如何使用Apache POI将行从现有的Excel工作表复制到新的Excel工作表？

Question

我想比较两个Excel工作表并查找是否有任何行不同，如果要复制不同于该Excel的单行到新Excel中的新行。下面是我从网上获取并尝试的代码段，但是如果我将现有excel的第10行（例如）复制到新excel的第一行，则会出现问题，第1行已在新excel中正确复制，但其余所有行从第一个excel也被复制到新的。我认为问题在于我写新excel的方式[workbook.write（out）]请帮忙！提前致谢！！

    public class RowCopy {

public static void main(String[] args) throws Exception{
    HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream("c:/input.xls"));
    HSSFSheet sheet = workbook.getSheet("Sheet1");
    copyRow(workbook, sheet, 0, 1);
    FileOutputStream out = new FileOutputStream("c:/output.xls");
    workbook.write(out);
    out.close();
}

private static void copyRow(HSSFWorkbook workbook, HSSFSheet worksheet, int sourceRowNum, int destinationRowNum) {
    // Get the source / new row
    HSSFRow newRow = worksheet.getRow(destinationRowNum);
    HSSFRow sourceRow = worksheet.getRow(sourceRowNum);

    // If the row exist in destination, push down all rows by 1 else create a new row
    if (newRow != null) {
        worksheet.shiftRows(destinationRowNum, worksheet.getLastRowNum(), 1);
    } else {
        newRow = worksheet.createRow(destinationRowNum);
    }

    // Loop through source columns to add to new row
    for (int i = 0; i < sourceRow.getLastCellNum(); i++) {
        // Grab a copy of the old/new cell
        HSSFCell oldCell = sourceRow.getCell(i);
        HSSFCell newCell = newRow.createCell(i);

        // If the old cell is null jump to next cell
        if (oldCell == null) {
            newCell = null;
            continue;
        }

        // Copy style from old cell and apply to new cell
        HSSFCellStyle newCellStyle = workbook.createCellStyle();
        newCellStyle.cloneStyleFrom(oldCell.getCellStyle());
        ;
        newCell.setCellStyle(newCellStyle);

        // If there is a cell comment, copy
        if (oldCell.getCellComment() != null) {
            newCell.setCellComment(oldCell.getCellComment());
        }

        // If there is a cell hyperlink, copy
        if (oldCell.getHyperlink() != null) {
            newCell.setHyperlink(oldCell.getHyperlink());
        }

        // Set the cell data type
        newCell.setCellType(oldCell.getCellType());

        // Set the cell data value
        switch (oldCell.getCellType()) {
            case Cell.CELL_TYPE_BLANK:
                newCell.setCellValue(oldCell.getStringCellValue());
                break;
            case Cell.CELL_TYPE_BOOLEAN:
                newCell.setCellValue(oldCell.getBooleanCellValue());
                break;
            case Cell.CELL_TYPE_ERROR:
                newCell.setCellErrorValue(oldCell.getErrorCellValue());
                break;
            case Cell.CELL_TYPE_FORMULA:
                newCell.setCellFormula(oldCell.getCellFormula());
                break;
            case Cell.CELL_TYPE_NUMERIC:
                newCell.setCellValue(oldCell.getNumericCellValue());
                break;
            case Cell.CELL_TYPE_STRING:
                newCell.setCellValue(oldCell.getRichStringCellValue());
                break;
        }
    }
}

Answer 1

只需修改copyRow方法，添加参数，HSSFSheet resultSheet然后修改newRow的方法变量获得，从resultSheet这样的

private static void copyRow(HSSFWorkbook workbook, HSSFSheet worksheet, HSSFSheet resultSheet, int sourceRowNum, int destinationRowNum) {
    // Get the source / new row
    HSSFRow newRow = resultSheet.getRow(destinationRowNum);
    HSSFRow sourceRow = worksheet.getRow(sourceRowNum);

从目的地“ output.xls”获取该resultSheet