);sheet.addMergedRegion(one);for (int j = 0; j < vendorList.size(); j++) {QuoteAmountVO amountVO = vendorList.get(j);int firstCol = materialColumn + 1 + j * vendorColumn;HSSFCell ab = a.createCell(firstCol);String column = fillColumn(awardExportDTO.getCode(), amountVO);if (Objects.equals(awardExportDTO.getCode(), "amount") || Objects.equals(awardExportDTO.getCode(), "amountExclTax")) {BigDecimal columnDecimal = new BigDecimal(column).setScale(amountVO.getCurrencyAmountPrecision(), RoundingMode.HALF_UP);column = amountVO.getCurrencySymbol() + columnDecimal;}if (Objects.equals(column, "0E-8") || Objects.equals(column, "null")) {column = "--";}if (Objects.equals(awardExportDTO.getCode(), "adjustExtent") || Objects.equals(awardExportDTO.getCode(), "adjustExtentExclTax")) {if (Objects.equals(column, "0E-8") || Objects.equals(column, "null") || Objects.equals(column, "--")) {column = "0%";} else {column = column + "%";}}Long vendorId = amountVO.getParticipatingVendorId();if (Objects.equals(awardExportDTO.getCode(), "awardAmount") && vendorAmountMap.containsKey(vendorId)) {BigDecimal columnDecimal = vendorAmountMap.get(vendorId).setScale(amountVO.getCurrencyAmountPrecision(), RoundingMode.HALF_UP);column = amountVO.getCurrencySymbol() + columnDecimal;}if (Objects.equals(awardExportDTO.getCode(), "awardAmountExclTax") && vendorAmountExclMap.containsKey(vendorId)) {BigDecimal columnDecimal = vendorAmountExclMap.get(vendorId).setScale(amountVO.getCurrencyAmountPrecision(), RoundingMode.HALF_UP);column = amountVO.getCurrencySymbol() + columnDecimal;}ab.setCellValue(column);CellRangeAddress two = new CellRangeAddress(lastRowNum, lastRowNum, firstCol, firstCol + vendorColumn - 1);sheet.addMergedRegion(two);}}ByteArrayOutputStream fileOutputStream = new ByteArrayOutputStream();workbook.write(fileOutputStream);String fileName = sheet.getSheetName() + "-" + DateUtil.format(new Date(), "yyyyMMdd-HHmmss") + ExcelTypeEnum.XLSX.getValue();return fileHelper.uploadRemoteFile(awardVO.getTenantId(), paramsCode.get("moduleCode"), paramsCode.get("sceneCode"), null, fileName, fileOutputStream.toByteArray());
//        save(this.workbook, FilePath);}private String fillColumn(String code, QuoteAmountVO amountVO) throws IllegalAccessException {Class<?> targetClass = amountVO.getClass();//获取类中所有字段集合Field[] fields = targetClass.getDeclaredFields();//遍历字段for (Field field : fields) {//取消安全检查，允许防伪private修饰的field.setAccessible(true);String name = field.getName();//字段名和值if (Objects.equals(code, name)) {return String.valueOf(field.get(amountVO));}}return "";}/*** 返回workbook** @param listTpamscolumn 表头数据* @param datas           行内数据* @param flag            是否写入行内数据* @return* @throws Exception*/public HSSFWorkbook exportWorkbook(List<Column> listTpamscolumn, List<T> datas, boolean flag) throws Exception {splitDataToSheets(datas, listTpamscolumn, flag, false);return this.workbook;}/*** 导出表格 有返回值** @param listTpamscolumn 表头数据* @param datas           行内数据* @param flag            只输出表头数据* @param rowFlag* @return* @throws Exception*/public InputStream exportExcel(List<Column> listTpamscolumn, List<T> datas, boolean flag, boolean rowFlag) throws Exception {splitDataToSheets(datas, listTpamscolumn, flag, rowFlag);return save(this.workbook);}/*** 导出Excel,适用于web导出excel** @param sheet            excel* @param data             行内数据* @param listParamsColumn 表头数据* @param flag             只输出表头数据* @param rowFlag          输出展示数据的结构(表头下面行的数据)* @throws Exception*/private void writeSheet(HSSFSheet sheet, List<T> data, List<Column> listParamsColumn, boolean flag, boolean rowFlag) throws Exception {sheet.setDefaultColumnWidth(colWidth);sheet.setDefaultRowHeightInPoints(rowHeight);sheet = createHead(sheet, listParamsColumn.get(0).getTotalRow(), listParamsColumn.get(0).getTotalCol());createHead(listParamsColumn, sheet, 0);//控制是否 bug修复：每次写入行数据时，总是漏第一个条数据 rowIndex 错误if (flag) {writeSheetContent(listParamsColumn, data, sheet, listParamsColumn.get(0).getTotalRow() + 1, rowFlag);}}/*** 拆分sheet，因为每个sheet不能超过65535，否则会报异常** @param data             行内数据* @param listParamsColumn 表头数据* @param flag             只输出表头数据* @param rowFlag          输出展示数据的结构(表头下面行的数据)* @throws Exception*/private void splitDataToSheets(List<T> data, List<Column> listParamsColumn, boolean flag, boolean rowFlag) throws Exception {int dataCount = data.size();int maxColumn = 65535;int pieces = dataCount / maxColumn;for (int i = 1; i <= pieces; i++) {HSSFSheet sheet = this.workbook.createSheet(this.title + i);List<T> subList = data.subList((i - 1) * maxColumn, i * maxColumn);writeSheet(sheet, subList, listParamsColumn, flag, rowFlag);}HSSFSheet sheet = this.workbook.createSheet(this.title + (pieces));writeSheet(sheet, data.subList(pieces * maxColumn, dataCount), listParamsColumn, flag, rowFlag);}/*** 把数据写入到单元格** @param listParamsColumn 表头数据* @param dataList         行内数据* @param sheet            工作表（excel分页）* @throws Exception void*/private void writeSheetContent(List<Column> listParamsColumn, List<T> dataList, HSSFSheet sheet, int rowIndex, boolean rowFlag) throws Exception {HSSFRow row = null;List<Column> listCol = new ArrayList<>();rowFlag = false;if (rowFlag) {//暂时没有用 后面扩展用for (int i = 0, index = rowIndex; i < dataList.size(); i++, index++) {row = sheet.createRow(index);//创建行for (int j = 0; j < listParamsColumn.size(); j++) {createColl(row, j, listParamsColumn.get(j).getFieldName(), dataList.get(i));}}} else {getColumnList(listParamsColumn, listCol);for (int i = 0, index = rowIndex; i < dataList.size(); i++, index++) {row = sheet.createRow(index);//创建行for (int j = 0; j < listCol.size(); j++) {Column c = listCol.get(j);createCol(row, c, dataList.get(i));}}}}/*** 根据list 来创建单元格 暂时没有用** @param row* @param j* @param finame* @param t*/private void createColl(HSSFRow row, int j, String finame, T t) {HSSFCell cell = row.createCell(j);  //创建单元格cell.setCellStyle(this.styleBody); //设置单元格样式String text = "";if (t instanceof List) {List<Map> temp = (List<Map>) t;if (j >= temp.size()) return;text = String.valueOf(temp.get(j).get(finame) == null ? "" : temp.get(j).get(finame));}HSSFRichTextString richString = new HSSFRichTextString(text);cell.setCellValue(richString);}/*** 把column的columnList整理成一个list<column> 过滤表头的脏数据** @param list    表头数据* @param listCol 返回新的list* @return List<column>*/private void getColumnList(List<Column> list, List<Column> listCol) {for (int i = 0; i < list.size(); i++) {if (list.get(i).getFieldName() != null) {listCol.add(list.get(i));}List<Column> listChilren = list.get(i).getListTpamscolumn();if (listChilren.size() > 0) {getColumnList(listChilren, listCol);}}}/*** 保存Excel到InputStream，此方法适合web导出excel** @param workbook* @return*/private InputStream save(HSSFWorkbook workbook) {ByteArrayOutputStream bos = new ByteArrayOutputStream();try {workbook.write(bos);InputStream bis = new ByteArrayInputStream(bos.toByteArray());return bis;} catch (Exception e) {e.printStackTrace();throw new RuntimeException(e);}}/*** 保存excel到本机指定的路径** @param workbook* @param filePath* @throws IOException*/private void save(HSSFWorkbook workbook, String filePath) {File file = new File(filePath);if (!file.getParentFile().exists()) {file.getParentFile().mkdirs();}FileOutputStream fOut = null;try {fOut = new FileOutputStream(file);workbook.write(fOut);fOut.flush();} catch (Exception e) {e.printStackTrace();}try {if (null != fOut) fOut.close();} catch (Exception e1) {}}/*** 创建行** @param row         Excel对应的行* @param tpamscolumn 当前单元格属性* @param v* @param j* @return* @throws Exception*/public int createRowVal(HSSFRow row, Column tpamscolumn, T v, int j) throws Exception {//遍历标题if (tpamscolumn.getListTpamscolumn() != null && tpamscolumn.getListTpamscolumn().size() > 0) {for (int i = 0; i < tpamscolumn.getListTpamscolumn().size(); i++) {createRowVal(row, tpamscolumn.getListTpamscolumn().get(i), v, j);}} else {createCol(row, tpamscolumn, v);}return j;}/*** 创建单元格** @param row         Excel对应的行* @param tpamscolumn 当前单元格对象* @param v* @throws Exception*/public void createCol(HSSFRow row, Column tpamscolumn, T v) throws Exception {HSSFCell cell = row.createCell(tpamscolumn.getCol());  //创建单元格cell.setCellStyle(this.styleBody); //设置单元格样式final Object[] value = {null};if (v instanceof Map) {Map m = (Map) v;m.forEach((k, val) -> {if (k.equals(tpamscolumn.getFieldName()) && !tpamscolumn.isHasChilren()) {value[0] = val;}});} else {Class<?> cls = v.getClass();// 拿到该类Field[] fields = cls.getDeclaredFields();// 获取实体类的所有属性，返回Field数组for (int i = 0; i < fields.length; i++) {Field f = fields[i];f.setAccessible(true); // 设置些属性是可以访问的if (tpamscolumn.getFieldName().equals(f.getName()) && !tpamscolumn.isHasChilren())// && !tpamscolumn.isHasChilren()value[0] = f.get(v);if (value[0] instanceof Date)value[0] = parseDate((Date) value[0]);}}if (value[0] != null) {HSSFRichTextString richString = new HSSFRichTextString(value[0].toString());cell.setCellValue(richString);}}/*** 时间转换** @param date* @return String*/private String parseDate(Date date) {String dateStr = "";try {dateStr = this.sdf.format(date);} catch (Exception e) {e.printStackTrace();}return dateStr;}/*** 根据数据的行数和列数，在excel创建单元格cell** @param sheetCo excel分页* @param r       excel 行数* @param c       excel 列数* @return*/public HSSFSheet createHead(HSSFSheet sheetCo, int r, int c) {for (int i = 0; i < r; i++) {HSSFRow row = sheetCo.createRow(i);for (int j = 0; j < c; j++) {HSSFCell cell = row.createCell(j);}}return sheetCo;}/*** 使用递归 在excel写入表头数据 支持单级，多级表头的创建** @param listTpamscolumn 表头数据* @param sheetCo         哪个分页* @param rowIndex        当前Excel的第几行*/public void createHead(List<Column> listTpamscolumn, HSSFSheet sheetCo, int rowIndex) {HSSFRow row = sheetCo.getRow(rowIndex);
//        if(row == null)row = sheetCo.createRow(rowIndex);int len = listTpamscolumn.size();//当前行 有多少列for (int i = 0; i < len; i++) {//i是headers的索引，n是Excel的索引 多级表头Column tpamscolumn = listTpamscolumn.get(i);//创建这一行的第几列单元格int r = tpamscolumn.getRow();int rLen = tpamscolumn.getrLen();int c = tpamscolumn.getCol();int cLen = tpamscolumn.getcLen();int endR = r + rLen;int endC = c + cLen;if (endC > c) {endC--;}HSSFCell cell = row.getCell(c);
//            if( null == cell)cell = row.createCell(c);HSSFRichTextString text = new HSSFRichTextString(tpamscolumn.getContent());cell.setCellStyle(this.styleHead); //设置表头样式cell.setCellValue(text);// 合并单元格CellRangeAddress cra = new CellRangeAddress(r, endR, c, endC);sheetCo.addMergedRegion(cra);// 使用RegionUtil类为合并后的单元格添加边框RegionUtil.setBorderBottom(1, cra, sheetCo, this.workbook); // 下边框RegionUtil.setBorderLeft(1, cra, sheetCo, this.workbook); // 左边框RegionUtil.setBorderRight(1, cra, sheetCo, this.workbook); // 有边框if (tpamscolumn.isHasChilren()) {rowIndex = r + 1;createHead(tpamscolumn.getListTpamscolumn(), sheetCo, rowIndex);}}}/*** 转换成column对象* 支持List<T>的数据结构:map String ，只能是单级的数据** @param list 需要转换的数据* @return*/public List<Column> columnTransformer(List<T> list) {List<Column> lc = new ArrayList<>();if (list.get(0) instanceof Map) {final int[] i = {1};for (Map<String, String> m : (List<Map<String, String>>) list) {m.forEach((k, val) -> {Column tpamscolumn = new Column();tpamscolumn.setId(String.valueOf(i[0]));tpamscolumn.setPid("0");tpamscolumn.setContent(k);tpamscolumn.setFieldName(val);lc.add(tpamscolumn);i[0]++;});}} else {int i = 1;for (String s : (List<String>) list) {Column tpamscolumn = new Column();tpamscolumn.setId(String.valueOf(i));tpamscolumn.setPid("0");tpamscolumn.setContent(s);tpamscolumn.setFieldName(null);lc.add(tpamscolumn);i++;}}setParm(lc, "0");//处理一下List<Column> s = TreeTool.buildByRecursive(lc, "0");setColNum(lc, s, s);return s;}/*** 转换成column对象 返回tree数据结构* 支持：List<map>、某个具体对象（entity）数据的转换** @param list     需要转换的数据* @param id       当前节点id 字段的名称  主键* @param pid      父节点id 字段的名称* @param content  填写表头单元格内容的 字段名称* @param fielName 填写行内数据对的 字段名称* @param rootid   rootid的值* @return* @throws Exception*/public List<Column> columnTransformer(List<T> list, String id, String pid, String content, String fielName, String rootid) throws Exception {// 结果List<Column> lc = new ArrayList<>();if (list.get(0) instanceof Map) {for (Map m : (List<Map>) list) {Column tpamscolumn = new Column();m.forEach((k, val) -> {//java8 以上的遍历方式if (id.equals(k))tpamscolumn.setId(String.valueOf(val));if (pid.equals(k)) tpamscolumn.setPid((String) val);if (content.equals(k)) tpamscolumn.setContent((String) val);if (fielName.equals(k) && fielName != null) tpamscolumn.setFieldName((String) val);});lc.add(tpamscolumn);}} else {for (T t : list) {//反射Column tpamscolumn = new Column();Class cls = t.getClass();Field[] fs = cls.getDeclaredFields();for (int i = 0; i < fs.length; i++) {Field f = fs[i];f.setAccessible(true); // 设置些属性是可以访问的if (id.equals(f.getName()) && f.get(t) != null)tpamscolumn.setId(f.get(t).toString());if (pid.equals(f.getName()) && f.get(t) != null)tpamscolumn.setPid(f.get(t).toString());
//                    if (pid.equals(f.getName()) && ( f.get(t) == null || "".equals(f.get(t)))) tpamscolumn.setPid("0");if (content.equals(f.getName()) && f.get(t) != null)tpamscolumn.setContent(f.get(t).toString());if (f.get(t) != null && fielName != null && fielName.equals(f.getName()))tpamscolumn.setFieldName(f.get(t).toString());}lc.add(tpamscolumn);}}setParm(lc, rootid);//处理一下List<Column> s = TreeTool.buildByRecursive(lc, rootid);setColNum(lc, s, s);return s;}/*** 设置基础的参数** @param list*/public static void setParm(List<Column> list, String rootid) {int row = 0;//excel第几行int rLen = 0; //excel 跨多少行// 总行数int totalRow = TreeTool.getMaxStep(list);// 总列数int totalCol = TreeTool.getDownChilren(list, rootid);for (int i = 0; i < list.size(); i++) {Column poit = list.get(i);// 往上遍历treeint tree_step = TreeTool.getTreeStep(list, poit.getPid(), 0);poit.setTree_step(tree_step);// 设置第几行poit.setRow(tree_step);//判断是否有节点boolean hasCh = TreeTool.hasChild(list, poit);poit.setHasChilren(hasCh);if (hasCh) {poit.setrLen(0);//设置跨多少行} else {if (tree_step < totalRow) {rLen = totalRow - tree_step;}poit.setrLen(rLen);}
//            boolean flag=false;//控制只有root 节点才有总的行数信息
//            if(rootid == null && rootid == poit.getId() )flag = true;
//            if(rootid != null && rootid.equals(poit.getId()))flag = true;
//            if(flag){
//
//            }poit.setTotalRow(totalRow);poit.setTotalCol(totalCol);}}/*** 设置基础的参数** @param list     所有list数据，一条一条* @param treeList 转成tree结构的list*/public static void setColNum(List<Column> list, List<Column> treeList, List<Column> flist) {
//        int col = pcIndex;//excel第几列
//        int cLen ;//xcel跨多少列List<Column> new_list = new ArrayList<>();//新的遍历listfor (int i = 0; i < treeList.size(); i++) {Column poit = treeList.get(i);
//            String temp_id = TreeTool.getStepFid(list,poit.getId() ,1);int col = TreeTool.getFCol(list, poit.getPid()).getCol();int brotherCol = TreeTool.getBrotherChilNum(list, poit);poit.setCol(col + brotherCol);int cLen = TreeTool.getDownChilren(list, poit.getId());if (cLen <= 1) cLen = 0;
//            else  cLen--;poit.setcLen(cLen);//设置跨多少列if (poit.getListTpamscolumn().size() > 0) {new_list.addAll(poit.getListTpamscolumn());}}if (new_list.size() > 0) {setColNum(list, new_list, flist);}}
//========上部分是导出excel的使用（生成excel），下部分是解析excel，由于excel导入==================================================================================================================================/*** 根据HSSFCell类型设置数据** @param cell 单元格* @return*/public static String getCellFormatValue(Cell cell) {String cellvalue = "";if (cell != null) {switch (cell.getCellType()) { // 判断当前Cell的Typecase HSSFCell.CELL_TYPE_NUMERIC:  // 如果当前Cell的Type为NUMERICcase HSSFCell.CELL_TYPE_FORMULA: {// 判断当前的cell是否为Dateif (HSSFDateUtil.isCellDateFormatted(cell)) {Date date = cell.getDateCellValue();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");cellvalue = sdf.format(date);} else { // 如果是纯数字cellvalue = String.valueOf(cell.getNumericCellValue());}break;}case HSSFCell.CELL_TYPE_STRING:  // 如果当前Cell的Type为STRIN// 取得当前的Cell字符串cellvalue = cell.getRichStringCellValue().getString();break;default:  // 默认的Cell值cellvalue = "";}} else {cellvalue = "";}return cellvalue;}/*** 描述：根据文件后缀，自适应上传文件的版本** @param inStr,fileName* @return* @throws Exception*/public static Workbook getWorkbookType(InputStream inStr, String fileName) throws Exception {Workbook wb = null;String fileType = fileName.substring(fileName.lastIndexOf("."));if (".xls".equals(fileType)) {wb = new HSSFWorkbook(inStr);  //2003-} else if (".xlsx".equals(fileType)) {wb = new XSSFWorkbook(inStr);  //2007+} else {throw new Exception("导入格式错误");}return wb;}/*** 获取单元格数据内容为字符串类型的数据** @param cell Excel单元格* @return String 单元格数据内容*/public static String getStringCellValue(Cell cell) {String strCell = "";if (cell == null) {return "";}switch (cell.getCellType()) {case Cell.CELL_TYPE_STRING:strCell = cell.getStringCellValue().trim();break;case Cell.CELL_TYPE_NUMERIC:strCell = String.valueOf(cell.getNumericCellValue()).trim();break;case Cell.CELL_TYPE_BOOLEAN:strCell = String.valueOf(cell.getBooleanCellValue()).trim();break;case Cell.CELL_TYPE_BLANK:strCell = "";break;default:strCell = "";break;}if (strCell.equals("") || strCell == null) {return "";}return strCell;}/*** 判断指定的单元格是否是合并单元格** @param sheet* @param row    行下标* @param column 列下标* @return*/public boolean isMergedRegion(Sheet sheet, int row, int column) {int sheetMergeCount = sheet.getNumMergedRegions();for (int i = 0; i < sheetMergeCount; i++) {CellRangeAddress range = sheet.getMergedRegion(i);int firstColumn = range.getFirstColumn();int lastColumn = range.getLastColumn();int firstRow = range.getFirstRow();int lastRow = range.getLastRow();if (row >= firstRow && row <= lastRow) {if (column >= firstColumn && column <= lastColumn) {return true;}}}return false;}/*** 获取合并单元格的值** @param sheet* @param row    行下标* @param column 列下标* @return*/public String getMergedRegionValue(Sheet sheet, int row, int column) {int sheetMergeCount = sheet.getNumMergedRegions();for (int i = 0; i < sheetMergeCount; i++) {CellRangeAddress ca = sheet.getMergedRegion(i);int firstColumn = ca.getFirstColumn();int lastColumn = ca.getLastColumn();int firstRow = ca.getFirstRow();int lastRow = ca.getLastRow();if (row >= firstRow && row <= lastRow) {if (column >= firstColumn && column <= lastColumn) {Row fRow = sheet.getRow(firstRow);Cell fCell = fRow.getCell(firstColumn);return getStringCellValue(fCell);}}}return "";}/*** 获取excel的值 返回的 List<List<String>>的数据结构** @param fileUrl  文件路径* @param sheetNum 工作表（第几分页[1,2,3.....]）* @return List<List < String>>*/public List<List<String>> getExcelValues(String fileUrl, int sheetNum) throws Exception {List<List<String>> values = new ArrayList<List<String>>();File file = new File(fileUrl);InputStream is = new FileInputStream(file);Workbook workbook = WorkbookFactory.create(is);int sheetCount = sheetNum - 1; //workbook.getNumberOfSheets();//sheet 数量,可以只读取手动指定的sheet页//int sheetCount1= workbook.getNumberOfSheets();Sheet sheet = workbook.getSheetAt(sheetCount); //读取第几个工作表sheetint rowNum = sheet.getLastRowNum();//有多少行for (int i = 1; i <= rowNum; i++) {Row row = sheet.getRow(i);//第i行if (row == null) {//过滤空行continue;}List<String> list = new ArrayList<>();int colCount = sheet.getRow(0).getLastCellNum();//用表头去算有多少列，不然从下面的行计算列的话，空的就不算了for (int j = 0; j < colCount; j++) {//第j列://+1是因为最后一列是空 也算进去Cell cell = row.getCell(j);String cellValue;boolean isMerge = false;if (cell != null) {isMerge = isMergedRegion(sheet, i, cell.getColumnIndex());}//判断是否具有合并单元格if (isMerge) {cellValue = getMergedRegionValue(sheet, row.getRowNum(), cell.getColumnIndex());} else {cellValue = getStringCellValue(cell);}list.add(cellValue);}values.add(list);}return values;}/*** 判断整行是否为空** @param row    excel得行对象* @param maxRow 有效值得最大列数*/private static boolean CheckRowNull(Row row, int maxRow) {int num = 0;for (int j = 0; j < maxRow; j++) {Cell cell = row.getCell(j);if (cell == null || cell.equals("") || cell.getCellType() == HSSFCell.CELL_TYPE_BLANK) {num++;}}if (maxRow == num) return true;return false;}/*** 根据sheet数获取excel的值 返回List<List<Map<String,String>>>的数据结构** @param fileUrl  文件路径* @param sheetNum 工作表（第几分页[1,2,3.....]）* @return List<List < Map < String, String>>>*/public List<List<Map<String, String>>> getExcelMapVal(String fileUrl, int sheetNum) throws Exception {List<List<Map<String, String>>> values = new ArrayList<List<Map<String, String>>>();File file = new File(fileUrl);InputStream is = new FileInputStream(file);Workbook workbook = WorkbookFactory.create(is);int sheetCount = sheetNum - 1; //workbook.getNumberOfSheets();//sheet 数量,可以只读取手动指定的sheet页//int sheetCount1= workbook.getNumberOfSheets();Sheet sheet = workbook.getSheetAt(sheetCount); //读取第几个工作表sheetint rowNum = sheet.getLastRowNum();//有多少行Row rowTitle = sheet.getRow(0);//第i行int colCount = sheet.getRow(0).getLastCellNum();//用表头去算有多少列，不然从下面的行计算列的话，空的就不算了for (int i = 1; i <= rowNum; i++) {Row row = sheet.getRow(i);//第i行if (row == null || CheckRowNull(row, colCount)) {//过滤空行continue;}List<Map<String, String>> list = new ArrayList<Map<String, String>>();for (int j = 0; j < colCount; j++) {//第j列://+1是因为最后一列是空 也算进去Map<String, String> map = new HashMap<>();Cell cell = row.getCell(j);Cell cellTitle = rowTitle.getCell(j);String cellValue;String cellKey = getStringCellValue(cellTitle);boolean isMerge = false;if (cell != null) {isMerge = isMergedRegion(sheet, i, cell.getColumnIndex());}//判断是否具有合并单元格if (isMerge) {cellValue = getMergedRegionValue(sheet, row.getRowNum(), cell.getColumnIndex());} else {cellValue = getStringCellValue(cell);}map.put(cellKey, cellValue);list.add(map);}values.add(list);}return values;}/*** 获取当前excel的工作表sheet总数** @param fileUrl* @return* @throws Exception*/public int hasSheetCount(String fileUrl) throws Exception {File file = new File(fileUrl);InputStream is = new FileInputStream(file);Workbook workbook = WorkbookFactory.create(is);int sheetCount = workbook.getNumberOfSheets();return sheetCount;}
}


/*** 表头的实体类： 在具体的项目里，可以是你从数据库里查询出来的数据*/
@Data
public class TitleEntity {public String t_id;public String t_pid;public String t_content;public String t_fileName;public TitleEntity() {}public TitleEntity(String t_id, String t_pid, String t_content, String t_fileName) {this.t_id = t_id;this.t_pid = t_pid;this.t_content = t_content;this.t_fileName = t_fileName;}
}


import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;/*** 处理tree结构的数据 工具类*/
public class TreeTool {/*** 传入的id 必须存在list集合里* 获取某节点的深度** @param list* @param id   根节点* @param step* @return*/public static int getTreeStep(List<Column> list, String id, int step) {if ("".equals(id) || null == id) return step;for (Column cc : list) {if (id.equals(cc.getId())) {int temp = step + 1;return getTreeStep(list, cc.getPid(), temp);}}return step;}/*** 遍历所有数据 获取树最大的深度** @param list* @return*/public static int getMaxStep(List<Column> list) {List<Integer> nums = new ArrayList<Integer>();for (Column cc : list) {nums.add(getTreeStep(list, cc.getId(), 0));}return Collections.max(nums);}/*** 获取最底部子节点的个数 所有叶子节点个数** @param list* @param did* @return*/public static int getDownChilren(List<Column> list, String did) {int sum = 0;for (Column cc : list) {if (did.equals(cc.getPid())) {sum++;//判断该节点 是否有子节点if (hasChild(list, cc)) {sum += getDownChilren(list, cc.getId()) - 1;}}}return sum;}/*** 获取父节点** @param list 所有的list数据，一条一条* @param did  当前节点id* @return*/public static Column getFCol(List<Column> list, String did) {for (Column cc : list) {if (did != null && did.equals(cc.getId())) {return cc;}if (did == null && did == cc.getId()) {return cc;}}return new Column() {{setCol(0);setRow(0);}};}/*** 获取兄弟节点个数 这个必须是有排序的** @param list   所有的list数据，一条一条* @param column 当前节点信息* @return*/public static int getBrotherChilNum(List<Column> list, Column column) {int sum = 0;for (Column cc : list) {if (column.getId().equals(cc.getId())) {break;}if (!column.getPid().equals(cc.getPid())) {continue;}int temp = getDownChilren(list, cc.getId());if (temp == 0 || temp == 1)sum++;elsesum += temp;}return sum;}/*** 根据某节点的第几层的父节点id** @param list 所有的list数据，一条一条* @param id   当前节点id* @param step 第几层(深度 从零开始)* @return*/public static String getStepFid(List<Column> list, String id, int step) {String f_id = null;for (Column cc : list) {if (id.equals(cc.getId())) {int cstep = getTreeStep(list, cc.getId(), 0);if (step == cstep) {return id;}int fstep = getTreeStep(list, cc.getPid(), 0);if (step == fstep) {f_id = cc.getPid();break;} else {getStepFid(list, cc.getPid(), step);}}}return f_id;}/*** 判断是否有子节点** @param list 遍历的数据* @param node 某个节点* @return*/public static boolean hasChild(List<Column> list, Column node) {return getChildList(list, node).size() > 0 ? true : false;}/*** 得到子节点列表** @param list 遍历的数据* @param node 某个节点* @return*/public static List<Column> getChildList(List<Column> list, Column node) {List<Column> nodeList = new ArrayList<Column>();Iterator<Column> it = list.iterator();while (it.hasNext()) {Column n = (Column) it.next();if (n.getPid() != null && n.getPid().equals(node.getId())) {nodeList.add(n);}}return nodeList;}/*** 使用递归方法建树** @param treeNodes* @return*/public static List<Column> buildByRecursive(List<Column> treeNodes, String rootID) {List<Column> trees = new ArrayList<>();boolean flag = false;boolean sflag = false;for (Column treeNode : treeNodes) {if ((rootID == null && rootID == treeNode.getId())) {flag = true;}if (rootID != null && rootID.equals(treeNode.getId())) {flag = true;}if (flag) {trees.add(findChildren(treeNode, treeNodes));flag = false;}}if (trees.size() <= 0) {for (Column treeNode : treeNodes) {if ((rootID == null && rootID == treeNode.getPid())) {sflag = true;}if (rootID != null && rootID.equals(treeNode.getPid())) {sflag = true;}if (sflag) {trees.add(findChildren(treeNode, treeNodes));sflag = false;}}}return trees;}/*** 递归查找子节点** @param treeNodes* @return*/public static Column findChildren(Column treeNode, List<Column> treeNodes) {for (Column it : treeNodes) {if (treeNode.getId().equals(it.getPid())) {if (treeNode.getListTpamscolumn() == null) {treeNode.setListTpamscolumn(new ArrayList<Column>());}treeNode.getListTpamscolumn().add(findChildren(it, treeNodes));}}return treeNode;}
}


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** 测试类*/
public class TextMain {public static void main(String[] args) throws Exception {
//        单级的表头
//        Map<String,String> map=new HashMap<String,String>();
//        map.put("登录名","u_login_id");
//        Map<String,String>  map1=new HashMap<String,String>();
//        map1.put("用户名","u_name");
//        Map<String,String>  map2=new HashMap<String,String>();
//        map2.put("角色","u_role");
//        Map<String,String>  map3=new HashMap<String,String>();
//        map3.put("部门","u_dep");//d_name
//        Map<String,String>  map4=new HashMap<String,String>();
//        map4.put("用户类型","u_type");
//        List<Map<String,String>> titleList=new ArrayList<>();
//        titleList.add(map); titleList.add(map1); titleList.add(map2); titleList.add(map3); titleList.add(map4);
//        //单级的 行内数据
//        List<Map<String,String>> rowList=new ArrayList<>();
//        for(int i=0;i<7;i++){
//            Map m= new HashMap<String,String>();
//            m.put("u_login_id","登录名"+i); m.put("u_name","张三"+i);
//            m.put("u_role","角色"+i); m.put("u_dep","部门"+i);
//            m.put("u_type","用户类型"+i);
//            rowList.add(m);
//        }
//        ExcelTool excelTool = new ExcelTool("单级表头的表格",15,20);
//        List<Column>  titleData=excelTool.columnTransformer(titleList);
//        excelTool.exportExcel(titleData,rowList,"D://outExcel.xls",true,false);//List<Map>数据 多级表头,数据如下://        登录名  姓名       aa//                      角色    部门
//        List<Map<String,String>> titleList=new ArrayList<>();
//        Map<String,String> titleMap=new HashMap<String,String>();
//        titleMap.put("id","11");titleMap.put("pid","0");titleMap.put("content","登录名");titleMap.put("fielName","u_login_id");
//        Map<String,String> titleMap1=new HashMap<String,String>();
//        titleMap1.put("id","1");titleMap1.put("pid","0");titleMap1.put("content","姓名");titleMap1.put("fielName","u_name");
//        Map<String,String> titleMap2=new HashMap<String,String>();
//        titleMap2.put("id","2");titleMap2.put("pid","0");titleMap2.put("content","角色加部门");titleMap2.put("fielName",null);
//        Map<String,String> titleMap3=new HashMap<String,String>();
//        titleMap3.put("id","3");titleMap3.put("pid","2");titleMap3.put("content","角色");titleMap3.put("fielName","u_role");
//        Map<String,String> titleMap4=new HashMap<String,String>();
//        titleMap4.put("id","4");titleMap4.put("pid","2");titleMap4.put("content","部门");titleMap4.put("fielName","u_dep");
//        Map<String,String> titleMap5=new HashMap<String,String>();
//        titleMap5.put("id","22");titleMap5.put("pid","0");titleMap5.put("content","角色加部门1");titleMap5.put("fielName",null);
//        Map<String,String> titleMap6=new HashMap<String,String>();
//        titleMap6.put("id","22_1");titleMap6.put("pid","22");titleMap6.put("content","角色1");titleMap6.put("fielName","u_role");
//        Map<String,String> titleMap7=new HashMap<String,String>();
//        titleMap7.put("id","22_2");titleMap7.put("pid","22");titleMap7.put("content","部门1");titleMap7.put("fielName","u_dep");
//        titleList.add(titleMap); titleList.add(titleMap1); titleList.add(titleMap2); titleList.add(titleMap3); titleList.add(titleMap4);
//        titleList.add(titleMap5); titleList.add(titleMap6); titleList.add(titleMap7);
//       // 单级的 行内数据
//        List<Map<String,String>> rowList=new ArrayList<>();
//        for(int i=0;i<7;i++){
//            Map m= new HashMap<String,String>();
//            m.put("u_login_id","登录名"+i); m.put("u_name","张三"+i);
//            m.put("u_role","角色"+i); m.put("u_dep","部门"+i);
//            m.put("u_type","用户类型"+i);
//            rowList.add(m);
//        }
//        ExcelTool excelTool = new ExcelTool("List<Map>数据 多级表头表格",20,20);
//        List<Column>  titleData=excelTool.columnTransformer(titleList,"id","pid","content","fielName","0");
//        excelTool.exportExcel(titleData,rowList,"D://outExcel.xls",true,false);//实体类（entity）数据 多级表头,数据如下://        登录名  姓名       aa//                      角色    部门List<TitleEntity> titleList = new ArrayList<>();TitleEntity titleEntity1 = new TitleEntity("1", "0", "序号", "num");TitleEntity titleEntity2 = new TitleEntity("2", "0", "供应商1", null);TitleEntity titleEntity5 = new TitleEntity("3", "0", "供应商2", null);TitleEntity titleEntity3 = new TitleEntity("4", "2", "角色", "code");TitleEntity titleEntity4 = new TitleEntity("5", "2", "部门", "name");TitleEntity titleEntity6 = new TitleEntity("6", "3", "角色", "code");TitleEntity titleEntity7 = new TitleEntity("7", "3", "部门", "name");TitleEntity titleEntity8 = new TitleEntity("8", "0", "供应商3", null);TitleEntity titleEntity9 = new TitleEntity("9", "8", "角色", "code");TitleEntity titleEntity10 = new TitleEntity("10", "8", "部门", "name");titleList.add(titleEntity1);titleList.add(titleEntity2);titleList.add(titleEntity3);titleList.add(titleEntity4);titleList.add(titleEntity5);titleList.add(titleEntity6);titleList.add(titleEntity7);titleList.add(titleEntity8);titleList.add(titleEntity9);titleList.add(titleEntity10);//单级的 行内数据List<Map<String, String>> rowList = new ArrayList<>();for (int i = 0; i < 7; i++) {Map m = new HashMap<String, String>();m.put("num", i);m.put("code", i);m.put("age", i);m.put("name", "名称" + i);rowList.add(m);}ExcelTool excelTool = new ExcelTool("多级表头表格", 20, 20);List<Column> titleData = excelTool.columnTransformer(titleList, "t_id", "t_pid", "t_content", "t_fileName", "0");excelTool.exportExcel(titleData, rowList, "/Users/mayuhan/Downloads/test.xls", true, true);}}

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