本案例通过使用JFileChooser实现对选定文件夹内图片实现自动播放和暂停播放
代码如下，如有不合适的地方 还请指教
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package com.xiaoqiang;import java.awt.Container;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import java.util.Timer;import java.util.TimerTask;/** * 本例通过JFileChooser选择文件夹 * 对文件夹内图片进行滚动播放 用到TimerTask以及ActionListener * 详细解释JFileChooser使用及图片滚动过程需要的思维 * @author xiaoqiang * @timer 2017年4月27日 */public class PlayPicture extends JFrame implements ActionListener{ private File fileDirectory; private JFileChooser fileChooser; private Container con; private JButton nextPic; private JButton previousPic; private JButton showPic; private JButton beginPlayPic; private JButton stopPlayPic; private JLabel picIcon; private String[] fileName; private String parentPath; private static boolean play; private static PlayPicture playPicture; private int i=-1; private PlayPicture(){ super("图片自动播放器"); this.draw(); } /** * 获取单例类 * 用于TimerTask执行时调用同一对象 * @return Object */ public static Object getInstance(){ if(playPicture==null) playPicture=new PlayPicture(); return playPicture; } /** * 画图方法 将GUI画出来 * 因为练习图片滚动和JFileChooser * 所以GUI比较难看 */ public void draw(){ con=this.getContentPane(); con.setLayout(new FlowLayout()); showPic=new JButton("请选择目录"); con.add(showPic); showPic.addActionListener(this); picIcon=new JLabel("请选择目录展示图片"); con.add(picIcon); previousPic=new JButton("上一张"); con.add(previousPic); previousPic.addActionListener(this); nextPic=new JButton("下一张"); con.add(nextPic); nextPic.addActionListener(this); beginPlayPic=new JButton("开始自动播放"); stopPlayPic=new JButton("停止自动播放"); con.add(beginPlayPic); con.add(stopPlayPic); beginPlayPic.addActionListener(this); stopPlayPic.addActionListener(this); this.setLocation(550, 200); this.setSize(900,700); this.setVisible(true); } /** * 执行自动播放效果 * 注意使用的单例类 * 暂停的话设置单例类静态变量 * play为false */ public void automatic(){ TimerTask task = new TimerTask() { @Override public void run() { ((PlayPicture) PlayPicture.getInstance()).NextPicture(); if(!((PlayPicture)PlayPicture.getInstance()).play){ ((PlayPicture) PlayPicture.getInstance()).previousPicture(); } } }; Timer timer = new Timer(); long delay = 0; //intevalPeriod为秒数 long intevalPeriod = 5 * 1000; timer.scheduleAtFixedRate(task, delay, intevalPeriod); } @Override public void actionPerformed(ActionEvent e) { if(e.getSource().equals(showPic)){ //设置G盘为默认打开路径 fileChooser=new JFileChooser(new File("G:")); /* * 设置可以选择文件夹，默认为只允许选择文件 * * DIRECTORIES_ONLY 指示仅显示目录。 * FILES_AND_DIRECTORIES 指示显示文件和目录 * FILES_ONLY 指示仅显示文件。(默认) * */ fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); //把JFileChooser释放 fileChooser.showOpenDialog(this); fileDirectory=fileChooser.getSelectedFile(); i=-1;//每次打开都将i重置 方便播放文件 parentPath=fileDirectory.getAbsolutePath(); fileName=fileDirectory.list(); if(hasPicture()){ this.NextPicture(); setBottonEnabled(true); }else{ picIcon.setText("该目录没有图片哦"); picIcon.setIcon(null); setBottonEnabled(false); } }else if(e.getSource().equals(nextPic)){ this.NextPicture(); }else if(e.getSource().equals(previousPic)){ this.previousPicture(); }else if(e.getSource().equals(beginPlayPic)){ this.automatic(); play=true; }else if(e.getSource().equals(stopPlayPic)){ play=false; } } //设置按钮不可用 private void setBottonEnabled(boolean available){ nextPic.setEnabled(available); previousPic.setEnabled(available); beginPlayPic.setEnabled(available); stopPlayPic.setEnabled(available); } //判断所选路径是否有图片 private boolean hasPicture(){ for(String s:fileName){ if(s.matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$")) return true; } return false; } private void previousPicture(){ if(i==0){ i=fileName.length-1; } while(!fileName[--i].matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$")){ if(i==-1){ i=fileName.length; } } System.out.println(i); picIcon.setIcon(new ImageIcon(parentPath+"\\"+fileName[i])); picIcon.setText(""); } private void NextPicture() { if(i==fileName.length-1){ i=0; } while(!fileName[++i].matches("(?i).*(.jpg|.png|.gif|.bpm|.jpeg)$")){ if(i==fileName.length-1){ i=-1; } } System.out.println(i); picIcon.setIcon(new ImageIcon(parentPath+"\\"+fileName[i])); picIcon.setText(""); } public static void main(String[] args) { //获取实例调用构造方法 PlayPicture.getInstance(); }} |
以上所述是小编给大家介绍的JFileChooser实现对选定文件夹内图片自动播放和暂停播放实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/crpxnmmafq/article/details/70876399
