阶段项目

一、登录

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.Background;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class JavaFx13GridPaneLogin extends Application {
    @Override
    public void start(Stage stage) throws Exception {
        stage.setTitle("登录");
        GridPane gridPane = new GridPane();
//        gridPane.setGridLinesVisible(true);
        gridPane.setAlignment(Pos.CENTER);
        //gridPane.setBackground(Background.fill(Color.RED));
        gridPane.setVgap(10);
        Text text = new Text("欢迎登录");
        text.setFont(Font.font("宋体", FontWeight.NORMAL,20));
        gridPane.add(text,0,0,2,1);
        Label userName = new Label("用户名：");
        gridPane.add(userName,0,1);
        TextField userNameField = new TextField();
        gridPane.add(userNameField,1,1);
        Label password = new Label("密码：");
        gridPane.add(password,0,2);
        PasswordField passwordField = new PasswordField();
        gridPane.add(passwordField,1,2);
        Button saveButton = new Button("保存");
        saveButton.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                String un = userNameField.getText();
                String pwd = passwordField.getText();
                if("admin".equals(un) && "123".equals(pwd)){
                    Alert alert = new Alert(Alert.AlertType.INFORMATION);
                    alert.setTitle("成功");
                    alert.setHeaderText("登录成功！");
                    alert.setContentText("登录失败！");
                    alert.showAndWait();
                }else{
                    Alert alert = new Alert(Alert.AlertType.WARNING);
                    alert.setTitle("警告");
                    alert.setHeaderText("用户账号密码错误！");
                    alert.setContentText("请重新填写！");
                    alert.showAndWait();
                }
            }
        });
        HBox hBox = new HBox();
        hBox.getChildren().add(saveButton);
        hBox.setAlignment(Pos.BOTTOM_CENTER);
        gridPane.add(hBox,1,3);
        Scene scene = new Scene(gridPane,600,500);
        stage.setScene(scene);
        stage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}