我的java代码特别不面向对象。
实现的功能是查看，左右切换，放大缩小。
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
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.SwingUtilities;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import javax.swing.event.MouseInputAdapter;
public class pictureview extends JFrame {
private File file;
private int lar, nar, tim;
private boolean flag;
private JLabel lab1;
private JMenuBar bar;
private jmenu fileMenu;
private String path = "";
private ImageIcon bufImage;
private JPanel jpanel, ipanel;
private FileDialog openDia, saveDia;
private jmenuItem next, open, save, close, large, narrow, prev, wr;
pictureview() {
super("图片");
init();
}
public void init() {
this.setBounds(200, 100, 650, 600);
this.setLayout(new BorderLayout());
bar = new JMenuBar();
bar.setPreferredSize(new Dimension(-1, 60));
bar.setBackground(new Color(70,70,70));
bar.setBorderPainted(true);
bar.setMargin(new Insets(5, 0, 0, 0));
fileMenu = new jmenu("查看图片");
ImageIcon image = new ImageIcon("C:\\Users\\LENOVO\\Pictures\\love.png");
wr = new jmenuItem(" 旋转");
wr.setIcon(image);
large = new jmenuItem(" 放大");
large.setIcon(image);
narrow = new jmenuItem(" 缩小");
narrow.setIcon(image);
prev = new jmenuItem("上一张");
prev.setIcon(image);
next = new jmenuItem("下一张");
next.setIcon(image);
open = new jmenuItem(" 打开 ");
save = new jmenuItem(" 保存 ");
close = new jmenuItem(" 关闭 ");
fileMenu.add(open);
fileMenu.add(save);
fileMenu.add(close);
bar.add(fileMenu);
bar.add(large);
bar.add(narrow);
bar.add(wr);
bar.add(prev);
bar.add(next);
this.setJMenuBar(bar);
lab1 = new JLabel();
ipanel = new JPanel();
ipanel.setBackground(Color.gray);
ipanel.add(lab1);
this.add(ipanel, BorderLayout.CENTER);
mymouse listener=new mymouse();
lab1.addMouseListener(listener);
lab1.addMouseMotionListener(listener);
openDia = new FileDialog(this, "打开", FileDialog.LOAD);
saveDia = new FileDialog(this, "保存", FileDialog.SAVE);
myEvent();
this.setVisible(true);
}
public class mymouse extends MouseInputAdapter{
Point point=new Point(0,0);
public void mousePressed(MouseEvent e) {
point = SwingUtilities.convertPoint(lab1, e.getPoint(),lab1.getParent() );
}
public void mouseDragged(MouseEvent e) {
Point newPoint = SwingUtilities.convertPoint(lab1, e.getPoint(), lab1.getParent());
lab1.setLocation(lab1.getX() + (newPoint.x - point.x), lab1.getY() + (newPoint.y - point.y));
point = newPoint;
}
}
public void clear() {
lar = 1;
nar = 1;
tim = 0;
flag = true;
}
public void judge() {
if (lar >= nar)
addimage(path, true, lar - nar + 1);
else if (nar > lar)
addimage(path, false, -lar + nar + 1);
}
public void myEvent() {
lab1.addMouseListener(new MouseAdapter() {
public void mouseMoved(MouseEvent e) {
}
});
open.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
openDia.setVisible(true);
String dir = openDia.getDirectory();
String name = openDia.getFile();
if (dir == null || name == null)
return;
else {
file = new File(dir);
path = dir + name;
clear();
addimage(path, flag, lar);
}
}
});
save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
saveDia.setVisible(true);
String dir = saveDia.getDirectory();
String name = saveDia.getFile();
if (dir == null || name == null)
return;
file = new File(dir, name);
try {
BufferedImage ima = ImageIO.read(new File(path));
String fileName = file.getName();
String fileTyle = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());
ImageIO.write(ima, fileTyle, file);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
close.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
large.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
lar++;
if (path.equals(new String("")))
return;
if ((lar - nar) >= 4 || (nar - lar) >= 4) {
lar--;
return;
}
judge();
}
});
narrow.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
nar++;
if (path.equals(new String("")))
return;
if ((lar - nar) >= 4 || (nar - lar) >= 4) {
nar--;
return;
}
judge();
}
});
wr.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (path.equals(new String("")))
return;
tim++;
BufferedImage ima;
try {
ima = ImageIO.read(new File(path));
ima = rotateImage(ima, (tim * 90) % 360);
ImageIcon im = new ImageIcon();
im.setImage((Image) ima);
lab1.setIcon(im);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
next.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (path.equals(new String("")))
return;
String path1 = readFile1(file);
clear();
addimage(path1, flag, lar);
path = path1;
}
});
prev.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (path.equals(new String("")))
return;
String path1 = readFile2(file);
clear();
addimage(path1, flag, lar);
path = path1;
}
});
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public void addimage(String iname, boolean flag, int times) {
bufImage = new ImageIcon(iname);
int cx = bufImage.getIconWidth();
int cy = bufImage.getIconHeight();
if (cx > this.getWidth() - 100 || cy > this.getHeight() - 130) {
cx = this.getWidth() - 100;
cy = this.getHeight() - 130;
}
if (flag == true) {
cx = cx * times;
cy = cy * times;
} else {
cx = cx / times;
cy = cy / times;
}
bufImage.setImage(bufImage.getImage().getScaledInstance(cx, cy, Image.SCALE_DEFAULT));
/*
* if(bufImage.getIconWidth() > this.getWidth() - 100 ||
* bufImage.getIconHeight() > this.getHeight() - 130)
* bufImage.setImage(bufImage.getImage().getScaledInstance(this.getWidth() -
* 100, this.getHeight() - 130, Image.SCALE_DEFAULT));
*/
lab1.setIcon(bufImage);
}
public static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) {
int w = bufferedimage.getWidth();
int h = bufferedimage.getHeight();
int type = bufferedimage.getColorModel().getTransparency();
BufferedImage img;
Graphics2D graphics2d;
(graphics2d = (img = new BufferedImage(w, h, type)).createGraphics())
.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);
graphics2d.drawImage(bufferedimage, 0, 0, null);
graphics2d.dispose();
return img;
}
public String readFile1(File mfile) {
File[] file = mfile.listFiles();
int flag = 0;
for (int i = 0; i < file.length; i++) {
if ((!(file[i].getAbsolutePath().toString().equals(path))) && (flag == 0))
continue;
flag++;
String filename = file[i].getName();
if (flag > 1 && (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".gif")
|| filename.endsWith(".jpeg"))) {
return file[i].getAbsolutePath().toString();
}
}
for (int i = 0; i < file.length; i++) {
String filename = file[i].getName();
if (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".gif")) {
return file[i].getAbsolutePath().toString();
}
}
return path;
}
public String readFile2(File mfile) {
File[] file = mfile.listFiles();
int flag = 0;
for (int i = file.length - 1; i >= 0; i--) {
if ((!(file[i].getAbsolutePath().toString().equals(path))) && (flag == 0))
continue;
flag++;
String filename = file[i].getName();
if (flag > 1 && (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".gif")
|| filename.endsWith(".jpeg"))) {
return file[i].getAbsolutePath().toString();
}
}
for (int i = file.length - 1; i >= 0; i--) {
String filename = file[i].getName();
if (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".gif")) {
return file[i].getAbsolutePath().toString();
}
}
return path;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
new pictureview();
}
}import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;
import javax.swing.JMenu;
import javax.swing.border.LineBorder;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;
import javax.swing.event.MouseInputAdapter;
public class jmenu extends JMenu{
jmenu(String s){
super(s);
this.setFont(new Font("黑体",Font.PLAIN,20));
this.setForeground(Color.BLACK);
this.setOpaque(true);
//this.setBackground(new Color(138,43,226));
this.setBackground(new Color(138,43,226));
this.setFocusPainted(false);
//this.setBorder(new LineBorder(Color.BLACK));
this.setBorderPainted(false);
this.setMargin(new Insets(0,0,0,0));
my_Event();
}
public void init() {
this.setFont(new Font("黑体",Font.PLAIN,20));
this.setForeground(Color.BLACK);
this.setOpaque(true);
//this.setBackground(new Color(138,43,226));
setback();
this.setFocusPainted(false);
this.setBorderPainted(false);
this.setMargin(new Insets(0,0,0,0));
}
public void set() {
this.setBackground(new Color(138,43,226));
}
public void setback() {
this.setBackground(Color.white);
}
public void my_Event() {
this.addMouseListener(new MouseInputAdapter() {
public void mouseExited(MouseEvent e) {
setback();
}
public void mouseClicked(MouseEvent e){
set();
}
public void mouseReleased(MouseEvent e){
set();
}
public void mousePressed(MouseEvent e) {
set();
}
public void mouseDragged(MouseEvent e) {
setback();
}
public void mouseMoved(MouseEvent e) {
setback();
}
});
this.addMouseMotionListener(new MouseInputAdapter() {
public void mouseExited(MouseEvent e) {
setback();
}
public void mouseClicked(MouseEvent e){
set();
}
public void mouseReleased(MouseEvent e){
set();
}
public void mousePressed(MouseEvent e) {
set();
}
public void mouseDragged(MouseEvent e) {
setback();
}
public void mouseMoved(MouseEvent e) {
setback();
}
});
}
}import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.Point;
import java.awt.event.*;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JMenuItem;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
import javax.swing.event.MenuDragMouseListener;
import javax.swing.event.MouseInputAdapter;
public class jmenuItem extends JMenuItem{
jmenuItem(String s){
super(s);
init();
my_Event();
}
jmenuItem(ImageIcon image){
super(image);
init();
my_Event();
}
public void init() {
this.setFont(new Font("黑体",Font.PLAIN,18));
this.setForeground(Color.BLACK);
this.setPreferredSize(new Dimension(100,50));
this.setBackground(Color.WHITE);
this.setOpaque(true);
this.setFocusPainted(false);
this.setBorderPainted(false);
this.setMargin(new Insets(0,0,0,0));
}
public void setback() {
this.setOpaque(true);
this.setBackground(new Color(138,43,226));
}
public void my_Event() {
this.addMouseListener(new MouseInputAdapter() {
public void mouseExited(MouseEvent e) {
init();
}
public void mouseClicked(MouseEvent e){
setback();
}
public void mouseReleased(MouseEvent e){
setback();
}
public void mousePressed(MouseEvent e) {
setback();
}
public void mouseDragged(MouseEvent e) {
init();
}
public void mouseMoved(MouseEvent e) {
init();
}
});
this.addMouseMotionListener(new MouseInputAdapter() {
public void mouseExited(MouseEvent e) {
init();
}
public void mouseClicked(MouseEvent e){
setback();
}
public void mouseReleased(MouseEvent e){
setback();
}
public void mousePressed(MouseEvent e) {
setback();
}
public void mouseDragged(MouseEvent e) {
init();
}
public void mouseMoved(MouseEvent e) {
init();
}
});
}
}
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