JavaFx在Main中获取Controller初始化相关配置和Fxml

Main中的方法

package sample;

import javafx.application.Application;

import javafx.fxml.FXMLLoader;

import javafx.scene.Parent;

import javafx.scene.Scene;

import javafx.stage.Stage;

import java.net.URL;

import javafx.fxml.JavaFXBuilderFactory;

public class Main extends Application {

    @Override

    public void start(Stage primaryStage) throws Exception {

        URL location = getClass().getResource("sample.fxml");

        FXMLLoader fxmlLoader = new FXMLLoader();

        fxmlLoader.setLocation(location);

        fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());

        Parent root = fxmlLoader.load();

        //如果使用 Parent root = FXMLLoader.load(...) 静态读取方法，无法获取到Controller的实例对象

        primaryStage.setTitle("Hello World");

        Scene scene = new Scene(root, 400, 500);

        //加载css样式

        //scene.getStylesheets().add(getClass().getResource("style1.css").toExternalForm());

        primaryStage.setScene(scene);

        Controller controller = fxmlLoader.getController();   //获取Controller的实例对象

        //Controller中写的初始化方法

        controller.Init();

        primaryStage.show();

    }

    public static void main(String[] args) {

        launch(args);

    }

}

Controller类：

package sample;

import javafx.collections.FXCollections;

import javafx.fxml.FXML;

import javafx.scene.control.Button;

import javafx.scene.control.Label;

import javafx.scene.control.ComboBox;

import javafx.event.ActionEvent;

import javafx.collections.ObservableList;

public class Controller {

    @FXML

    private Button mButton;

    @FXML

    private Label mLabel;

    @FXML

    private ComboBox comboBox_API;

    Integer ClickCount=0;

    private ObservableList<String> apiList=FXCollections.observableArrayList();

    public void Init(){

        apiList.add("创建订单");

        apiList.add("获取订单信息");

        this.comboBox_API.setItems(apiList);

        this.mButton.setText("按钮1");

    }

    @FXML

    public void onButtonClick(ActionEvent event) {

        ClickCount++;

        mLabel.setText("HelloWorld"+ClickCount);

    }

}

Fxml文件：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>

<?import javafx.scene.control.Button?>

<?import javafx.scene.control.ComboBox?>

<?import javafx.scene.control.Label?>

<?import javafx.scene.layout.ColumnConstraints?>

<?import javafx.scene.layout.GridPane?>

<?import javafx.scene.layout.RowConstraints?>

<?import javafx.collections.ObservableList?>

<GridPane alignment="center" hgap="10" prefHeight="400.0" prefWidth="500.0" vgap="10" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">

   <columnConstraints>

       <ColumnConstraints prefWidth="60"/>

       <ColumnConstraints prefWidth="60" />

       <ColumnConstraints prefWidth="280"/>

   </columnConstraints>

   <rowConstraints>

       <RowConstraints prefHeight="40"/>

       <RowConstraints prefHeight="200" />

       <RowConstraints prefHeight="40" />

       <RowConstraints prefHeight="200" />

   </rowConstraints>

   <children>

       <Label layoutX="10" layoutY="10" text="API接口" GridPane.columnIndex="0" GridPane.rowIndex="0">

         <GridPane.margin>

            <Insets bottom="10.0" top="5.0" />

         </GridPane.margin>

       </Label>

       <ComboBox fx:id="comboBox_API" prefWidth="120" GridPane.columnIndex="1" GridPane.rowIndex="0">

         <GridPane.margin>

            <Insets bottom="10.0" top="5.0" />

         </GridPane.margin>

       </ComboBox>

      <Button fx:id="mButton" mnemonicParsing="false" onAction="#onButtonClick" text="Button" GridPane.columnIndex="2" GridPane.rowIndex="1" />

      <Label fx:id="mLabel" text="Label" GridPane.columnIndex="2" GridPane.rowIndex="2" />

   </children>

</GridPane>