我需要追加excel。我写代码：

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.sql.ResultSet;

import java.sql.Statement;

import org.apache.poi.EncryptedDocumentException;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.Row;

import org.apache.poi.ss.usermodel.Sheet;

import org.apache.poi.ss.usermodel.Workbook;

import org.apache.poi.ss.usermodel.WorkbookFactory;

import javafx.collections.FXCollections;

import javafx.collections.ObservableList;

public class AppendExcel {

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

String excelFilePath = "append.xlsx";

try {

FileInputStream inputStream = new FileInputStream(new File(excelFilePath));

Workbook workbook = WorkbookFactory.create(inputStream);

Sheet sheet = workbook.getSheetAt(0);

DbManagerSQL test = new DbManagerSQL();

String sql = "select distinct Code,Item,Description from MyTable";

Statement stmt = test.dbConnect().createStatement();

ResultSet rs = stmt.executeQuery(sql);

int rowCount = sheet.getLastRowNum();

while (rs.next()) {

Row row = sheet.createRow(++rowCount);

int columnCount = 0;

Cell cell = row.createCell(columnCount);

cell.setCellValue(rowCount);

cell = row.createCell(++columnCount);

cell.setCellValue((String) rs.getString(1));

cell.setCellValue((String) rs.getString(2));

cell.setCellValue((String) rs.getString(3));

}

inputStream.close();

FileOutputStream outputStream = new FileOutputStream("append.xlsx");

workbook.write(outputStream);

// workbook.close();

outputStream.close();

} catch (IOException | EncryptedDocumentException | InvalidFormatException ex) {

ex.printStackTrace();

}

}

}我的Excel有专栏

但是当我追加Excel时，我得到了下一个

它看起来像只记得最后一列。我认为这个箴言是在这行代码中

cell = row.createCell(++ columnCount);

但我现在不知道如何添加数据来获得像这样的excel

任何想法？？？