本案例通過使用JFileChooser實現對選定文件夾內圖片實現自動播放和暫停播放
代碼如下，如有不合適的地方 還請指教
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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;/** * 本例通過JFileChooser選擇文件夾 * 對文件夾內圖片進行滾動播放 用到TimerTask以及ActionListener * 詳細解釋JFileChooser使用及圖片滾動過程需要的思維 * @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("圖片自動播放器"); this.draw(); } /** * 獲取單例類 * 用于TimerTask執行時調用同一對象 * @return Object */ public static Object getInstance(){ if(playPicture==null) playPicture=new PlayPicture(); return playPicture; } /** * 畫圖方法 將GUI畫出來 * 因為練習圖片滾動和JFileChooser * 所以GUI比較難看 */ public void draw(){ con=this.getContentPane(); con.setLayout(new FlowLayout()); showPic=new JButton("請選擇目錄"); con.add(showPic); showPic.addActionListener(this); picIcon=new JLabel("請選擇目錄展示圖片"); con.add(picIcon); previousPic=new JButton("上一張"); con.add(previousPic); previousPic.addActionListener(this); nextPic=new JButton("下一張"); con.add(nextPic); nextPic.addActionListener(this); beginPlayPic=new JButton("開始自動播放"); stopPlayPic=new JButton("停止自動播放"); con.add(beginPlayPic); con.add(stopPlayPic); beginPlayPic.addActionListener(this); stopPlayPic.addActionListener(this); this.setLocation(550, 200); this.setSize(900,700); this.setVisible(true); } /** * 執行自動播放效果 * 注意使用的單例類 * 暫停的話設置單例類靜態變量 * play為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為秒數 long intevalPeriod = 5 * 1000; timer.scheduleAtFixedRate(task, delay, intevalPeriod); } @Override public void actionPerformed(ActionEvent e) { if(e.getSource().equals(showPic)){ //設置G盤為默認打開路徑 fileChooser=new JFileChooser(new File("G:")); /* * 設置可以選擇文件夾，默認為只允許選擇文件 * * DIRECTORIES_ONLY 指示僅顯示目錄。 * FILES_AND_DIRECTORIES 指示顯示文件和目錄 * FILES_ONLY 指示僅顯示文件。(默認) * */ fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); //把JFileChooser釋放 fileChooser.showOpenDialog(this); fileDirectory=fileChooser.getSelectedFile(); i=-1;//每次打開都將i重置 方便播放文件 parentPath=fileDirectory.getAbsolutePath(); fileName=fileDirectory.list(); if(hasPicture()){ this.NextPicture(); setBottonEnabled(true); }else{ picIcon.setText("該目錄沒有圖片哦"); 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; } } //設置按鈕不可用 private void setBottonEnabled(boolean available){ nextPic.setEnabled(available); previousPic.setEnabled(available); beginPlayPic.setEnabled(available); stopPlayPic.setEnabled(available); } //判斷所選路徑是否有圖片 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) { //獲取實例調用構造方法 PlayPicture.getInstance(); }} |
以上所述是小編給大家介紹的JFileChooser實現對選定文件夾內圖片自動播放和暫停播放實例代碼，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對服務器之家網站的支持！
原文鏈接：http://blog.csdn.net/crpxnmmafq/article/details/70876399
