javafxx实现学生信息管理系统

JavaFX是Java平台的一个GUI库，可以用来构建跨平台的桌面应用程序。学生信息管理系统是一个常见的应用程序，可以使用JavaFX来实现。

下面是一个简单的JavaFX学生信息管理系统的实现示例，包括添加学生信息、修改学生信息、删除学生信息和显示学生信息等功能：

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class StudentManagementSystem extends Application {
    private ObservableList<Student> students = FXCollections.observableArrayList();

    private TextField idField = new TextField();
    private TextField nameField = new TextField();
    private TextField ageField = new TextField();
    private ComboBox<String> genderCombo = new ComboBox<>();
    private TextField majorField = new TextField();

    private ListView<Student> studentListView = new ListView<>();
    private Button addButton = new Button("添加");
    private Button editButton = new Button("修改");
    private Button deleteButton = new Button("删除");

    @Override
    public void start(Stage primaryStage) {
        GridPane inputPane = new GridPane();
        inputPane.setAlignment(Pos.CENTER);
        inputPane.setHgap(10);
        inputPane.setVgap(10);
        inputPane.setPadding(new Insets(10));

        inputPane.add(new Label("学号"), 0, 0);
        inputPane.add(idField, 1, 0);
        inputPane.add(new Label("姓名"), 0, 1);
        inputPane.add(nameField, 1, 1);
        inputPane.add(new Label("年龄"), 0, 2);
        inputPane.add(ageField, 1, 2);
        inputPane.add(new Label("性别"), 0, 3);
        genderCombo.getItems().addAll("男", "女");
        inputPane.add(genderCombo, 1, 3);
        inputPane.add(new Label("专业"), 0, 4);
        inputPane.add(majorField, 1, 4);

        VBox leftPane = new VBox();
        leftPane.setSpacing(10);
        leftPane.setPadding(new Insets(10));
        leftPane.getChildren().addAll(inputPane, addButton, editButton, deleteButton);

        HBox rightPane = new HBox();
        rightPane.getChildren().add(studentListView);

        HBox mainPane = new HBox();
        mainPane.setSpacing(10);
        mainPane.setPadding(new Insets(10));
        mainPane.getChildren().addAll(leftPane, rightPane);

        Scene scene = new Scene(mainPane, 600, 400);
        primaryStage.setTitle("学生信息管理系统");
        primaryStage.setScene(scene);
        primaryStage.show();

        addButton.setOnAction(event -> addStudent());
        editButton.setOnAction(event -> editStudent());
        deleteButton.setOnAction(event -> deleteStudent());
        studentListView.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) -> showStudent(newValue));
    }

    private void addStudent() {
        String id = idField.getText();
        String name = nameField.getText();
        int age = Integer.parseInt(ageField.getText());
        String gender = genderCombo.getValue();
        String major = majorField.getText();
        Student student = new Student(id, name, age, gender, major);
        students.add(student);
        clearInputFields();
    }

    private void editStudent() {
        Student student = studentListView.getSelectionModel().getSelectedItem();
        if (student == null) {
            return;
        }
        String id = idField.getText();
        String name = nameField.getText();
        int age = Integer.parseInt(ageField.getText());
        String gender = genderCombo.getValue();
        String major = majorField.getText();
        student.setId(id);
        student.setName(name);
        student.setAge(age);
        student.setGender(gender);
        student.setMajor(major);
        clearInputFields();
    }

    private void deleteStudent() {
        Student student = studentListView.getSelectionModel().getSelectedItem();
        if (student != null) {
            students.remove(student);
        }
    }

    private void showStudent(Student student) {
        if (student != null) {
            idField.setText(student.getId());
            nameField.setText(student.getName());
            ageField.setText(String.valueOf(student.getAge()));
            genderCombo.setValue(student.getGender());
            majorField.setText(student.getMajor());
        }
    }

    private void clearInputFields() {
        idField.setText("");
        nameField.setText("");
        ageField.setText("");
        genderCombo.setValue("");
        majorField.setText("");
    }

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

class Student {
    private String id;
    private String name;
    private int age;
    private String gender;
    private String major;

    public Student(String id, String name, int age, String gender, String major) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.major = major;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getMajor() {
        return major;
    }

    public void setMajor(String major) {
        this.major = major;
    }

    @Override
    public String toString() {
        return name + " (" + id + ")";
    }
}

在这个实现中，我们使用了JavaFX的ListView、TextField、ComboBox、Button等控件来实现学生信息管理系统的添加、修改、删除和显示等功能。同时，我们还使用了ObservableList来存储学生信息，这样当学生信息发生变化时，界面上的学生列表会自动更新。