有些时候截屏是很有必要的,可是不可能每次都开着QQ在那里截吧,也不可能按print sreen键,再后把整个桌面都截下来吧,这个时候,有一个自己的截屏程序是很有必要的,并且可以自己截成任意大小,任意位置.用法和当时QQ的截屏差不多.可以选区拖动,缩放选区,双击保存,右键选区是取消选区,右键别的地方是退出截屏程序.
/*
* CaptureScreen.java
*
* Created on 2006年9月7日, 上午10:59
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package test1;
/**
*
* @author lbf
*/
import java.awt.*;
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,save;
private JPanel c;
private BufferedImage get;
/** Creates a new instance of CaptureScreen */
public CaptureScreen() {
super("屏幕截取软件");
initWindow();
}
private void initWindow(){
start=new JButton("开始截取");
cancel=new JButton("退出");
save=new JButton("保存");
save.setEnabled(false);
save.addActionListener(this);
start.addActionListener(this);
cancel.addActionListener(this);
JPanel buttonJP=new JPanel();
c=new JPanel(new BorderLayout());
JLabel jl=new JLabel("屏幕截取",JLabel.CENTER);
JLabel jl1=new JLabel("作者：千里冰封",JLabel.CENTER);
jl.setFont(new Font("黑体",Font.BOLD,40));
jl1.setFont(new Font("宋体",Font.BOLD,20));
jl.setForeground(Color.RED);
jl1.setForeground(Color.BLUE);
c.add(jl,BorderLayout.CENTER);
c.add(jl1,BorderLayout.SOUTH);
buttonJP.add(start);
buttonJP.add(save);
buttonJP.add(cancel);
this.getContentPane().add(c,BorderLayout.CENTER);
this.getContentPane().add(buttonJP,BorderLayout.SOUTH);
this.setSize(300,300);
this.setLocationRelativeTo(null);
this.setVisible(true);
this.setAlwaysOnTop(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private void updates(){
if(get!=null){
ImageIcon ii=new ImageIcon(get);
JLabel jl=new JLabel(ii);
c.removeAll();
c.add(new JScrollPane(jl),BorderLayout.CENTER);
SwingUtilities.updateComponentTreeUI(this);
}
}
private void doStart(){
try{
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();
jf.getContentPane().add(new Temp(jf,bi,di.width,di.height));
jf.setUndecorated(true);
jf.setSize(di);
jf.setVisible(true);
jf.setAlwaysOnTop(true);
} catch(Exception exe){
exe.printStackTrace();
}
}
private void doSave(){
try{
JFileChooser jfc=new JFileChooser(".");
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){
if(!ext.endsWith(".jpg")){
String ns=ext+".jpg";
file=new File(ns);
about="JPG";
}
} else if(ff instanceof PNGfilter){
if(!ext.endsWith(".png")){
String ns=ext+".png";
file=new File(ns);
about="PNG";
}
}
if(ImageIO.write(get,about,file)){
JOptionPane.showMessageDialog(this,"保存成功！");
save.setEnabled(false);
} else
JOptionPane.showMessageDialog(this,"保存失败！");
}
} catch(Exception exe){
exe.printStackTrace();
}
}
public void actionPerformed(ActionEvent ae){
if(ae.getSource()==start){
doStart();
} else if(ae.getSource()==cancel){
System.exit(0);
} else if(ae.getSource()==save){
doSave();
}
}
//一个文件后缀名选择器
private class JPGfilter extends javax.swing.filechooser.FileFilter{
public JPGfilter(){
}
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".jpg")||
file.toString().toLowerCase().endsWith(".jpeg")||
file.isDirectory()){
return true;
} else
return false;
}
public String getDescription(){
return "*.JPG,*.JPEG(JPG,JPEG图像)";
}
}
private class PNGfilter extends javax.swing.filechooser.FileFilter{
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".png")||
file.isDirectory()){
return true;
} else
return false;
}
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 BufferedImage bi;
private int width,height;
private int startX,startY,endX,endY,tempX,tempY;
private JFrame jf;
private Rectangle select=new Rectangle(0,0,0,0);//表示选中的区域
private Cursor cs;//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[] rec;//表示八个编辑点的区域
public Temp(JFrame jf,BufferedImage bi,int width,int height){
this.jf=jf;
this.bi=bi;
this.width=width;
this.height=height;
this.addMouseListener(this);
this.addMouseMotionListener(this);
Image icon=Toolkit.getDefaultToolkit().createImage(this.getClass().getResource("icon.png"));
cs=Toolkit.getDefaultToolkit().createCustomCursor(icon,new Point(0,0),"icon");
this.setCursor(cs);
initRecs();
}
private void initRecs(){
rec=new Rectangle[8];
for(int i=0;i<rec.length;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);
}
public void mouseMoved(MouseEvent me){
if(select.contains(me.getPoint())){
this.setCursor(new Cursor(Cursor.MOVE_CURSOR));
current=States.MOVE;
} else{
States[] st=States.values();
for(int i=0;i<rec.length;i++){
if(rec[i].contains(me.getPoint())){
current=st[i];
this.setCursor(st[i].getCursor());
return;
}
}
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);
tempX=x;
tempY=y;
}else if(current==States.EAST){
if(startX>endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
}else if(current==States.NORTH){
if(startY<endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
}else if(current==States.WEST){
if(startX<endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
}else if(current==States.SOUTH){
if(startY>endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
} else if(current==States.NORTH_EAST){
if(startX>endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
if(startY<endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
}else if(current==States.NORTH_WEST){
if(startX<endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
if(startY<endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
}else if(current==States.SOUTH_EAST){
if(startY>endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
if(startX>endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
}else if(current==States.SOUTH_WEST){
if(startY>endY){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
if(startX<endX){
startX+=(x-tempX);
tempX=x;
} else{
endX+=(x-tempX);
tempX=x;
}
}
else{
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){
startX=0;
startY=0;
endX=0;
endY=0;
repaint();
} else{
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();
save.setEnabled(true);
updates();
}else{
int wid=select.width,het=select.height;
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();
save.setEnabled(true);
updates();
}
}
}
}
}
public static void main(String args[]){
new CaptureScreen();
}
}
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));
private Cursor cs;
States(Cursor cs){
this.cs=cs;
}
public Cursor getCursor(){
return cs;
}
}
尽管千里冰封
依然拥有晴空
你我共同品味JAVA的浓香.
posted on 2007-08-30 10:31
千里冰封 阅读(2031)
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