在Java SWT GUI中显示Excel文件的内容

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;

import org.eclipse.swt.SWT;
import import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class ExcelViewer {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());

        Table table = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
        table.setHeaderVisible(true);
        table.setLinesVisible(true);

        // 选择Excel文件
        FileDialog fileDialog = new FileDialog(shell, SWT.OPEN);
        fileDialog.setFilterExtensions(new String[] { "*.xls", "*.xlsx" });
        String filePath = fileDialog.open();

        // 读取Excel文件内容
        try (FileInputStream fis = new FileInputStream(filePath);
             Workbook workbook = new HSSFWorkbook(fis)) {
            Sheet sheet = workbook.getSheetAt(0);

            // 创建表头
            Row headerRow = sheet.getRow(0);
            for (int i = 0; i < headerRow.getLastCellNum(); i++) {
                TableColumn column = new TableColumn(table, SWT.NONE);
                column.setText(headerRow.getCell(i).getStringCellValue());
            }

            // 添加行和单元格数据
            for (int i = 1; i <= sheet.getLastRowNum(); i++) {
                Row row = sheet.getRow(i);
                TableItem item = new TableItem(table, SWT.NONE);

                for (int j = 0; j < row.getLastCellNum(); j++) {
                    Cell cell = row.getCell(j);
                    item.setText(j, cell.getStringCellValue());
                }
            }

            // 调整列宽
            for (TableColumn column : table.getColumns()) {
                column.pack();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        shell.pack();
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }

        display.dispose();
    }
}