使用JavaFx Fxml实现账号密码登录
HelloApplication.java：
package com.example.dr295cmonth7;import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.geometry.Insets;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.ButtonType;
import javafx.stage.Stage;import java.io.IOException;
import java.util.Objects;public class HelloApplication extends Application {//private 私有对象private Stage primaryStage;@Overridepublic void start(Stage stage) throws IOException {//赋值this.primaryStage = stage;FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("table.fxml"));Scene scene = new Scene(fxmlLoader.load(), 0, 0);scene.getStylesheets().add(Objects.requireNonNull(getClass().getResource("assets/styles.css")).toExternalForm());stage.setTitle("DR295C数据采集传输仪");stage.setScene(scene);stage.show();}public static void main(String[] args) {launch();}public void showSuccessDialogAndNavigate() {Alert alert3 = new Alert(Alert.AlertType.INFORMATION);alert3.setTitle("登录成功");alert3.setHeaderText("欢迎登录！");alert3.setContentText("即将跳转至主页面");alert3.showAndWait().ifPresent(response -> {if (response == ButtonType.OK) {//点击确定之后的逻辑} else {// 用户点击了取消按钮或关闭了对话框的处理逻辑System.out.println("用户点击了取消按钮或关闭了对话框");}});}
} 调起其他页面方法
// HelloApplication helloApplication = new HelloApplication();
// helloApplication.showSuccessDialogAndNavigate();
login.fxml:
<?xml version="1.0" encoding="UTF-8"?><?import javafx.scene.layout.*?>
<?import javafx.scene.control.*?><GridPane xmlns:fx="http://javafx.com/fxml"fx:controller="com.example.dr295cmonth7.LoginView" alignment="center" hgap="10" vgap="10"><VBox alignment="CENTER" maxWidth="300.0" prefWidth="300.0" spacing="10.0"><HBox alignment="CENTER" maxWidth="300.0" prefWidth="300.0" spacing="10.0"><Label text="登录" GridPane.columnIndex="0" GridPane.rowIndex="0"/></HBox><HBox alignment="CENTER" maxWidth="300.0" prefWidth="300.0" spacing="10.0"><Label text="账号：" GridPane.columnIndex="0" GridPane.rowIndex="0"/><TextField fx:id="usernameField" GridPane.columnIndex="1" GridPane.rowIndex="0"/></HBox><HBox alignment="CENTER" maxWidth="300.0" prefWidth="300.0" spacing="10.0"><Label text="密码：" GridPane.columnIndex="0" GridPane.rowIndex="1"/><PasswordField fx:id="passwordField" GridPane.columnIndex="1" GridPane.rowIndex="1"/></HBox><Label fx:id="welcomeText" alignment="CENTER" maxWidth="1.7976931348623157E308"style="-fx-text-fill: red;"/><Button text="登录" onAction="#handleLogin" GridPane.columnIndex="1" GridPane.rowIndex="2"/></VBox>
</GridPane>handleLogin.java：
package com.example.dr295cmonth7;import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.stage.Stage;import java.util.Objects;public class LoginView {@FXMLprivate TextField usernameField;@FXMLprivate PasswordField passwordField;@FXMLprivate Label welcomeText;@FXMLprivate Button jumpButton;@FXMLprivate void handleLogin() throws Exception {String usernameValue = usernameField.getText();String passwordValue = passwordField.getText();if (usernameValue.isEmpty() || passwordValue.length() < 6) {Alert alert = new Alert(Alert.AlertType.ERROR);alert.setTitle("提示");alert.setHeaderText("账号和密码不能为空，密码长度至少为 6 位");alert.showAndWait();welcomeText.setText("账号和密码不能为空，密码长度至少为 6 位");return;}if ("admin".equals(usernameValue) && "123456".equals(passwordValue)) {//跳转页面Parent subPage = FXMLLoader.load(Objects.requireNonNull(getClass().getResource("table.fxml")));Scene subPageScene = new Scene(subPage);Stage stage = (Stage) jumpButton.getScene().getWindow();stage.setScene(subPageScene);stage.show();//调起其他页面方法// HelloApplication helloApplication = new HelloApplication();// helloApplication.showSuccessDialogAndNavigate();} else {// 登录失败的提示Alert alert = new Alert(Alert.AlertType.ERROR);alert.setTitle("错误");alert.setHeaderText("账号或密码错误");alert.showAndWait();}}
}使用JavaFx Fxml实现开始结束时间：
首先创建 TimeRange.fxml 文件：
<?xml version="1.0" encoding="UTF-8"?><?import javafx.scene.layout.VBox?>
<?import javafx.scene.control.DatePicker?>
<?import javafx.scene.control.Label?><HBox xmlns:fx="http://javafx.com/fxml/1" spacing="10"><Label text="创建日期"/><DatePicker fx:id="startDatePicker" prefWidth="140.0"/><Label text="-"/><DatePicker fx:id="endDatePicker" prefWidth="140.0"/><Button onAction="#query" text="查询" textFill="WHITE" GridPane.columnIndex="2" GridPane.rowIndex="0" styleClass="button-all-common" />
</HBox>然后创建 TimeRangeController.java 类：
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.fxml.FXML;
import javafx.scene.control.DatePicker;import java.time.LocalDate;public class TimeRangeController {private ObjectProperty startDate = new SimpleObjectProperty();@FXMLprivate DatePicker startDatePicker;private ObjectProperty endDate = new SimpleObjectProperty();@FXMLprivate DatePicker endDatePicker;//以后七天：LocalDate.now().plusDays(7) ;前七天：LocalDate.now().minusDays(7)public TimeRangeController() {// 初始化日期属性 方法一：startDate.set(LocalDate.now().minusDays(7));endDate.set(LocalDate.now());// 初始化日期属性 方法二：
// LocalDate today = LocalDate.now();
// startDate.set(today.minusDays(7));
// endDate.set(today);}@FXMLpublic void initialize() {startDatePicker.valueProperty().bindBidirectional(startDate);endDatePicker.valueProperty().bindBidirectional(endDate);}//查询@FXMLvoid query(ActionEvent event) {System.out.println(startDate.get()); //开始时间System.out.println(endDate.get()); //结束时间}}使用JavaFx Fxml定义各种类型的数据：
字符串 + 整数 ： private StringProperty searchValue = new SimpleStringProperty(); @FXML private TextField searchField;
表格：
@FXML private TableView<User> operateTableView;@FXML private TableColumn<User, String> startTime;@FXML private TableColumn<User, String> endTime;@FXML private TableColumn<User, String> operator;
日期：
private ObjectProperty startDate = new SimpleObjectProperty(); @FXML private DatePicker startDatePicker;
开关
@FXML
private CheckBox booleanCheckBox;
