网上看到一个JAVA截图工具，有空研究一下
package org.apache.log4j;/*作者:泡沫地址:http://hi.baidu.com/av51功能:用于截取图片,方便快捷!mail:yuhuidog#163.com (注意:其中#为@)*/import java.awt.AWTException;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Color;import java.awt.Cursor;import java.awt.Dimension;import java.awt.FileDialog;import java.awt.Frame;import java.awt.Graphics;import java.awt.Image;import java.awt.Panel;import java.awt.Point;import java.awt.Rectangle;import java.awt.Robot;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;public class AWTpicture extends Frame implements MouseListener,MouseMotionListener,ActionListener{ private int firstX,firstY,frameWidth,frameHeight; private int firstWith,firstHeight,firstPointx,firstPointy; private BufferedImage bi,sbi,original; private Robot robot; private Rectangle rectangle; private Rectangle rectangleCursor,rectangleCursorUp,rectangleCursorDown,rectangleCursorLeft,rectangleCursorRight; private Rectangle rectangleCursorRU,rectangleCursorRD,rectangleCursorLU,rectangleCursorLD; private Image bis; private Dimension dimension; private Button button,button2,clearButton; private Point[] point=new Point[3]; private int width,height; private int nPoints=5; private Panel panel; private boolean drawHasFinish=false,change=false; private int changeFirstPointX,changeFirstPointY,changeWidth,changeHeight; private boolean changeUP=false,changeDOWN=false,changeLEFT=false,changeRIGHT=false,changeRU=false,changeRD=false,changeLU=false,changeLD=false; private boolean clearPicture=false,redraw=false; private FileDialog fileDialog; private AWTpicture(){ //取得屏幕大小 dimension=Toolkit.getDefaultToolkit().getScreenSize(); frameWidth=dimension.width; frameHeight=dimension.height; fileDialog=new FileDialog(this,"泡沫截图",FileDialog.SAVE); rectangle=new Rectangle(frameWidth,frameHeight); panel=new Panel(); button=new Button("退出"); button.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); button.setBackground(Color.green); button2=new Button("截取"); button2.setBackground(Color.darkGray); button2.addActionListener(new MyTakePicture(this)); button2.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); button.addActionListener(this); clearButton=new Button("重绘"); clearButton.setBackground(Color.green); clearButton.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); clearButton.addActionListener(new MyClearPicture(this)); panel.setLayout(new BorderLayout()); panel.add(clearButton, BorderLayout.SOUTH); panel.add(button, BorderLayout.NORTH); panel.add(button2, BorderLayout.CENTER); try { robot=new Robot(); } catch (AWTException e) { e.printStackTrace(); } //截取全屏 bi=robot.createScreenCapture(rectangle); original=bi; this.setSize(frameWidth,frameHeight); this.setUndecorated(true); this.addMouseListener(this); this.addMouseMotionListener(this); this.add(panel,BorderLayout.EAST); this.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR)); this.setVisible(true); this.repaint(); } public static void main(String[] args){ new AWTpicture(); } public void paint(Graphics g) { this.drawR(g); } //缓存图片 public void update(Graphics g){ if(bis==null){ bis=this.createImage(frameWidth, frameHeight); } Graphics ga=bis.getGraphics(); Color c=ga.getColor(); ga.setColor(Color.black); ga.fillRect(0, 0, frameWidth, frameHeight); ga.setColor(c); paint(ga); g.drawImage(bis, 0, 0, frameWidth, frameHeight, null); } public void mouseClicked(MouseEvent e) { } public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub } public void mouseReleased(MouseEvent e) { if(!drawHasFinish){ if(point[1].x<point[2].x && point[1].y<point[2].y){ firstPointx=point[1].x; firstPointy=point[1].y; } if(point[1].x>point[2].x && point[1].y<point[2].y){ firstPointx=point[2].x; firstPointy=point[1].y; } if(point[1].x<point[2].x && point[1].y>point[2].y){ firstPointx=point[1].x; firstPointy=point[2].y; } if(point[1].x>point[2].x && point[1].y>point[2].y){ firstPointx=point[2].x; firstPointy=point[2].y; } changeFirstPointX=firstPointx; changeFirstPointY=firstPointy; if(point[1]!=null && point[2]!=null ){ rectangleCursorUp=new Rectangle(firstPointx+20,firstPointy-10,width-40,20); rectangleCursorDown=new Rectangle(firstPointx+20,firstPointy+height-10,width-40,20); rectangleCursorLeft=new Rectangle(firstPointx-10,firstPointy+10,20,height-20); rectangleCursorRight=new Rectangle(firstPointx+width-10,firstPointy+10,20,height-20); rectangleCursorLU=new Rectangle(firstPointx-10,firstPointy-10,30,20); rectangleCursorLD=new Rectangle(firstPointx-10,firstPointy+height-10,30,20); rectangleCursorRU=new Rectangle(firstPointx+width-10,firstPointy-10,20,20); rectangleCursorRD=new Rectangle(firstPointx+width-10,firstPointy+height-10,20,20); drawHasFinish=true; } } //确定每边能改变大小的矩形 if(drawHasFinish){ rectangleCursorUp=new Rectangle(changeFirstPointX+20,changeFirstPointY-10,changeWidth-40,20); rectangleCursorDown=new Rectangle(changeFirstPointX+20,changeFirstPointY+changeHeight-10,changeWidth-40,20); rectangleCursorLeft=new Rectangle(changeFirstPointX-10,changeFirstPointY+10,20,changeHeight-20); rectangleCursorRight=new Rectangle(changeFirstPointX+changeWidth-10,changeFirstPointY+10,20,changeHeight-20); rectangleCursorLU=new Rectangle(changeFirstPointX-2,changeFirstPointY-2,10,10); rectangleCursorLD=new Rectangle(changeFirstPointX-2,changeFirstPointY+changeHeight-2,10,10); rectangleCursorRU=new Rectangle(changeFirstPointX+changeWidth-2,changeFirstPointY-2,10,10); rectangleCursorRD=new Rectangle(changeFirstPointX+changeWidth-2,changeFirstPointY+changeHeight-2,10,10); } } public void mouseDragged(MouseEvent e) { point[2]=e.getPoint(); //if(!drawHasFinish){ this.repaint(); // } //托动鼠标移动大小 if(change){ if(changeUP){ changeHeight=changeHeight+changeFirstPointY-e.getPoint().y; changeFirstPointY=e.getPoint().y; } if(changeDOWN){ changeHeight=e.getPoint().y-changeFirstPointY; } if(changeLEFT){ changeWidth=changeWidth+changeFirstPointX-e.getPoint().x; changeFirstPointX=e.getPoint().x; } if(changeRIGHT){ changeWidth=e.getPoint().x-changeFirstPointX; } if(changeLU){ changeWidth=changeWidth+changeFirstPointX-e.getPoint().x; changeHeight=changeHeight+changeFirstPointY-e.getPoint().y; changeFirstPointX=e.getPoint().x; changeFirstPointY=e.getPoint().y; } if(changeLD){ changeWidth=changeWidth+changeFirstPointX-e.getPoint().x; changeHeight=e.getPoint().y-changeFirstPointY; changeFirstPointX=e.getPoint().x; } if(changeRU){ changeWidth=e.getPoint().x-changeFirstPointX; changeHeight=changeHeight+changeFirstPointY-e.getPoint().y; changeFirstPointY=e.getPoint().y; } if(changeRD){ changeWidth=e.getPoint().x-changeFirstPointX; changeHeight=e.getPoint().y-changeFirstPointY; } this.repaint(); } } public void mouseMoved(MouseEvent e) { point[1]=e.getPoint(); //改变鼠标的形状 if(rectangleCursorUp!=null && rectangleCursorUp.contains(point[1])){ this.setCursor(new Cursor(Cursor.N_RESIZE_CURSOR)); change=true; changeUP=true; }else if(rectangleCursorDown!=null && rectangleCursorDown.contains(point[1])){ this.setCursor(new Cursor(Cursor.S_RESIZE_CURSOR)); change=true; changeDOWN=true; }else if(rectangleCursorLeft!=null && rectangleCursorLeft.contains(point[1])){ this.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR)); change=true; changeLEFT=true; }else if(rectangleCursorRight!=null && rectangleCursorRight.contains(point[1]) ){ this.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR)); change=true; changeRIGHT=true; }else if(rectangleCursorLU !=null && rectangleCursorLU.contains(point[1])){ this.setCursor(new Cursor(Cursor.NW_RESIZE_CURSOR)); change=true; changeLU=true; }else if(rectangleCursorLD !=null && rectangleCursorLD.contains(point[1])){ this.setCursor(new Cursor(Cursor.SW_RESIZE_CURSOR)); change=true; changeLD=true; }else if(rectangleCursorRU!=null && rectangleCursorRU.contains(point[1])){ this.setCursor(new Cursor(Cursor.NE_RESIZE_CURSOR)); change=true; changeRU=true; }else if(rectangleCursorRD!=null && rectangleCursorRD.contains(point[1])){ this.setCursor(new Cursor(Cursor.SE_RESIZE_CURSOR)); change=true; changeRD=true; }else{ this.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR)); changeUP=false;changeDOWN=false;changeRIGHT=false;changeLEFT=false;changeRU=false; changeRD=false;changeLU=false;changeLD=false; } redraw=false; } public void actionPerformed(ActionEvent e) { System.exit(0); } class MyTakePicture implements ActionListener{ AWTpicture aWTpicture; MyTakePicture(AWTpicture aWTpicture){ this.aWTpicture=aWTpicture; } //保存图片 public void actionPerformed(ActionEvent e) { fileDialog.setVisible(true); if(changeWidth>0){ sbi=bi.getSubimage(changeFirstPointX,changeFirstPointY,changeWidth,changeHeight); File file=new File(fileDialog.getDirectory()); file.mkdir(); try { ImageIO.write(sbi, "jpeg",new File(file,fileDialog.getFile()+".jpg") ); } catch (IOException e1) { e1.printStackTrace(); } } } } class MyClearPicture implements ActionListener{ AWTpicture aWTpicture; MyClearPicture(AWTpicture aWTpicture){ this.aWTpicture=aWTpicture; } public void actionPerformed(ActionEvent e) { drawHasFinish=false; change=false; redraw=true; rectangleCursorUp=null; rectangleCursorDown=null; rectangleCursorLeft=null; rectangleCursorRight=null; rectangleCursorRU=null; rectangleCursorRD=null; rectangleCursorLU=null; rectangleCursorLD=null; changeWidth=0; changeHeight=0; aWTpicture.repaint(); } } public void drawR(Graphics g){ g.drawImage(bi, 0,0,frameWidth,frameHeight, null); if(point[1]!=null &&point[2]!=null &&!drawHasFinish && !redraw){ int[] xPoints={point[1].x,point[2].x,point[2].x,point[1].x,point[1].x}; int[] yPoints={point[1].y,point[1].y,point[2].y,point[2].y,point[1].y}; width=(point[2].x-point[1].x)>0?(point[2].x-point[1].x):(point[1].x-point[2].x); height=(point[2].y-point[1].y)>0?(point[2].y-point[1].y):(point[1].y-point[2].y); changeWidth=width; changeHeight=height; Color c=g.getColor(); g.setColor(Color.red); g.drawString(width+"*"+height, point[1].x, point[1].y-5); //画点 /*int i; if()*/ if(point[1].x<point[2].x && point[1].y<point[2].y){ firstPointx=point[1].x; firstPointy=point[1].y; } if(point[1].x>point[2].x && point[1].y<point[2].y){ firstPointx=point[2].x; firstPointy=point[1].y; } if(point[1].x<point[2].x && point[1].y>point[2].y){ firstPointx=point[1].x; firstPointy=point[2].y; } if(point[1].x>point[2].x && point[1].y>point[2].y){ firstPointx=point[2].x; firstPointy=point[2].y; } g.fillRect(firstPointx-2,firstPointy-2 , 5,5); g.fillRect(firstPointx+(width)/2,firstPointy-2 , 5,5); g.fillRect(firstPointx+width-2,firstPointy-2 , 5,5); g.fillRect(firstPointx+width-2,firstPointy+ height/2-2, 5,5); g.fillRect(firstPointx+width-2,firstPointy+height-2, 5,5); g.fillRect(firstPointx+(width)/2,firstPointy+height-2, 5,5); g.fillRect(firstPointx-2,firstPointy+height-2, 5,5); g.fillRect(firstPointx-2,firstPointy+ height/2-2, 5,5); //画矩形 //g.drawString("fafda", point[1].x-100, point[1].y-5); g.drawPolyline(xPoints, yPoints, nPoints); } if(change){ g.setColor(Color.red); g.drawString(changeWidth+"*"+changeHeight, changeFirstPointX, changeFirstPointY-5); g.fillRect(changeFirstPointX-2,changeFirstPointY-2 , 5,5); g.fillRect(changeFirstPointX+(changeWidth)/2,changeFirstPointY-2 , 5,5); g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY-2 , 5,5); g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY+ changeHeight/2-2, 5,5); g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY+changeHeight-2, 5,5); g.fillRect(changeFirstPointX+(changeWidth)/2,changeFirstPointY+changeHeight-2, 5,5); g.fillRect(changeFirstPointX-2,changeFirstPointY+changeHeight-2, 5,5); g.fillRect(changeFirstPointX-2,changeFirstPointY+ changeHeight/2-2, 5,5); g.drawRect(changeFirstPointX, changeFirstPointY, changeWidth, changeHeight); } } }