Java 如何使用ApachePOI将现有excel工作表中的行复制到新的excel工作表？

我想比较两个excel工作表，找出是否有行不同，如果有，我想将与该excel不同的单行复制到新excel中的新行。下面是我从网络上获取的一段代码片段，并尝试过，但问题在于如果我将现有excel的第10行（例如）复制到新excel的第一行，则第一行会正确复制到新excel中，但第一个excel中的所有剩余行也会复制到新excel中。我想问题出在我写新excel的方式上[工作簿.写（出）]请帮忙！！提前谢谢

    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;
        }
    }
}

公共类行复制{
公共静态void main（字符串[]args）引发异常{
HSSFWorkbook=新的HSSFWorkbook（新文件输入流（“c:/input.xls”）；
HSSFSheet sheet=workbook.getSheet（“Sheet1”）；
复制行（工作簿，工作表，0，1）；
FileOutputStream out=新的FileOutputStream（“c:/output.xls”）；
练习册。写（出）；
out.close（）；
}
专用静态无效复制行（HSSF工作簿、HSSF工作表、int sourceRowNum、int destinationRowNum）{
//获取源/新行
HSSFRow newRow=工作表.getRow（destinationRowNum）；
HSSFRow sourceRow=工作表.getRow（sourceRowNum）；
//如果目标中存在该行，请将所有行向下按1，否则创建新行
if（newRow！=null）{
sheet.shiftRows（destinationRowNum，sheet.getLastRowNum（），1）；
}否则{
newRow=工作表.createRow（destinationRowNum）；
}
//循环源列以添加到新行
对于（int i=0；i

只需修改

copyRow

方法，添加参数

HSSFSheet resultSheet

，然后在方法中修改

newRow

变量，以从

resultSheet

中获得该变量，如下所示

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);

---

从您的目标“output.xls”获取该结果表

只需修改

copyRow

方法，添加参数

HSSFSheet resultSheet

，然后在方法中修改

newRow

变量，即可从

resultSheet

获得该结果表，如下所示

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);

---

从您的目标“output.xls”获取结果表

从一张表复制到另一张表

public static void copyFromSourceToDestinationRow(XSSFWorkbook workbook, XSSFSheet sourceWorksheet, int sourceRowNum, XSSFSheet destinationWorksheet, int destinationRowNum) {
        // Get the source / new row
        XSSFRow sourceRow = sourceWorksheet.getRow(sourceRowNum);
        XSSFRow newRow = destinationWorksheet.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
            XSSFCell oldCell = sourceRow.getCell(i);
            XSSFCell newCell = newRow.createCell(i);
            // If the old cell is null jump to next cell
            if (oldCell == null) {
                continue;
            }

            // Copy style from old cell and apply to new cell
            XSSFCellStyle 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.getCellTypeEnum());

            // Set the cell data value
            switch (oldCell.getCellTypeEnum()) {
            case BLANK:// Cell.CELL_TYPE_BLANK:
                newCell.setCellValue(oldCell.getStringCellValue());
                break;
            case BOOLEAN:
                newCell.setCellValue(oldCell.getBooleanCellValue());
                break;
            case FORMULA:
                newCell.setCellFormula(oldCell.getCellFormula());
                break;
            case NUMERIC:
                newCell.setCellValue(oldCell.getNumericCellValue());
                break;
            case STRING:
                newCell.setCellValue(oldCell.getRichStringCellValue());
                break;
            default:
                break;
            }
        }

        // If there are are any merged regions in the source row, copy to new row
        for (int i = 0; i < sourceWorksheet.getNumMergedRegions(); i++) {
            CellRangeAddress cellRangeAddress = sourceWorksheet.getMergedRegion(i);
            if (cellRangeAddress.getFirstRow() == sourceRow.getRowNum()) {
                CellRangeAddress newCellRangeAddress = new CellRangeAddress(newRow.getRowNum(),
                        (newRow.getRowNum() + (cellRangeAddress.getLastRow() - cellRangeAddress.getFirstRow())),
                        cellRangeAddress.getFirstColumn(), cellRangeAddress.getLastColumn());
                destinationWorksheet.addMergedRegion(newCellRangeAddress);
            }
        }
    }

public static void copyFromSourceToDestinationRow（XSSF工作簿、XSSFSheet sourceWorksheet、int-sourceRowNum、XSSFSheet destinationWorksheet、int-destinationRowNum）{
//获取源/新行
XSSFRow sourceRow=sourcesheet.getRow（sourceRowNum）；
XSSFRow newRow=destinationWorksheet.createRow（destinationRowNum）；
//循环源列以添加到新行
对于（int i=0；i