从显示在 JLabel 上的 ImageIcon 获取路径

Question

我正在构建一个 PhotoViewer。我希望能够获取显示在 JLabel 上的 ImageIcon 的路径。因此我创建了一个 MouseListener 和一个 FileChooser。我花了很多时间试图解决这个问题。

for (int i=0; i< scaled.size(); i++){
labels.add(i, new JLabel(new ImageIcon(scaled.get(i))));
}

这里我想给每个正在创建的标签命名为 i，这样我可以稍后使用 getName() 并询问它包含哪个 ImageIcon 的具体标签及其路径。

我有三个 ArrayLists:

ArrayList<JLabel> labels = new ArrayList<JLabel>();

ArrayList<ImageIcon> AL = new ArrayList<ImageIcon>();

ArrayList<Image> scaled = new ArrayList<Image>();

现在 mouseClicked 事件应该给我一个指向标签上已被点击的 ImageIcon 的路径。

public void mouseClicked(MouseEvent arg0) {
        System.out.println(arg0.getSource().getName());
        int a = arg0.getSource().getName();
        getImageIcon.labels.get(a);
        CreateFrame(arg0.getSource().getDescription());
    }

之后，使用所选图片路径的构造参数创建一个框架。我会在单独的框架中显示它。

完整代码：

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Label;
import java.awt.List;
import java.awt.event.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import javax.swing.*;

public class ImageViewer {

    public static void main(String[] args) {

        JFrame frame = new ImageViewerFrame();
        frame.setTitle("Photoviewer");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

}


@SuppressWarnings("serial")
class ImageViewerFrame extends JFrame implements MouseListener{
    JLabel label;
    JFileChooser chooser;
    JMenuBar menubar;
    JMenu menu;
    JMenuItem menuitem;
    JPanel panel = new JPanel();    

    public ArrayList<File> images = new ArrayList <File>();

    public void method1(){
        JLabel test = labels.get(0);
        System.out.println(test.getName());     
    }


    ArrayList<JLabel> labels = new ArrayList<JLabel>();

    ArrayList<ImageIcon> AL = new ArrayList<ImageIcon>();

    ArrayList<Image> scaled = new ArrayList<Image>();

    public ImageViewerFrame() {
        setSize(500,500);
        panel.setLayout(new GridLayout(0,5));
        label = new JLabel();
        add(label);
        add(panel);
        JButton test = new JButton ("TEST");
        test.addMouseListener(this);
        panel.add(test);
        panel.setVisible(true);
        chooser = new JFileChooser();
        chooser.setCurrentDirectory(new File("."));
        chooser.setMultiSelectionEnabled(true);
        menubar = new JMenuBar();
        setJMenuBar(menubar);
        menu = new JMenu("File");
        menubar.add(menu);
        menuitem = new JMenuItem("Open");
        menu.add(menuitem);
        menuitem.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent event){

                        int result = chooser.showOpenDialog(null);

                        if(result == JFileChooser.APPROVE_OPTION) {

                            File[] f = chooser.getSelectedFiles();

                            for(int i=0; i< f.length; i++)
                            {
                                images.add(f[i]);
                                ImageIcon imageicon = new ImageIcon(f[i].toString());
                                AL.add(imageicon);

                            }       

                            for (ImageIcon x : AL){
                                Image image = x.getImage();
                                Image newimg = image.getScaledInstance(120,120, java.awt.Image.SCALE_SMOOTH);
                                scaled.add(newimg);
                            }               

                            for (int i=0; i< scaled.size(); i++){
                                labels.add(i, new JLabel(new ImageIcon(scaled.get(i))));
                            }

                            for (JLabel x : labels){
                                x.addMouseListener(ImageViewerFrame.this);
                            }

                            for (int i=0; i< scaled.size(); i++){
                                //panel.add(new JLabel(i), (new ImageIcon (scaled.get(i))));                        
                                panel.add(labels.get(i));

                            }
                                                                }
                                    }
                            });

    }

    @Override
    public void mouseClicked(MouseEvent arg0) {
        System.out.println(arg0.getSource().getName());
        int a = arg0.getSource().getName();
        getImageIcon.labels.get(a);
        CreateFrame(arg0.getSource().getDescription());
    }

    private void CreateFrame() {
        JFrame frame2 = new JFrame("Test");
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        JPanel panel3 = new JPanel();
        JButton next = new JButton("Next");
        JButton previous = new JButton ("Previous");
        JButton diashow = new JButton ("Diashow");
        panel3.add(next);
        panel3.add(previous);
        panel3.add(diashow);
        panel3.setVisible(true);
        frame2.setVisible(true);
        frame2.add(panel3);
    }



    private void CreateFrame(String s) {
        JFrame frame2 = new JFrame("Test");
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        JPanel panel3 = new JPanel();
        JButton next = new JButton("Next");
        JButton previous = new JButton ("Previous");
        JButton diashow = new JButton ("Diashow");
        panel3.add(next);
        panel3.add(previous);
        panel3.add(diashow);
        panel3.setVisible(true);
        frame2.setVisible(true);
        frame2.add(panel3);
        panel3.add(new JLabel(s));

    }

    @Override
    public void mouseEntered(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseExited(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mousePressed(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseReleased(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }

}

Answer 1

对此有多种可能的方法，none 其中涉及：

Getting a Path from an ImageIcon..

见What is the XY problem?

一种方式：

File[] f = chooser.getSelectedFiles();

将 File[] f 声明为 class 的属性，以便以后可以访问。单击时，找到源组件，获取图像图标，并从中获取图像。

JLabel label = (JLabel)mouseEvent.getSource();
ImageIcon imageIcon = (ImageIcon)label.getIcon();
Image img = imageIcon.getImage();

然后：

int index = scaled.get(img);

& 文件是：

File file = f[index];

从显示在 JLabel 上的 ImageIcon 获取路径

Getting a Path from an ImageIcon which is displayed on a JLabel

java

swing

file

path

imageicon