图片

Image可以用来加载多种渠道的图片。

支持bmp、jpg、gif、png图片格式。

定义Image：

Image image = new Image(URL);

其中，URL可以指向网络图片、资源图片或本地图片。示例：

Java制作电子相册新技能

网络图片

网络图片是指存储在服务器上，可通过网络访问的图片资源。网络图片通常遵循http或https协议。例如：

Image image = new Image("https://pic.netbian.com/uploads/allimg/211108/234818-1636386498b2ad.jpg");

本地图片

本地图片是指存储在本地的图片资源。本地图片需遵循file协议。例如：

Image image = new Image("file:C://SunShangXiang.jpg");

可改写为：

File file = new File("C://SunShangXiang.jpg");
String uri = file.toURI().toString();
Image image = new Image(uri);

资源图片

URL url = ImageApplication.class.getResource("/images/logo.png");Image image = new Image(url.toURI().toString());

完整邀请码代码

package io.weijunfu.javafx;import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;import java.io.File;
import java.net.URL;public class ImageApplication extends Application {@Overridepublic void start(Stage stage) throws Exception {BorderPane pane = new BorderPane();// image 用于加载图片//        来自网络图片
//        Image image = new Image("https://pic.netbian.com/uploads/allimg/211108/234818-1636386498b2ad.jpg");//        来自本地图片
//        Image image = new Image("file:C://SunShangXiang.jpg");//        File file = new File("C://SunShangXiang.jpg");
//        String uri = file.toURI().toString();
//        Image image = new Image(uri);//        来自资源文件URL url = ImageApplication.class.getResource("/images/logo.png");Image image = new Image(url.toURI().toString());double width = image.getWidth();double height = image.getHeight();// imageView 用于显示图片ImageView imageView = new ImageView();imageView.setImage(image);pane.setCenter(imageView);// 创建场景Scene scene = new Scene(pane, width, height);// 给舞台添加场景stage.setScene(scene);// 设置窗口标题stage.setTitle("图片展示");// 显示舞台stage.show();}public static void main(String[] args) {launch(args);}
}

电子相册

Java制作电子相册新技能

获取图片存储目录

        URL url = AlbumApplication.class.getResource("/images/album");  // 图片存储目录File file = new File(url.toURI());if(file.exists() && file.isDirectory()) {files = file.listFiles(new FilenameFilter() {@Overridepublic boolean accept(File dir, String name) {int index = name.lastIndexOf(".");String suffix = name.substring(index).toLowerCase(Locale.ROOT);switch (suffix) {   // 仅获取jpg和png格式的图片case ".jpg":case ".png":return true;}return false;}});if(files.length > 0) { // 默认显示第一张照片Image image = new Image(files[currentIndex].getAbsolutePath());imageView.setImage(image);}}

上一张 & 下一张

// 上一张
private void prevPhone() {currentIndex--;currentIndex = currentIndex < 0 ? files.length-1 : currentIndex;imageView.setImage(new Image(files[currentIndex].getAbsolutePath()));
}

// 下一张
private void nextPhone() {currentIndex++;currentIndex = currentIndex >= files.length ? 0 : currentIndex;imageView.setImage(new Image(files[currentIndex].getAbsolutePath()));
}

完整代码

package io.weijunfu.javafx;import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;import java.io.File;
import java.io.FilenameFilter;
import java.net.URL;
import java.util.Arrays;
import java.util.Locale;/*** 电子相册** @Author: weijunfu<ijunfu@163.com>* @Date: 2021-11-11 22:29* @Version: 1.0.0*/
public class AlbumApplication extends Application {private final static double width = 320;private final static double height = 240;private Integer currentIndex = 0;private File[] files;private ImageView imageView = new ImageView();@Overridepublic void start(Stage stage) throws Exception {AnchorPane pane = new AnchorPane();//        ImageView imageView = new ImageView();imageView.setFitWidth(width);imageView.setFitHeight(height);imageView.setX(0);imageView.setY(0);pane.getChildren().add(imageView);URL url = AlbumApplication.class.getResource("/images/album");  // 图片存储目录File file = new File(url.toURI());if(file.exists() && file.isDirectory()) {files = file.listFiles(new FilenameFilter() {@Overridepublic boolean accept(File dir, String name) {int index = name.lastIndexOf(".");String suffix = name.substring(index).toLowerCase(Locale.ROOT);switch (suffix) {   // 仅获取jpg和png格式的图片case ".jpg":case ".png":return true;}return false;}});if(files.length > 0) { // 默认显示第一张照片Image image = new Image(files[currentIndex].getAbsolutePath());imageView.setImage(image);}}Label leftLabel = new Label("<");leftLabel.setLayoutX(0);leftLabel.setLayoutY(0);leftLabel.setPrefWidth(50);leftLabel.setPrefHeight(height);leftLabel.setStyle("-fx-background-color: purple; ");leftLabel.setOpacity(0.2);leftLabel.setOnMouseClicked(keyEvent -> {prevPhone();});//        pane.getChildren().add(leftLabel);Label rightLabel = new Label(">");rightLabel.setLayoutX(width-50);rightLabel.setLayoutY(0);rightLabel.setPrefWidth(50);rightLabel.setPrefHeight(height);rightLabel.setStyle("-fx-background-color: purple; ");rightLabel.setOpacity(0.2);rightLabel.setOnMouseClicked(keyEvent -> {nextPhone();});//        pane.setRight(rightLabel);pane.getChildren().addAll(leftLabel, rightLabel);Scene scene = new Scene(pane, width, height);stage.setScene(scene);stage.setTitle("电子相册");stage.show();}/*** 上一张照片* @Author: weijunfu<ijunfu@163.com>* @Version: 1.0.0* @Date: 2021/11/12 1:03* @param* @Return: void*/private void prevPhone() {currentIndex--;currentIndex = currentIndex < 0 ? files.length-1 : currentIndex;imageView.setImage(new Image(files[currentIndex].getAbsolutePath()));}/*** 下一张照片* @Author: weijunfu<ijunfu@163.com>* @Version: 1.0.0* @Date: 2021/11/12 1:02* @param * @Return: void*/private void nextPhone() {currentIndex++;currentIndex = currentIndex >= files.length ? 0 : currentIndex;imageView.setImage(new Image(files[currentIndex].getAbsolutePath()));}public static void main(String[] args) {launch(args);}
}