poi处理excel基本操作时写的工具类

1.复制单元格

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    public static void copyCell(Workbook wb, Cell srcCell, Cell distCell, boolean copyValueFlag) {
        //新建单元格样式
        CellStyle newStyle = wb.createCellStyle();
        //获取来源的单元格样式
        CellStyle srcStyle = srcCell.getCellStyle();
        //将来源的单元格样式克隆到新的单元格样式
        newStyle.cloneStyleFrom(srcStyle);
        //样式
        newStyle.cloneStyleFrom(newStyle);
        distCell.setCellStyle(newStyle);
        //克隆单元格的评论
        if (srcCell.getCellComment() != null) {
            distCell.setCellComment(srcCell.getCellComment());
        }
        // 不同数据类型处理
        CellType srcCellType = srcCell.getCellTypeEnum();
        distCell.setCellType(srcCellType);
        if (copyValueFlag) {
            if (srcCellType == CellType.NUMERIC) {
                if (DateUtil.isCellDateFormatted(srcCell)) {
                    distCell.setCellValue(srcCell.getDateCellValue());
                } else {
                    distCell.setCellValue(srcCell.getNumericCellValue());
                }
            } else if (srcCellType == CellType.STRING) {
                distCell.setCellValue(srcCell.getRichStringCellValue());
            } else if (srcCellType == CellType.BLANK) {

            } else if (srcCellType == CellType.BOOLEAN) {
                distCell.setCellValue(srcCell.getBooleanCellValue());
            } else if (srcCellType == CellType.ERROR) {
                distCell.setCellErrorValue(srcCell.getErrorCellValue());
            } else if (srcCellType == CellType.FORMULA) {
                distCell.setCellFormula(srcCell.getCellFormula());
            } else {
            }
        }
    }
...

2.行复制

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    /**
     * 行复制功能
     *
     * @param wb 要复制到的Workbook
     * @param fromRow 复制到的行
     * @param toRow 来源的行
     * @param copyValueFlag true的时候赋值里面的值
     * @return [返回类型说明]
     * @author 龙谷情
     * @date 2020/6/9 19:42
     * @exception/throws [异常类型] [异常说明]
     * @since [v1.0]
     */
    public static void copyRow(Workbook wb, Row fromRow, Row toRow, boolean copyValueFlag) {
        toRow.setHeight(fromRow.getHeight());
        for (Iterator cellIt = fromRow.cellIterator(); cellIt.hasNext(); ) {
            Cell tmpCell = (Cell) cellIt.next();
            Cell newCell = toRow.createCell(tmpCell.getColumnIndex());
            //调用单元格赋值方法
            copyCell(wb, tmpCell, newCell, copyValueFlag);
        }
        Sheet worksheet = fromRow.getSheet();
        //获取合并单元格的数量
        int mergedRegionsNum = worksheet.getNumMergedRegions();
        for (int i = 0; i < mergedRegionsNum; i++) {
            CellRangeAddress cellRangeAddress = worksheet.getMergedRegion(i);
            if (cellRangeAddress.getFirstRow() == fromRow.getRowNum()) {
                CellRangeAddress newCellRangeAddress = new CellRangeAddress(toRow.getRowNum(), (toRow.getRowNum() +
                        (cellRangeAddress.getLastRow() - cellRangeAddress.getFirstRow())), cellRangeAddress
                        .getFirstColumn(), cellRangeAddress.getLastColumn());
                worksheet.addMergedRegionUnsafe(newCellRangeAddress);
            }
        }
    }
...