JAVA截屏小程序
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JAVA截屏小程序
发布于 日 22时
import java.awt.BorderL
import java.awt.B
import java.awt.C
import java.awt.F
import java.awt.G
import java.awt.P
import java.awt.R
import java.awt.R
import java.awt.event.ActionE
import java.awt.event.ActionL
import java.awt.image.BufferedI
import java.io.F
import java.io.IOE
import javax.imageio.ImageIO;
import javax.swing.JF
public class ScreenSSS
public static void main(String[] args)
new MakeJPEG();
class MakeJPEG extends JFrame implements ActionListener
Button ??????, ???????;
Panel pCenter, PSouth, pN
public MakeJPEG()
super("???Jpeg???");
setVisible(true);
setBounds(0, 0, 750, 580);
?????? = new Button("??????");
??????.addActionListener(this);
??????? = new Button("???????");
???????.addActionListener(this);
setBackground(Color.yellow);
pCenter = new Panel();
pCenter.setLayout(null);
pCenter.setBackground(Color.gray);
pNorth = new Panel();
pNorth.add(??????);
pNorth.add(???????);
add(pNorth, BorderLayout.NORTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
validate();
public void paint(Graphics g)
g.drawImage(image, 0, 0, 800, 600, this);
public void actionPerformed(ActionEvent e)
if(e.getSource() == ??????)
Robot robot = null;
try{robot = new Robot();}
catch(Exception er)
Rectangle screenRect = null;
int width = getToolkit().getScreenSize().
int height = getToolkit().getScreenSize().
screenRect = new Rectangle(0,0,width,height);
this.setVisible(false);
robot.delay(500);
image = robot.createScreenCapture(screenRect);
this.setVisible(true);
repaint();
if(e.getSource() == ???????)
String fileName = "test.jpg";
File file = new File(fileName);
try {ImageIO.write(image, "JPEG", file);}
catch(IOException es){
[代码] [Java]代码
import java.awt.BorderL
import java.awt.B
import java.awt.C
import java.awt.F
import java.awt.G
import java.awt.P
import java.awt.R
import java.awt.R
import java.awt.event.ActionE
import java.awt.event.ActionL
import java.awt.image.BufferedI
import java.io.F
import java.io.IOE
import javax.imageio.ImageIO;
import javax.swing.JF
public class ScreenSSS
public static void main(String[] args)
new MakeJPEG();
class MakeJPEG extends JFrame implements ActionListener
Button 捕捉屏幕, 保存文件;
Panel pCenter, PSouth, pN
public MakeJPEG()
super("生成Jpeg图像");
setVisible(true);
setBounds(0, 0, 750, 580);
捕捉屏幕 = new Button("捕捉屏幕");
捕捉屏幕.addActionListener(this);
保存文件 = new Button("保存文件");
保存文件.addActionListener(this);
setBackground(Color.yellow);
pCenter = new Panel();
pCenter.setLayout(null);
pCenter.setBackground(Color.gray);
pNorth = new Panel();
pNorth.add(捕捉屏幕);
pNorth.add(保存文件);
add(pNorth, BorderLayout.NORTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
validate();
public void paint(Graphics g)
g.drawImage(image, 0, 0, 800, 600, this);
public void actionPerformed(ActionEvent e)
if(e.getSource() == 捕捉屏幕)
Robot robot = null;
try{robot = new Robot();}
catch(Exception er)
Rectangle screenRect = null;
int width = getToolkit().getScreenSize().
int height = getToolkit().getScreenSize().
screenRect = new Rectangle(0,0,width,height);
this.setVisible(false);
robot.delay(500);
image = robot.createScreenCapture(screenRect);
this.setVisible(true);
repaint();
if(e.getSource() == 保存文件)
String fileName = "test.jpg";
File file = new File(fileName);
try {ImageIO.write(image, "JPEG", file);}
catch(IOException es){ }
TA的最新馆藏[转]&[转]&[转]&[转]&[转]&[转]&java编程实现屏幕截图(截屏)代码总结
本文实例总结了常见的编程实现屏幕截图方法。分享给大家供大家参考，具体如下：
import java.awt.D
import java.awt.D
import java.awt.R
import java.awt.R
import java.awt.T
import java.awt.image.BufferedI
import java.io.F
import javax.imageio.ImageIO;
public class CaptureScreen {
public static void captureScreen(String fileName, String folder) throws Exception {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle screenRectangle = new Rectangle(screenSize);
Robot robot = new Robot();
BufferedImage image = robot.createScreenCapture(screenRectangle);
//保存路径
File screenFile = new File(fileName);
if (!screenFile.exists()) {
screenFile.mkdir();
File f = new File(screenFile, folder);
ImageIO.write(image, "png", f);
//自动打开
if (Desktop.isDesktopSupported()
&& Desktop.getDesktop().isSupported(Desktop.Action.OPEN))
Desktop.getDesktop().open(f);
public static void main(String[] args) {
captureScreen("e:\\你好","11.png");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
package com.qiu.
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
* 一个简单的屏幕抓图
public class ScreenCapture {
// test main
public static void main(String[] args) throws Exception {
String userdir = System.getProperty("user.dir");
File tempFile = new File("d:", "temp.png");
ScreenCapture capture = ScreenCapture.getInstance();
capture.captureImage();
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JLabel imagebox = new JLabel();
panel.add(BorderLayout.CENTER, imagebox);
imagebox.setIcon(capture.getPickedIcon());
capture.saveToFile(tempFile);
capture.captureImage();
imagebox.setIcon(capture.getPickedIcon());
frame.setContentPane(panel);
frame.setSize(400, 300);
frame.show();
System.out.println("Over");
private ScreenCapture() {
robot = new Robot();
} catch (AWTException e) {
System.err.println("Internal Error: " + e);
e.printStackTrace();
JPanel cp = (JPanel) dialog.getContentPane();
cp.setLayout(new BorderLayout());
labFullScreenImage.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent evn) {
isFirstPoint =
pickedImage = fullScreenImage.getSubimage(recX, recY, recW,
dialog.setVisible(false);
labFullScreenImage.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent evn) {
if (isFirstPoint) {
x1 = evn.getX();
y1 = evn.getY();
isFirstPoint =
x2 = evn.getX();
y2 = evn.getY();
int maxX = Math.max(x1, x2);
int maxY = Math.max(y1, y2);
int minX = Math.min(x1, x2);
int minY = Math.min(y1, y2);
recX = minX;
recY = minY;
recW = maxX - minX;
recH = maxY - minY;
labFullScreenImage.drawRectangle(recX, recY, recW, recH);
public void mouseMoved(MouseEvent e) {
labFullScreenImage.drawCross(e.getX(), e.getY());
cp.add(BorderLayout.CENTER, labFullScreenImage);
dialog.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
dialog.setAlwaysOnTop(true);
dialog.setMaximumSize(Toolkit.getDefaultToolkit().getScreenSize());
dialog.setUndecorated(true);
dialog.setSize(dialog.getMaximumSize());
dialog.setModal(true);
// Singleton Pattern
public static ScreenCapture getInstance() {
return defaultC
/** 捕捉全屏慕 */
public Icon captureFullScreen() {
fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit
.getDefaultToolkit().getScreenSize()));
ImageIcon icon = new ImageIcon(fullScreenImage);
/** 捕捉屏幕的一个矫形区域 */
public void captureImage() {
fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit
.getDefaultToolkit().getScreenSize()));
ImageIcon icon = new ImageIcon(fullScreenImage);
labFullScreenImage.setIcon(icon);
dialog.setVisible(true);
/** 得到捕捉后的BufferedImage */
public BufferedImage getPickedImage() {
return pickedI
/** 得到捕捉后的Icon */
public ImageIcon getPickedIcon() {
return new ImageIcon(getPickedImage());
* 储存为一个文件,为PNG格式
* @deprecated replaced by saveAsPNG(File file)
@Deprecated
public void saveToFile(File file) throws IOException {
ImageIO.write(getPickedImage(), defaultImageFormater, file);
/** 储存为一个文件,为PNG格式 */
public void saveAsPNG(File file) throws IOException {
ImageIO.write(getPickedImage(), "png", file);
/** 储存为一个JPEG格式图像文件 */
public void saveAsJPEG(File file) throws IOException {
ImageIO.write(getPickedImage(), "JPEG", file);
/** 写入一个OutputStream */
public void write(OutputStream out) throws IOException {
ImageIO.write(getPickedImage(), defaultImageFormater, out);
// singleton design pattern
private static ScreenCapture defaultCapturer = new ScreenCapture();
private int x1, y1, x2, y2;
private int recX, recY, recH, recW; // 截取的图像
private boolean isFirstPoint =
private BackgroundImage labFullScreenImage = new BackgroundImage();
private BufferedImage fullScreenI
private BufferedImage pickedI
private String defaultImageFormater = "png";
private JDialog dialog = new JDialog();
/** 显示图片的Label */
class BackgroundImage extends JLabel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawRect(x, y, w, h);
String area = Integer.toString(w) + " * " + Integer.toString(h);
g.drawString(area, x + (int) w / 2 - 15, y + (int) h / 2);
g.drawLine(lineX, 0, lineX, getHeight());
g.drawLine(0, lineY, getWidth(), lineY);
public void drawRectangle(int x, int y, int width, int height) {
repaint();
public void drawCross(int x, int y) {
repaint();
int lineX, lineY;
int x, y, h,
因为有最小化到系统托盘，还是需要一张名为bg.gif作为托盘图标，图片应放在同级目录下，否则会空指针异常。
主要的截屏代码部分是：
Robot ro=new Robot();
Toolkit tk=Toolkit.getDefaultToolkit();
Dimension di=tk.getScreenSize();
Rectangle rec=new Rectangle(0,0,di.width,di.height);
BufferedImage bi=ro.createScreenCapture(rec);
(源代码来源于CSDN)
import java.awt.*;
import java.awt.datatransfer.DataF
import java.awt.datatransfer.T
import java.awt.datatransfer.UnsupportedFlavorE
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import javax.imageio.*;
import java.awt.image.*;
public class CaptureScreen extends JFrame implements ActionListener{
private JButton start,cancel,saveA
private JP
private BufferedI
private JTabbedP//一个放置很多份图片
//一个一直会递增的索引,用于标认图片
private JRadioButton java,//JAVA界面,系统界面
/** Creates a new instance of CaptureScreen */
public CaptureScreen() {
super("屏幕截取软件(第三版)");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception exe){
exe.printStackTrace();
initWindow();
initOther();
initTrayIcon();
private void initOther(){
jtp=new JTabbedPane(JTabbedPane.TOP,JTabbedPane.SCROLL_TAB_LAYOUT);
private void initWindow(){
start=new JButton("开始截取");
saveAll=new JButton("保存所有");
cancel=new JButton("退出");
start.addActionListener(this);
saveAll.addActionListener(this);
cancel.addActionListener(this);
JPanel buttonJP=new JPanel();
c=new JPanel(new BorderLayout());
c.setBackground(Color.BLACK);
JLabel jl=new JLabel("屏幕截取",JLabel.CENTER);
jl.setFont(new Font("黑体",Font.BOLD,40));
jl.setForeground(Color.RED);
c.add(jl,BorderLayout.CENTER);
buttonJP.add(start);
buttonJP.add(saveAll);
buttonJP.add(cancel);
buttonJP.setBorder(BorderFactory.createTitledBorder("公共操作区"));
JPanel jp=new JPanel();//放两个单选按钮的面板
jp.add(java=new JRadioButton("java界面"));
jp.add(system=new JRadioButton("系统界面",true));
java.addActionListener(this);
system.addActionListener(this);
jp.setBorder(BorderFactory.createTitledBorder("界面风格"));
ButtonGroup bg=new ButtonGroup();
bg.add(java);
bg.add(system);
JPanel all=new JPanel();
all.add(jp);
all.add(buttonJP);
this.getContentPane().add(c,BorderLayout.CENTER);
this.getContentPane().add(all,BorderLayout.SOUTH);
this.setSize(500,400);
this.setLocationRelativeTo(null);
this.setVisible(true);
this.setAlwaysOnTop(true);
this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
CaptureScreen.this.setVisible(false);
private void initTrayIcon(){
SystemTray st=SystemTray.getSystemTray();
Image im=ImageIO.read(this.getClass().getResource("bg.gif"));
PopupMenu pm=new PopupMenu("弹出菜单");
pm.add(new MenuItem("关于")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
JOptionPane.showMessageDialog(CaptureScreen.this,"&html&&Font color=red&&center&&h2&关于&/h2&&/center&&/Font&" +
"这是一款纯JAVA的屏幕截取程序&br&在以前的基础上增加了一些常用的功能,&br&" +
"比如,批量保存,多幅截取,复制到系统粘帖板...&br&" +
"在使用过程中有任何问题,欢迎联系.&br&" +
"&Font size=5 color=blue&作者:千里冰封&br&" +
"&i&QQ:&/i&&br&&/Font&&/html&");
pm.addSeparator();
pm.add(new MenuItem("显示主窗口")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
CaptureScreen.this.setVisible(true);
pm.add(new MenuItem("开始截取")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
doStart();
pm.add(new MenuItem("退出程序")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
System.exit(0);
TrayIcon ti=new TrayIcon(im,"JAVA屏幕截取",pm);
st.add(ti);
ti.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
CaptureScreen.this.setVisible(true);
}catch(Exception exe){
exe.printStackTrace();
private void updates(){
this.setVisible(true);
if(get!=null){
//如果索引是0,则表示一张图片都没有被加入过,
//则要清除当前的东西,重新把tabpane放进来
if(index==0){
c.removeAll();
c.add(jtp,BorderLayout.CENTER);
}else{//否则的话,直接对tabpane添加面板就可以了
//就什么都不用做了
PicPanel pic=new PicPanel(get);
jtp.addTab("图片"+(++index),pic);
jtp.setSelectedComponent(pic);
SwingUtilities.updateComponentTreeUI(c);
private void doStart(){
this.setVisible(false);
Thread.sleep(500);//睡500毫秒是为了让主窗完全不见
Robot ro=new Robot();
Toolkit tk=Toolkit.getDefaultToolkit();
Dimension di=tk.getScreenSize();
Rectangle rec=new Rectangle(0,0,di.width,di.height);
BufferedImage bi=ro.createScreenCapture(rec);
JFrame jf=new JFrame();
Temp temp=new Temp(jf,bi,di.width,di.height);
jf.getContentPane().add(temp,BorderLayout.CENTER);
jf.setUndecorated(true);
jf.setSize(di);
jf.setVisible(true);
jf.setAlwaysOnTop(true);
} catch(Exception exe){
exe.printStackTrace();
*公共方法,处理保存所有的图片
public void saveCodeAll(){
if(jtp.getTabCount()==0){
JOptionPane.showMessageDialog(this,"图片不能为空!!","错误",JOptionPane.ERROR_MESSAGE);
JFileChooser jfc=new JFileChooser(".");
jfc.addChoosableFileFilter(new GIFfilter());
jfc.addChoosableFileFilter(new BMPfilter());
jfc.addChoosableFileFilter(new JPGfilter());
jfc.addChoosableFileFilter(new PNGfilter());
int i=jfc.showSaveDialog(this);
if(i==JFileChooser.APPROVE_OPTION){
File file=jfc.getSelectedFile();
String about="PNG";
String ext=file.toString().toLowerCase();
javax.swing.filechooser.FileFilter ff=jfc.getFileFilter();
if(ff instanceof JPGfilter){
about="JPG";
} else if(ff instanceof PNGfilter){
about="PNG";
}else if(ff instanceof BMPfilter){
about="BMP";
}else if(ff instanceof GIFfilter){
about="GIF";
if(ext.endsWith(about.toLowerCase())){
ext=ext.substring(0,ext.lastIndexOf(about.toLowerCase()));
//起一个线程去保存这些图片并显示出进度条
new SaveAllThread(ext,about).setVisible(true);
//专门用来保存所有图片的线程类,它还要显示出保存的进度条
private class SaveAllThread extends JDialog implements Runnable{
private S//文件名头部份
private S//文件格式
private JProgressB//一个进度条
private JL// 一个信息显示条
private int allTask,doneT//所有任务,已完成任务
public SaveAllThread(String name,String ext){
super(CaptureScreen.this,"保存",true);
this.name=
initWindow();
private void initWindow(){
jpb=new JProgressBar();
allTask=jtp.getTabCount();
jpb.setMaximum(allTask);
jpb.setMinimum(0);
jpb.setValue(0);
jpb.setStringPainted(true);
setProgressBarString();
info=new JLabel("正在保存到:");
this.getContentPane().setBackground(Color.CYAN);
this.add(info,BorderLayout.NORTH);
this.add(jpb,BorderLayout.SOUTH);
this.setUndecorated(true);
this.setSize(300,100);
this.setLocationRelativeTo(CaptureScreen.this);
new Thread(this).start();
private void setProgressBarString(){
jpb.setString(""+doneTask+"/"+allTask);
public void run(){
for(int i=0;i&allTi++){
PicPanel pp=(PicPanel)jtp.getComponentAt(i);
BufferedImage image=pp.getImage();
File f= new File(name+(doneTask+1)+"."+ext.toLowerCase());
info.setText("&html&&b&正在保存到:&/b&&br&"+f.toString()+"&/html&");
ImageIO.write(image,ext,f);
doneTask++;
jpb.setValue(doneTask);
setProgressBarString();
Thread.sleep(500);
JOptionPane.showMessageDialog(this,"保存完毕!!");
this.dispose();
}catch(Exception exe){
exe.printStackTrace();
this.dispose();
*公用的处理保存图片的方法
*这个方法不再私有了
public void saveCode(BufferedImage get){
if(get==null){
JOptionPane.showMessageDialog(this,"图片不能为空!!","错误",JOptionPane.ERROR_MESSAGE);
JFileChooser jfc=new JFileChooser(".");
jfc.addChoosableFileFilter(new GIFfilter());
jfc.addChoosableFileFilter(new BMPfilter());
jfc.addChoosableFileFilter(new JPGfilter());
jfc.addChoosableFileFilter(new PNGfilter());
int i=jfc.showSaveDialog(this);
if(i==JFileChooser.APPROVE_OPTION){
File file=jfc.getSelectedFile();
String about="PNG";
String ext=file.toString().toLowerCase();
javax.swing.filechooser.FileFilter ff=jfc.getFileFilter();
if(ff instanceof JPGfilter){
about="JPG";
if(!ext.endsWith(".jpg")){
String ns=ext+".jpg";
file=new File(ns);
} else if(ff instanceof PNGfilter){
about="PNG";
if(!ext.endsWith(".png")){
String ns=ext+".png";
file=new File(ns);
}else if(ff instanceof BMPfilter){
about="BMP";
if(!ext.endsWith(".bmp")){
String ns=ext+".bmp";
file=new File(ns);
}else if(ff instanceof GIFfilter){
about="GIF";
if(!ext.endsWith(".gif")){
String ns=ext+".gif";
file=new File(ns);
if(ImageIO.write(get,about,file)){
JOptionPane.showMessageDialog(this,"保存成功！");
JOptionPane.showMessageDialog(this,"保存失败！");
} catch(Exception exe){
exe.printStackTrace();
*公共的处理把当前的图片加入剪帖板的方法
public void copycode(final BufferedImage image){
if(get==null){
JOptionPane.showMessageDialog(this,"图片不能为空!!","错误",JOptionPane.ERROR_MESSAGE);
Transferable trans = new Transferable(){
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
public boolean isDataFlavorSupported(DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
if(isDataFlavorSupported(flavor))
throw new UnsupportedFlavorException(flavor);
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans, null);
JOptionPane.showMessageDialog(this,"已复制到系统粘帖板!!");
}catch(Exception exe){
exe.printStackTrace();
JOptionPane.showMessageDialog(this,"复制到系统粘帖板出错!!","错误",JOptionPane.ERROR_MESSAGE);
//处理关闭事件
private void doClose(Component c){
jtp.remove(c);
System.gc();
public void actionPerformed(ActionEvent ae){
Object source=ae.getSource();
if(source==start){
doStart();
} else if(source==cancel){
System.exit(0);
}else if(source==java){
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}catch(Exception exe){
exe.printStackTrace();
}else if(source==system){
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}catch(Exception exe){
exe.printStackTrace();
}else if(source==saveAll){
saveCodeAll();
//一个内部类,它表示一个面板,一个可以被放进tabpane的面板
//也有自己的一套处理保存和复制的方法
private class PicPanel extends JPanel implements ActionListener{
JButton save,copy,//表示保存,复制,关闭的按钮
BufferedI//得到的图片
public PicPanel(BufferedImage get){
super(new BorderLayout());
initPanel();
public BufferedImage getImage(){
private void initPanel(){
save=new JButton("保存(S)");
copy=new JButton("复制到剪帖板(C)");
close=new JButton("关闭(X)");
save.setMnemonic('S');
copy.setMnemonic('C');
close.setMnemonic('X');
JPanel buttonPanel=new JPanel();
buttonPanel.add(copy);
buttonPanel.add(save);
buttonPanel.add(close);
JLabel icon=new JLabel(new ImageIcon(get));
this.add(new JScrollPane(icon),BorderLayout.CENTER);
this.add(buttonPanel,BorderLayout.SOUTH);
save.addActionListener(this);
copy.addActionListener(this);
close.addActionListener(this);
public void actionPerformed(ActionEvent e) {
Object source=e.getSource();
if(source==save){
saveCode(get);
}else if(source==copy){
copycode(get);
}else if(source==close){
doClose(this);
//保存BMP格式的过滤器
private class BMPfilter extends javax.swing.filechooser.FileFilter{
public BMPfilter(){
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".bmp")||
file.isDirectory()){
public String getDescription(){
return "*.BMP(BMP图像)";
//保存JPG格式的过滤器
private class JPGfilter extends javax.swing.filechooser.FileFilter{
public JPGfilter(){
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".jpg")||
file.isDirectory()){
public String getDescription(){
return "*.JPG(JPG图像)";
//保存GIF格式的过滤器
private class GIFfilter extends javax.swing.filechooser.FileFilter{
public GIFfilter(){
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".gif")||
file.isDirectory()){
public String getDescription(){
return "*.GIF(GIF图像)";
//保存PNG格式的过滤器
private class PNGfilter extends javax.swing.filechooser.FileFilter{
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".png")||
file.isDirectory()){
public String getDescription(){
return "*.PNG(PNG图像)";
//一个暂时类，用于显示当前的屏幕图像
private class Temp extends JPanel implements MouseListener,MouseMotionListener{
private BufferedI
private int width,
private int startX,startY,endX,endY,tempX,tempY;
private JF
private Rectangle select=new Rectangle(0,0,0,0);//表示选中的区域
private Cursor cs=new Cursor(Cursor.CROSSHAIR_CURSOR);//表示一般情况下的鼠标状态
private States current=States.DEFAULT;// 表示当前的编辑状态
private Rectangle[]//表示八个编辑点的区域
//下面四个常量,分别表示谁是被选中的那条线上的端点
public static final int START_X=1;
public static final int START_Y=2;
public static final int END_X=3;
public static final int END_Y=4;
private int currentX,currentY;//当前被选中的X和Y,只有这两个需要改变
private Point p=new Point();//当前鼠标移的地点
private boolean showTip=//是否显示提示.如果鼠标左键一按,则提示不再显了
public Temp(JFrame jf,BufferedImage bi,int width,int height){
this.width=
this.height=
this.addMouseListener(this);
this.addMouseMotionListener(this);
initRecs();
private void initRecs(){
rec=new Rectangle[8];
for(int i=0;i&rec.i++){
rec[i]=new Rectangle();
public void paintComponent(Graphics g){
g.drawImage(bi,0,0,width,height,this);
g.setColor(Color.RED);
g.drawLine(startX,startY,endX,startY);
g.drawLine(startX,endY,endX,endY);
g.drawLine(startX,startY,startX,endY);
g.drawLine(endX,startY,endX,endY);
int x=startX&endX?startX:endX;
int y=startY&endY?startY:endY;
select=new Rectangle(x,y,Math.abs(endX-startX),Math.abs(endY-startY));
int x1=(startX+endX)/2;
int y1=(startY+endY)/2;
g.fillRect(x1-2,startY-2,5,5);
g.fillRect(x1-2,endY-2,5,5);
g.fillRect(startX-2,y1-2,5,5);
g.fillRect(endX-2,y1-2,5,5);
g.fillRect(startX-2,startY-2,5,5);
g.fillRect(startX-2,endY-2,5,5);
g.fillRect(endX-2,startY-2,5,5);
g.fillRect(endX-2,endY-2,5,5);
rec[0]=new Rectangle(x-5,y-5,10,10);
rec[1]=new Rectangle(x1-5,y-5,10,10);
rec[2]=new Rectangle((startX&endX?startX:endX)-5,y-5,10,10);
rec[3]=new Rectangle((startX&endX?startX:endX)-5,y1-5,10,10);
rec[4]=new Rectangle((startX&endX?startX:endX)-5,(startY&endY?startY:endY)-5,10,10);
rec[5]=new Rectangle(x1-5,(startY&endY?startY:endY)-5,10,10);
rec[6]=new Rectangle(x-5,(startY&endY?startY:endY)-5,10,10);
rec[7]=new Rectangle(x-5,y1-5,10,10);
if(showTip){
g.setColor(Color.CYAN);
g.fillRect(p.x,p.y,170,20);
g.setColor(Color.RED);
g.drawRect(p.x,p.y,170,20);
g.setColor(Color.BLACK);
g.drawString("请按住鼠标左键不放选择截图区",p.x,p.y+15);
//根据东南西北等八个方向决定选中的要修改的X和Y的座标
private void initSelect(States state){
switch(state){
case DEFAULT:
currentX=0;
currentY=0;
case EAST:
currentX=(endX&startX?END_X:START_X);
currentY=0;
case WEST:
currentX=(endX&startX?START_X:END_X);
currentY=0;
case NORTH:
currentX=0;
currentY=(startY&endY?END_Y:START_Y);
case SOUTH:
currentX=0;
currentY=(startY&endY?START_Y:END_Y);
case NORTH_EAST:
currentY=(startY&endY?END_Y:START_Y);
currentX=(endX&startX?END_X:START_X);
case NORTH_WEST:
currentY=(startY&endY?END_Y:START_Y);
currentX=(endX&startX?START_X:END_X);
case SOUTH_EAST:
currentY=(startY&endY?START_Y:END_Y);
currentX=(endX&startX?END_X:START_X);
case SOUTH_WEST:
currentY=(startY&endY?START_Y:END_Y);
currentX=(endX&startX?START_X:END_X);
currentX=0;
currentY=0;
public void mouseMoved(MouseEvent me){
doMouseMoved(me);
initSelect(current);
if(showTip){
p=me.getPoint();
repaint();
//特意定义一个方法处理鼠标移动,是为了每次都能初始化一下所要选择的地区
private void doMouseMoved(MouseEvent me){
if(select.contains(me.getPoint())){
this.setCursor(new Cursor(Cursor.MOVE_CURSOR));
current=States.MOVE;
States[] st=States.values();
for(int i=0;i&rec.i++){
if(rec[i].contains(me.getPoint())){
current=st[i];
this.setCursor(st[i].getCursor());
this.setCursor(cs);
current=States.DEFAULT;
public void mouseExited(MouseEvent me){
public void mouseEntered(MouseEvent me){
public void mouseDragged(MouseEvent me){
int x=me.getX();
int y=me.getY();
if(current==States.MOVE){
startX+=(x-tempX);
startY+=(y-tempY);
endX+=(x-tempX);
endY+=(y-tempY);
}else if(current==States.EAST||current==States.WEST){
if(currentX==START_X){
startX+=(x-tempX);
endX+=(x-tempX);
}else if(current==States.NORTH||current==States.SOUTH){
if(currentY==START_Y){
startY+=(y-tempY);
endY+=(y-tempY);
}else if(current==States.NORTH_EAST||current==States.NORTH_EAST||
current==States.SOUTH_EAST||current==States.SOUTH_WEST){
if(currentY==START_Y){
startY+=(y-tempY);
endY+=(y-tempY);
if(currentX==START_X){
startX+=(x-tempX);
endX+=(x-tempX);
startX=tempX;
startY=tempY;
endX=me.getX();
endY=me.getY();
this.repaint();
public void mousePressed(MouseEvent me){
tempX=me.getX();
tempY=me.getY();
public void mouseReleased(MouseEvent me){
if(me.isPopupTrigger()){
if(current==States.MOVE){
p=me.getPoint();
repaint();
jf.dispose();
updates();
public void mouseClicked(MouseEvent me){
if(me.getClickCount()==2){
//Rectangle rec=new Rectangle(startX,startY,Math.abs(endX-startX),Math.abs(endY-startY));
Point p=me.getPoint();
if(select.contains(p)){
if(select.x+select.width&this.getWidth()&&select.y+select.height&this.getHeight()){
get=bi.getSubimage(select.x,select.y,select.width,select.height);
jf.dispose();
updates();
int wid=select.width,het=select.
if(select.x+select.width&=this.getWidth()){
wid=this.getWidth()-select.x;
if(select.y+select.height&=this.getHeight()){
het=this.getHeight()-select.y;
get=bi.getSubimage(select.x,select.y,wid,het);
jf.dispose();
updates();
public static void main(String args[]){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new CaptureScreen();
//一些表示状态的枚举
enum States{
NORTH_WEST(new Cursor(Cursor.NW_RESIZE_CURSOR)),//表示西北角
NORTH(new Cursor(Cursor.N_RESIZE_CURSOR)),
NORTH_EAST(new Cursor(Cursor.NE_RESIZE_CURSOR)),
EAST(new Cursor(Cursor.E_RESIZE_CURSOR)),
SOUTH_EAST(new Cursor(Cursor.SE_RESIZE_CURSOR)),
SOUTH(new Cursor(Cursor.S_RESIZE_CURSOR)),
SOUTH_WEST(new Cursor(Cursor.SW_RESIZE_CURSOR)),
WEST(new Cursor(Cursor.W_RESIZE_CURSOR)),
MOVE(new Cursor(Cursor.MOVE_CURSOR)),
DEFAULT(new Cursor(Cursor.DEFAULT_CURSOR));
States(Cursor cs){
public Cursor getCursor(){
希望本文所述对大家Java程序设计有所帮助。
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