現象如圖

實現代碼：

1主方法測試

public static void main(String[] args) throws FileNotFoundException, IOException {
?? ??? ?if (args.length < 1) {
?? ??? ??? ?System.out.println("請提供Excel文件名作為參數。");
?? ??? ??? ?System.exit(-1);
?? ??? ?}
?? ??? ?String fileName = args[0];
?? ??? ?FileInputStream fis = new FileInputStream(fileName);
?? ??? ?POIFSFileSystem fs = new POIFSFileSystem(fis);
?? ??? ?HSSFWorkbook wb = new HSSFWorkbook(fs);
?? ??? ?HSSFSheet sheet = wb.getSheetAt(0);
?? ??? ?HSSFSheet ns = MergeRows(sheet, 2, 0);
?? ??? ?wb.write(new FileOutputStream(fileName + "1.xls"));
?? ?}

2實現方法

/**
?? ? * @param sheet
?? ? *??????????? 需要處理的ExcelSheet
?? ? * @param startRow
?? ? *??????????? 開始行
?? ? * @param checkColumn
?? ? *??????????? 進行合并行的依據列，即如果該行的值不為空則需要保留，如果為空則需要將內容合并至上端非空的行
?? ? * @return
?? ? */
?? ?public static HSSFSheet MergeRows(HSSFSheet sheet, int startRow, int checkColumn) {
?? ??? ?ExcelReader excelReader = new ExcelReader();
?? ??? ?HSSFSheet newSheet = sheet.getWorkbook().createSheet(UUIDGenerator.getUUID());
?? ??? ?if (sheet.getLastRowNum() == 0 && sheet.getRow(0) == null || startRow < 0 || checkColumn < 0
?? ??? ???????? || checkColumn > sheet.getPhysicalNumberOfRows()) {
?? ??? ??? ?// 空表同樣返回空表
?? ??? ??? ?// 無效起始行
?? ??? ??? ?// 無效判斷列
?? ??? ??? ?return newSheet;
?? ??? ?}
?? ??? ?{
?? ??? ??? ?// 復制表頭
?? ??? ??? ?for (int i = 0; i < startRow && i < (sheet.getLastRowNum() + 1); i++) {
?? ??? ??? ??? ?HSSFRow newRow = newSheet.createRow(i);
?? ??? ??? ??? ?if (sheet.getRow(i) == null) {
?? ??? ??? ??? ??? ?continue;
?? ??? ??? ??? ?}
?? ??? ??? ??? ?Iterator<Cell> it = sheet.getRow(i).cellIterator();
?? ??? ??? ??? ?while (it.hasNext()) {
?? ??? ??? ??? ??? ?Cell cell = (Cell) it.next();
?? ??? ??? ??? ??? ?if (cell.isPartOfArrayFormulaGroup() && cell.getArrayFormulaRange().getFirstRow() != i) {
?? ??? ??? ??? ??? ??? ?// 合并數據，并且開始行非當前行，忽略，繼續下一個單元格
?? ??? ??? ??? ??? ??? ?continue;
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ?String v = excelReader.getCellFormatValue((HSSFCell) cell);
?? ??? ??? ??? ??? ?if (v != null && v.length() > 0) {
?? ??? ??? ??? ??? ??? ?// 非空單元格，復制至新的Sheet
?? ??? ??? ??? ??? ??? ?newRow.createCell(cell.getColumnIndex()).setCellValue(v);
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ?}

?? ??? ?{
?? ??? ??? ?// 如果checkColumn的值不為空，則創建新的行，否則直接添加至最后一行
?? ??? ??? ?HSSFRow rowNew = null;
?? ??? ??? ?for (int i = startRow; i < sheet.getLastRowNum() + 1; i++) {
?? ??? ??? ??? ?HSSFRow rowOrg = sheet.getRow(i);
?? ??? ??? ??? ?HSSFCell checkCell = rowOrg.getCell(checkColumn);
?? ??? ??? ??? ?String checkCellValue = excelReader.getCellFormatValue(checkCell);
?? ??? ??? ??? ?if (!StringUtils.isHaveNullOrBlankTrim(checkCellValue)) {
?? ??? ??? ??? ??? ?if (newSheet.getRow(newSheet.getLastRowNum()) == null) {
?? ??? ??? ??? ??? ??? ?rowNew = newSheet.createRow(newSheet.getLastRowNum());
?? ??? ??? ??? ??? ?} else {
?? ??? ??? ??? ??? ??? ?rowNew = newSheet.createRow(newSheet.getLastRowNum() + 1);
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ?// 復制本行的值
?? ??? ??? ??? ??? ?Iterator<Cell> it = rowOrg.cellIterator();
?? ??? ??? ??? ??? ?while (it.hasNext()) {
?? ??? ??? ??? ??? ??? ?Cell cell = (Cell) it.next();
?? ??? ??? ??? ??? ??? ?if (cell.isPartOfArrayFormulaGroup() && cell.getArrayFormulaRange().getFirstRow() != i) {
?? ??? ??? ??? ??? ??? ??? ?// 合并數據，并且開始行非當前行，忽略，繼續下一個單元格
?? ??? ??? ??? ??? ??? ??? ?continue;
?? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ??? ?String v = excelReader.getCellFormatValue((HSSFCell) cell);
?? ??? ??? ??? ??? ??? ?if (v != null && v.length() > 0) {
?? ??? ??? ??? ??? ??? ??? ?// 非空單元格，復制至新的Sheet
?? ??? ??? ??? ??? ??? ??? ?rowNew.createCell(cell.getColumnIndex()).setCellValue(v);
?? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?} else {
?? ??? ??? ??? ??? ?// 關鍵列值為空，需要將本行數據合并至最后一行
?? ??? ??? ??? ??? ?if (rowNew != null) {
?? ??? ??? ??? ??? ??? ?Iterator<Cell> it = rowOrg.cellIterator();
?? ??? ??? ??? ??? ??? ?while (it.hasNext()) {
?? ??? ??? ??? ??? ??? ??? ?Cell cell = (Cell) it.next();
?? ??? ??? ??? ??? ??? ??? ?if (cell.isPartOfArrayFormulaGroup() && cell.getArrayFormulaRange().getFirstRow() != i) {
?? ??? ??? ??? ??? ??? ??? ??? ?// 合并數據，并且開始行非當前行，忽略，繼續下一個單元格
?? ??? ??? ??? ??? ??? ??? ??? ?continue;
?? ??? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ??? ??? ?String v = excelReader.getCellFormatValue((HSSFCell) cell);
?? ??? ??? ??? ??? ??? ??? ?if (v != null && v.length() > 0) {
?? ??? ??? ??? ??? ??? ??? ??? ?// 非空單元格，創建或追加至新的Sheet
?? ??? ??? ??? ??? ??? ??? ??? ?HSSFCell c = rowNew.getCell(cell.getColumnIndex());
?? ??? ??? ??? ??? ??? ??? ??? ?if (c == null) {
?? ??? ??? ??? ??? ??? ??? ??? ??? ?rowNew.createCell(cell.getColumnIndex()).setCellValue(v);
?? ??? ??? ??? ??? ??? ??? ??? ?} else {
?? ??? ??? ??? ??? ??? ??? ??? ??? ?c.setCellValue(excelReader.getCellFormatValue(c) + v);
?? ??? ??? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ?}
?? ??? ?return newSheet;
?? ?}

笑圖：

總結

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