如何将JavaFX表单中的多条信息保存到文件中

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class FormSaveToFileExample extends Application {

    private List<FormInfo> formInfos = new ArrayList<>();

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Form Save to File Example");

        GridPane grid = new GridPane();
        grid.setPadding(new Insets(10, 10, 10, 10));
        grid.setVgap(5);
        grid.setHgap(5);

        // Create input fields
        Label nameLabel = new Label("Name:");
        TextField nameField = new TextField();
        grid.add(nameLabel, 0, 0);
        grid.add(nameField, 1, 0);

        Label emailLabel = new Label("Email:");
        TextField emailField = new TextField();
        grid.add(emailLabel, 0, 1);
        grid.add(emailField, 1, 1);

        Label messageLabel = new Label("Message:");
        TextArea messageArea = new TextArea();
        grid.add(messageLabel, 0, 2);
        grid.add(messageArea, 1, 2);

        // Create save button
        Button saveButton = new Button("Save");
        grid.add(saveButton, 1, 3);

        saveButton.setOnAction(event -> {
            // Get form information
            String name = nameField.getText();
            String email = emailField.getText();
            String message = messageArea.getText();

            // Create a new FormInfo object
            FormInfo formInfo = new FormInfo(name, email, message);

            // Add the formInfo to the list
            formInfos.add(formInfo);

            // Save the formInfos to file
            saveFormInfosToFile();
        });

        Scene scene = new Scene(grid, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void saveFormInfosToFile() {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter("form_infos.txt"))) {
            for (FormInfo formInfo : formInfos) {
                writer.write(formInfo.getName() + "," + formInfo.getEmail() + "," + formInfo.getMessage());
                writer.newLine();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static class FormInfo {
        private String name;
        private String email;
        private String message;

        public FormInfo(String name, String email, String message) {
            this.name = name;
            this.email = email;
            this.message = message;
        }

        public String getName() {
            return name;
        }

        public String getEmail() {
            return email;
        }

        public String getMessage() {
            return message;
        }
    }
}