如何使用apache poi刪除一行

Question

我試圖刪除第三行

這是我根據rgettman，Leo，zibi的評論編寫的。 謝謝。

public class MainTest {

    public static void main(String[] args) throws IOException {

        FileInputStream file  =   new FileInputStream(new  File("test.xlsx") );
        XSSFWorkbook wb = new XSSFWorkbook(file);
        XSSFSheet sheet = wb.getSheetAt(0);
        sheet.removeRow(sheet.getRow(3));
//      sheet.shiftRows(3, 3, -1);

        File outWB = new File("testResult.xlsx");
        OutputStream out = new FileOutputStream(outWB);
        wb.write(out);
        out.flush();
        out.close();


        System.exit(0);
    }

}

但是這會刪除一行中的值，但不會刪除該行

Answer 1

如果您正在使用XLS文件（而不是XLSX），那么您應該使用HSSFWorkbook。 我剛剛測試了下面的解決方案，一切正常：

    File file = new File(....);
    FileInputStream fis = new FileInputStream(file);
    HSSFWorkbook wb = new HSSFWorkbook(fis);
    HSSFSheet sheet = wb.getSheetAt(0);

    sheet.shiftRows(3, 3, -1);

    File outWB = new File(.....);
    OutputStream out = new FileOutputStream(outWB);
    wb.write(out);
    out.flush();
    out.close();

甚至可以使用Workbook工廠，它可以為您識別類型：

    Workbook wb = WorkbookFactory.create(file);
    Sheet sheet = wb.getSheetAt(0);
    sheet.shiftRows(3, 3, -1);

在下面你可以找到一個刪除行的函數，它可以在xls和xlsx中使用（測試;））。

Workbook wb = WorkbookFactory.create(file);
Sheet sheet = wb.getSheetAt(0);
removeRow(sheet, 2);
File outWB = new File(...);
OutputStream out = new FileOutputStream(outWB);
wb.write(out);
out.flush();
out.close();


public static void removeRow(Sheet sheet, int rowIndex) {
    int lastRowNum = sheet.getLastRowNum();
    if (rowIndex >= 0 && rowIndex < lastRowNum) {
        sheet.shiftRows(rowIndex + 1, lastRowNum, -1);
    }
    if (rowIndex == lastRowNum) {
        Row removingRow = sheet.getRow(rowIndex);
        if (removingRow != null) {
            sheet.removeRow(removingRow);
        }
    }
}

Answer 2

查看Shift行的定義：

Shifts rows between startRow and endRow n number of rows. If you use a negative number, it will shift rows up. Code ensures that rows don't wrap around. Calls shiftRows(startRow, endRow, n, false, false); Additionally shifts merged regions that are completely defined in these rows (ie. merged 2 cells on a row to be shifted).

Specified by: shiftRows(...) in Sheet
Parameters:
    startRow the row to start shifting
    endRow the row to end shifting
    n the number of rows to shift

所以為了刪除第3行，你需要使用startRow = 3 （基於零的索引，所以基本上它是第四行）， endRow = sheet.getLastRowNum()和n = -1來移動選定的行，即從第4行到最后一行向上排1行。

Answer 3

嘗試更好的特殊功能removeRow

此外，XSSFWorkbook使用.xlsx擴展名。