一、Java通用导出Javafx Chart图片

Javafx不需要使用Application也能导出图片，使用PlatformImpl.startup方法初始化Javafx的Toolkit。

Javafx API并不是所有机器都支持的，Node导出图片不一定成功。（如：无法初始化Javafx的Toolkit或者安装了Server JRE，则没有办法导出图片）。

 

二、Chart导出图片实例

import com.sun.javafx.application.PlatformImpl;
import java.io.File;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.Scene;
import javafx.scene.SnapshotParameters;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.image.WritableImage;
import javax.imageio.ImageIO;public class LineChartTest {public static void export() {final NumberAxis xAxis = new NumberAxis();final NumberAxis yAxis = new NumberAxis();xAxis.setLabel("Number of Month");//creating the chartfinal LineChart<Number, Number> lineChart= new LineChart<>(xAxis, yAxis);lineChart.setTitle("Stock Monitoring, 2010");//defining a seriesXYChart.Series series = new XYChart.Series();series.setName("My portfolio");//populating the series with dataseries.getData().add(new XYChart.Data(1, 23));series.getData().add(new XYChart.Data(2, 14));series.getData().add(new XYChart.Data(3, 15));series.getData().add(new XYChart.Data(4, 24));series.getData().add(new XYChart.Data(5, 34));series.getData().add(new XYChart.Data(6, 36));series.getData().add(new XYChart.Data(7, 22));series.getData().add(new XYChart.Data(8, 45));series.getData().add(new XYChart.Data(9, 43));series.getData().add(new XYChart.Data(10, 17));series.getData().add(new XYChart.Data(11, 29));series.getData().add(new XYChart.Data(12, 25));lineChart.getData().add(series);//防止坐标刻度不显示lineChart.setAnimated(false);//必须添加到场景，否则图表不绘制Scene scene = new Scene(lineChart, 800, 600);WritableImage writableImage = new WritableImage(800, (int) 600);lineChart.snapshot(new SnapshotParameters(), writableImage);File fileA = new File("./chart.png");try {ImageIO.write(SwingFXUtils.fromFXImage(writableImage, null), "png", fileA);} catch (Exception s) {s.printStackTrace();}}public static void main(String[] args) throws InterruptedException {PlatformImpl.startup(() -> {export();System.err.println("finish");System.exit(0);//退出程序});}
}