Javafx编写学生管理系统程序

好的，以下是一个简单的基于JavaFX的学生管理系统程序示例：

首先，我们需要设计用户界面。在这个示例中，我们将使用一个表格视图来显示学生的信息，并且添加按钮来实现增加、修改和删除学生信息的功能。

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class StudentManagementSystem extends Application {

    private TableView<Student> tableView = new TableView<>();
    private ObservableList<Student> students = FXCollections.observableArrayList(
            new Student("001", "张三", "男", "计算机科学与技术"),
            new Student("002", "李四", "女", "软件工程")
    );

    @Override
    public void start(Stage primaryStage) throws Exception {
        // 初始化表格视图
        tableView.setEditable(true);
        TableColumn<Student, String> idColumn = new TableColumn<>("学号");
        idColumn.setCellValueFactory(new PropertyValueFactory<>("id"));
        TableColumn<Student, String> nameColumn = new TableColumn<>("姓名");
        nameColumn.setCellValueFactory(new PropertyValueFactory<>("name"));
        TableColumn<Student, String> genderColumn = new TableColumn<>("性别");
        genderColumn.setCellValueFactory(new PropertyValueFactory<>("gender"));
        TableColumn<Student, String> majorColumn = new TableColumn<>("专业");
        majorColumn.setCellValueFactory(new PropertyValueFactory<>("major"));
        tableView.getColumns().addAll(idColumn, nameColumn, genderColumn, majorColumn);
        tableView.setItems(students);

        // 添加按钮
        Button addButton = new Button("添加");
        addButton.setOnAction(event -> {
            Student student = new Student();
            boolean result = showStudentDialog(student, "添加学生信息");
            if (result) {
                students.add(student);
            }
        });
        Button modifyButton = new Button("修改");
        modifyButton.setOnAction(event -> {
            Student student = tableView.getSelectionModel().getSelectedItem();
            if (student != null) {
                boolean result = showStudentDialog(student, "修改学生信息");
                if (result) {
                    tableView.refresh();
                }
            }
        });
        Button deleteButton = new Button("删除");
        deleteButton.setOnAction(event -> {
            Student student = tableView.getSelectionModel().getSelectedItem();
            if (student != null) {
                students.remove(student);
            }
        });

        // 添加布局
        BorderPane borderPane = new BorderPane();
        HBox buttonBox = new HBox(10, addButton, modifyButton, deleteButton);
        borderPane.setTop(buttonBox);
        borderPane.setCenter(tableView);
        borderPane.setPadding(new Insets(10));

        // 显示界面
        Scene scene = new Scene(borderPane, 600, 400);
        primaryStage.setScene(scene);
        primaryStage.setTitle("学生管理系统");
        primaryStage.show();
    }

    private boolean showStudentDialog(Student student, String title) {
        // 创建对话框
        Dialog<Student> dialog = new Dialog<>();
        dialog.setTitle(title);
        dialog.setHeaderText(null);

        // 添加控件
        Label idLabel = new Label("学号：");
        TextField idField = new TextField(student.getId());
        Label nameLabel = new Label("姓名：");
        TextField nameField = new TextField(student.getName());
        Label genderLabel = new Label("性别：");
        ComboBox<String> genderComboBox = new ComboBox<>();
        genderComboBox.getItems().addAll("男", "女");
        genderComboBox.setValue(student.getGender());
        Label majorLabel = new Label("专业：");
        TextField majorField = new TextField(student.getMajor());
        GridPane gridPane = new GridPane();
        gridPane.setHgap(10);
        gridPane.setVgap(10);
        gridPane.add(idLabel, 0, 0);
        gridPane.add(idField, 1, 0);
        gridPane.add(nameLabel, 0, 1);
        gridPane.add(nameField, 1, 1);
        gridPane.add(genderLabel, 0, 2);
        gridPane.add(genderComboBox, 1, 2);
        gridPane.add(majorLabel, 0, 3);
        gridPane.add(majorField, 1, 3);
        dialog.getDialogPane().setContent(gridPane);

        // 添加按钮
        ButtonType okButtonType = new ButtonType("确定", ButtonBar.ButtonData.OK_DONE);
        ButtonType cancelButtonType = new ButtonType("取消", ButtonBar.ButtonData.CANCEL_CLOSE);
        dialog.getDialogPane().getButtonTypes().addAll(okButtonType, cancelButtonType);

        // 处理结果
        dialog.setResultConverter(buttonType -> {
            if (buttonType == okButtonType) {
                student.setId(idField.getText());
                student.setName(nameField.getText());
                student.setGender(genderComboBox.getValue());
                student.setMajor(majorField.getText());
                return student;
            } else {
                return null;
            }
        });

        // 显示对话框
        dialog.showAndWait();
        return dialog.getResult() != null;
    }

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

在这个示例中，我们定义了一个`Student`类来表示学生信息，包括学号、姓名、性别和专业。然后，我们创建了一个表格视图来显示学生的信息，并且添加了三个按钮来实现增加、修改和删除学生信息的功能。我们还使用`Dialog`对话框来实现学生信息的添加和修改。

当你运行这个程序时，你将看到一个简单的学生管理系统界面，你可以在表格视图中添加、修改和删除学生信息。这只是一个简单的示例，你可以根据自己的需求进一步扩展和完善这个程序。