图片打开器

       25号考完试后，华信就开课了，从26号开始到30号，要从下午两点半到晚上九点半上课，写代码，这几天我写了图片打开器。

图片打开器能够打开单个图片，也能打开一个文件夹里的所有图片，就是用文件搜索的原理搜索图片文件，然后用卡片布局一个个打开。代码如下：

package 图片查看器;

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.util.ArrayList;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;

public class SearchP extends JFrame {
	public JPanel picPanel;// 创建图片面板
	public JPanel WindowPanel;// 创建窗体面板
	public JPanel ButtonPanel;// 创建按钮面板
	public JMenuBar menu;// 创建菜单项
	public Graphics g;
	public String path;
	public CardLayout cl = new CardLayout();;
	public static ArrayList<String> list = new ArrayList<String>();

	public static void main(String[] args) {
		// 设置程序打开界面
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (Exception e) {
			e.printStackTrace();
		}
		new SearchP().initFrame();
	}

	public void initFrame() {
		setTitle("图片查看器");
		setSize(800, 600);
		setDefaultCloseOperation(3);
		setLocationRelativeTo(null);
		// 窗体面板设置布局
		WindowPanel = new JPanel();
		BorderLayout bd = new BorderLayout();
		WindowPanel.setLayout(bd);
		// 创建菜单项
		menu = new JMenuBar();
		JMenu jm = new JMenu("文件");
		JMenuItem jmi = new JMenuItem("打开");
		JMenuItem jmi2 = new JMenuItem("路径");
		jm.add(jmi);
		jm.add(jmi2);
		menu.add(jm);
		WindowPanel.add(menu, bd.NORTH);
		// 创建按钮面板
		ButtonPanel = new JPanel();
		ButtonPanel.setBackground(Color.green);
		ActionListener button_aciton = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				// 监听按钮面板的按钮
				String s = e.getActionCommand();
				if("下一张".equals(s)){
					cl.next(picPanel);
				}
				if("上一张".equals(s)){
					cl.previous(picPanel);
				}
				if("第一张".equals(s)){
					cl.first(picPanel);
				}
				if("最后一张".equals(s)){
					cl.last(picPanel);
				}
			}
		};
		String[] ButtonName = { "第一张", "上一张", "下一张", "最后一张" };
		for (int i = 0; i < 4; i++) {
			JButton jb = new JButton(ButtonName[i]);
			jb.setActionCommand(ButtonName[i]);
			ButtonPanel.add(jb);
			jb.addActionListener(button_aciton);
		}
		WindowPanel.add(ButtonPanel, bd.SOUTH);
		// 创建图片面板
		picPanel = new JPanel();
		WindowPanel.add(picPanel);
		picPanel.setBackground(Color.gray);
		picPanel.setLayout(cl);
		this.add(WindowPanel);
		setVisible(true);

		ActionListener jmi_action = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				// 监听打开文件的操作
				openfile();
			}
		};
		ActionListener jmi2_aciton = new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				// 监听打开路径
				JTextField jt = new JTextField(30);
				JButton jb = new JButton("确定");
				JFrame jf = new JFrame("选择文件目录");
				jf.setSize(300, 80);
				jf.setLocationRelativeTo(null);
				jf.setLayout(new FlowLayout());
				jf.add(jt);
				jf.add(jb);
				jf.setVisible(true);
				jf.setDefaultCloseOperation(2);
				ActionListener jbaction = new ActionListener() {
					public void actionPerformed(ActionEvent e) {
						path = jt.getText();
						openDirectynext(path);
						for(int i=0;i<list.size();i++){
							JPanel jp = new JPanel();
							JLabel jl = new JLabel();
							ImageIcon icon = new ImageIcon(list.get(i));
							jl.setIcon(icon);
							jp.add(jl);
							picPanel.add(jp);
						}
					}
				};
				jb.addActionListener(jbaction);
			}
		};
		
		jmi.addActionListener(jmi_action);
		jmi2.addActionListener(jmi2_aciton);
		
		MouseAdapter adapter = new MouseAdapter() {
			public void mouseClicked(MouseEvent e) {
				cl.next(picPanel);
//				cl.previous(picPanel);
//				cl.first(picPanel);
//				cl.last(SearchP.this.getContentPane());
			}
		};
		this.addMouseListener(adapter);;
	}

	// 实现监听打开文件的操作
	public void openfile() {
		JFileChooser jfc = new JFileChooser();
		jfc.showOpenDialog(null);
		File file = jfc.getSelectedFile();
		if (file.getAbsolutePath().substring(file.getAbsolutePath().length() - 4).equals(".gif")) {
			JPanel newPanel = new JPanel();
			ImageIcon icon = new ImageIcon(file.getAbsolutePath());
			JLabel jl = new JLabel(icon);
			newPanel.add(jl);
			picPanel.add(newPanel);
			newPanel.updateUI();
		}
		if (file.getAbsolutePath().substring(file.getAbsolutePath().length() - 4).equals(".png")) {
			JPanel newPanel = new JPanel();
			ImageIcon icon = new ImageIcon(file.getAbsolutePath());
			JLabel jl = new JLabel(icon);
			newPanel.add(jl);
			picPanel.add(newPanel);
			newPanel.updateUI();
		}
	}

	// 实现按钮的操作
	public void buttonAction() {

	}

	// 实现路径打开
	public void openDirecty() {

	}

	public void openDirectynext(String path) {
		File file = new File(path);
		if (file.exists()) {
			if (file.isFile()) {
				if (file.getName().endsWith(".png")) {
					list.add(file.getAbsolutePath());
				}
			} else if (file.isDirectory()) {
				File[] files = file.listFiles();
				for (File f : files) {
					openDirectynext(f.getAbsolutePath());
				}
			}
		}
	}

	
}

这就是文件打开器