用 JFileChooser 实现图像的浏览和显示

关键代码是利用FileNameExtensionFilter 实现图像文件的过滤 不用自己重新复写FileFilter

         所以代码变得很简洁

 

以下是具体的实现代码 希望对大家有启发作用哦

 

 

 

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import javax.swing.*;import javax.swing.filechooser.FileFilter;import javax.swing.filechooser.FileNameExtensionFilter;public class PictureUpload extends JFrame{final private JPanel panel;final private JToolBar toolbar;final private JLabel picLabel;//用来显示图像的标签public PictureUpload(){this.setTitle("显示图像程序");this.setBounds(200, 200, 300, 300);BorderLayout bl = new BorderLayout();this.setLayout(bl);panel = new JPanel();picLabel = new JLabel();panel.add(picLabel);this.getContentPane().add(panel,BorderLayout.CENTER);toolbar = new JToolBar();final JButton button = new JButton("打开");button.addActionListener(new btnActionListener());toolbar.add(button); this.getContentPane().add(toolbar,BorderLayout.NORTH); this.setVisible(true);}class btnActionListener implements ActionListener{public File browsefile;public void actionPerformed(ActionEvent e){final JFileChooser filechooser = new JFileChooser();FileNameExtensionFilter filter=new FileNameExtensionFilter("jpeg,gif,bmp,png", "jpg", "gif","png","gif"); //设置文件过滤器 filechooser.setFileFilter(filter);try{ filechooser.showOpenDialog(null); // }catch(HeadlessException ex){System.out.println("HeadlessException");ex.printStackTrace();}browsefile = filechooser.getSelectedFile(); Icon icon = new ImageIcon(browsefile.getAbsolutePath());//获得图像文件 picLabel.setIcon(icon); }}public static void main(String args[]){new PictureUpload();}}