步骤

1. 先新建一个javafx工程
2. 我比较习惯使用scene builder向Gridpanel中拖入一个矩形，并设置矩形的ID
3. 在start方法中添加如下代码

package sample;import javafx.animation.RotateTransition;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
import javafx.util.Duration;public class Main extends Application {@Overridepublic void start(Stage primaryStage) throws Exception{Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));Rectangle rect = (Rectangle) root.lookup("#rect");//Instantiating RotateTransition classRotateTransition rotate = new RotateTransition();//围绕哪个轴旋转rotate.setAxis(Rotate.Z_AXIS);//旋转多少度rotate.setByAngle(90);//动画执行几次rotate.setCycleCount(1);//动画执行的持续时间rotate.setDuration(Duration.millis(2000));//把矩形加入到动画中rotate.setNode(rect);//开始动画rotate.play();primaryStage.setTitle("Hello World");primaryStage.setScene(new Scene(root, 800, 300));primaryStage.show();}public static void main(String[] args) {launch(args);}
}

参考

https://www.javatpoint.com/javafx-rotate-transition