Eclipse PDE:获取在工作台中打开的外部文件的完整路径

import org.eclipse.core.resources.IFile;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.FileEditorInput;

public class FilePathUtil {
    public static String getCurrentFilePath() {
        IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        if (window != null) {
            IWorkbenchPage page = window.getActivePage();
            if (page != null) {
                IEditorPart editor = page.getActiveEditor();
                if (editor != null) {
                    FileEditorInput fileEditorInput = (FileEditorInput) editor.getEditorInput();
                    IFile file = fileEditorInput.getFile();
                    return file.getLocation().toString();
                }
            }
        }
        return null;
    }
}