基于使用Apache POI库，对excel在目标行索引的后面添加指定行数,且新增行的格式与模板行保持一致

/**
     * excel添加行数：在目标行索引的后面添加指定行数,且新增行的格式与模板行保持一致
     * @example: copyRows(sheet,3,4,5);   已第4行（从0开始计数）为模板行，在第5行（从0开始计数）后新增5行row，且格式与模板行保持一致
     * 
     * @param sheet
     * @param sourceRowIndex    源行的索引
     * @param targetRowIndex    目标行索引
     * @param numberOfRowsToAdd 新增的行数
     * @throws Exception
     */
    public static void copyRows(Sheet sheet, int sourceRowIndex, int targetRowIndex, int numberOfRowsToAdd) {
        Row sourceRow = sheet.getRow(sourceRowIndex);
        if(sourceRow == null) {
            sourceRow = sheet.createRow(sourceRowIndex);
        }
        for (int i = 0; i < numberOfRowsToAdd; i++) {
            sheet.shiftRows(targetRowIndex + i, sheet.getLastRowNum(), 1);
            Row newRow = sheet.createRow(targetRowIndex + i);
            for (int j = 0; j < sourceRow.getLastCellNum(); j++) 
            {
                Cell sourceCell = sourceRow.getCell(j);
                Cell newCell = newRow.createCell(j);
                newCell.setCellStyle(sourceCell.getCellStyle());
                if (sourceCell.getCellType() == CellType.STRING) {
                    newCell.setCellValue(sourceCell.getStringCellValue());
                } else if (sourceCell.getCellType() == CellType.NUMERIC) {
                    newCell.setCellValue(sourceCell.getNumericCellValue());
                } else if (sourceCell.getCellType() == CellType.BOOLEAN) {
                    newCell.setCellValue(sourceCell.getBooleanCellValue());
                } else if (sourceCell.getCellType() == CellType.FORMULA) {
                    newCell.setCellFormula(sourceCell.getCellFormula());
                }
            }
        }
    }