Javafx查询功能代码

以下是一个简单的JavaFX查询功能代码示例：

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.stage.Stage;

public class QueryFunctionality extends Application {

    private ObservableList<String> data = FXCollections.observableArrayList(
            "John Doe", "Jane Doe", "Bob Smith", "Mary Johnson");

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Query Functionality");

        // Create the grid pane
        GridPane gridPane = new GridPane();
        gridPane.setAlignment(Pos.CENTER);
        gridPane.setHgap(10);
        gridPane.setVgap(10);
        gridPane.setPadding(new Insets(25, 25, 25, 25));

        // Create the label and text field for the query
        Label queryLabel = new Label("Query:");
        gridPane.add(queryLabel, 0, 0);
        TextField queryTextField = new TextField();
        gridPane.add(queryTextField, 1, 0);

        // Create the search button
        Button searchButton = new Button("Search");
        gridPane.add(searchButton, 2, 0);
        searchButton.setOnAction(event -> {
            String query = queryTextField.getText();
            if (!query.isEmpty()) {
                ObservableList<String> results = FXCollections.observableArrayList();
                for (String item : data) {
                    if (item.contains(query)) {
                        results.add(item);
                    }
                }
                if (!results.isEmpty()) {
                    ListView<String> resultsListView = new ListView<>(results);
                    Scene resultsScene = new Scene(resultsListView, 300, 200);
                    Stage resultsStage = new Stage();
                    resultsStage.setScene(resultsScene);
                    resultsStage.setTitle("Results");
                    resultsStage.show();
                } else {
                    Alert alert = new Alert(Alert.AlertType.INFORMATION);
                    alert.setTitle("No Results");
                    alert.setHeaderText(null);
                    alert.setContentText("No results found.");
                    alert.showAndWait();
                }
            }
        });

        // Create the list view for the data
        ListView<String> dataListView = new ListView<>(data);
        gridPane.add(dataListView, 0, 1, 3, 1);

        // Create the scene
        Scene scene = new Scene(gridPane, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

此代码创建了一个包含查询功能的JavaFX应用程序。用户可以在文本框中输入查询，并单击“Search”按钮。如果找到匹配项，则会显示包含结果的列表视图。如果没有找到匹配项，则会显示信息提示框。在此示例中，数据列表硬编码为字符串列表，但您可以将其替换为从数据库或其他数据源检索数据的代码。