如何以编程方式从eclipse插件调用importwizard

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.ImportWizard;
import org.eclipse.ui.wizards.datatransfer.FileSystemImportWizard;

public class ImportWizardCaller {
    public void callImportWizard() {
        // 获取当前工作空间中的项目
        IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();

        // 创建Import Wizard实例
        ImportWizard wizard = new FileSystemImportWizard();

        // 设置导入的目标项目
        wizard.init(PlatformUI.getWorkbench(), new StructuredSelection(projects));

        // 打开Import Wizard对话框
        wizard.setWindowTitle("Import");
        wizard.setForcePreviousAndNextButtons(true);
        wizard.setNeedsProgressMonitor(true);
        wizard.setContainerMode(true);
        wizard.setImportProject(true);

        // 执行导入操作
        wizard.performFinish();
    }
}

<extension point="org.eclipse.ui.commands">
    <command
        id="com.example.callImportWizardCommand"
        name="Call Import Wizard">
    </command>
</extension>

<extension point="org.eclipse.ui.handlers">
    <handler
        class="com.example.CallImportWizardHandler"
        commandId="com.example.callImportWizardCommand">
    </handler>
</extension>

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.handlers.HandlerUtil;

public class CallImportWizardHandler extends AbstractHandler {
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        ImportWizardCaller caller = new ImportWizardCaller();
        caller.callImportWizard();

        // 可选：显示一个对话框来确认导入操作已完成
        MessageDialog.openInformation(
                HandlerUtil.getActiveShell(event),
                "Import Wizard",
                "Import operation completed successfully.");

        return null;
    }
}

<extension point="org.eclipse.ui.menus">
    <menuContribution locationURI="toolbar:org.eclipse.ui.main.toolbar">
        <toolbar
            id="com.example.callImportWizardToolbar"
            label="Call Import Wizard">
            <command
                commandId="com.example.callImportWizardCommand"
                icon="icons/import_wizard.png"
                tooltip="Call Import Wizard">
            </command>
        </toolbar>
    </menuContribution>
</extension>