如何使用LibreOffice Java API获得公式的结果？

import com.sun.star.comp.helper.BootstrapSocketConnector;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XMultiComponentFactory;
import com.sun.star.sheet.XCell;
import com.sun.star.sheet.XSpreadsheet;
import com.sun.star.sheet.XSpreadsheets;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.XComponentContext;

public class LibreOfficeFormula {
    public static void main(String[] args) {
        try {
            // 创建LibreOffice服务实例
            XComponentContext context = BootstrapSocketConnector.bootstrap();
            XMultiComponentFactory serviceManager = context.getServiceManager();
            Object desktop = serviceManager.createInstanceWithContext(
                "com.sun.star.frame.Desktop", context);
                
            // 加载文档
            XComponent document = UnoRuntime.queryInterface(
                XComponent.class, desktop).loadComponentFromURL(
                "file:///path/to/document.odt", "_blank", 0, new PropertyValue[0]);
                
            // 访问文档的电子表格
            XSpreadsheets spreadsheets = UnoRuntime.queryInterface(
                XSpreadsheets.class, document);
            XSpreadsheet sheet = UnoRuntime.queryInterface(
                XSpreadsheet.class, spreadsheets.getByName("Sheet1"));
                
            // 访问电子表格的单元格
            XCell cell = UnoRuntime.queryInterface(
                XCell.class, sheet.getCellRangeByName("A1"));
                
            // 获取单元格的公式
            String formula = cell.getFormula();
            System.out.println("Formula: " + formula);
            
            // 计算公式的结果
            Object result = cell.getFormulaResult();
            System.out.println("Result: " + result.toString());
            
            // 处理结果
            // ...
            
            // 关闭文档
            document.dispose();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}