Java實現簡單的截圖工具
Robot.rar ~ 116KB
ScreenShot.java ~ 420B
package Robot_Caputer;
import java.awt.AWTException;
import java.awt.EventQueue;
public class ScreenShot {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try{
ScreenShotWindow ssw=new ScreenShotWindow();
ssw.setVisible(true);
}catch(AWTException e){
e.printStackTrace();
}
}
});
}
}
[文件] ScreenShotWindow.java ~ 5KB (13)
package Robot_Caputer;
import images.*;
import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import javax.swing.JWindow;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.filechooser.FileSystemView;
//Jwindow 也是四大頂級組件之一，地位等同于JFrame，是一個無標題欄的窗口
public class ScreenShotWindow extends JWindow {
/**
*
*/
private static final long serialVersionUID = 1L;
private int orgx,orgy,endx,endy;
/**image的作用:
* 1.獲取整個屏幕的截圖*/
private BufferedImage image=null;
private BufferedImage tempImage=null;
private BufferedImage saveImage=null;
private ToolsWindow tools=null;
public ScreenShotWindow() throws AWTException {
//獲取默認屏幕設備
GraphicsEnvironment environment=GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice screen=environment.getDefaultScreenDevice();
//獲取屏幕尺寸
Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
this.setBounds(0, 0, d.width, d.height);
//獲取屏幕截圖
Robot robot=new Robot(screen);
// Robot robot=new Robot();
// image=new BufferedImage((int)d.getWidth(),(int)d.getHeight(),BufferedImage.TYPE_4BYTE_ABGR);
image=robot.createScreenCapture(new Rectangle(0, 0, d.width, d.height));
//設置鼠標敲擊的時間監聽
this.addMouseListener(new MouseAdapter() {
//鼠標按下的事件監聽
@Override
public void mousePressed(MouseEvent e) {
//
orgx=e.getX();
orgy=e.getY();
if(tools!=null){
tools.setVisible(false);
}
}
//鼠標抬起的事件監聽
@Override
public void mouseReleased(MouseEvent e) {
if(tools==null){
tools=new ToolsWindow(ScreenShotWindow.this,e.getX(),e.getY());
}else{
tools.setLocation(e.getX(), e.getY());
}
tools.setVisible(true);
tools.toFront();
}
});
//對于鼠標移動的監聽
this.addMouseMotionListener(new MouseMotionAdapter() {
//鼠標滑動的監聽
//在滑動過程中會被反復調用
@Override
public void mouseDragged(MouseEvent e) {
endx=e.getX();
endy=e.getY();
//臨時圖像，用于緩沖屏幕區域放置屏幕閃爍
Image tempImage2=createImage(ScreenShotWindow.this.getWidth(),ScreenShotWindow.this.getHeight());
//用于繪圖
Graphics g=tempImage2.getGraphics();
g.drawImage(tempImage, 0, 0,null);
int x=Math.min(orgx, endx);
int y=Math.min(orgy, endy);
int width=Math.abs(endx-orgx)+1;
int height=Math.abs(endy-orgy)+1;
g.setColor(Color.RED);
//保證圖片矩形不被邊框覆蓋
g.drawRect(x-1, y-1, width+1, height+1);
//getSubimage(int x,int y,int w,int h)用于返回規定位置中的矩形圖像到BufferedImag對象中
saveImage=image.getSubimage(x, y, width, height);
//用于畫當前圖像中的可用圖像
g.drawImage(saveImage, x, y, null);
ScreenShotWindow.this.getGraphics().drawImage(tempImage2,
0, 0,ScreenShotWindow.this);
}
});
}
//重寫了繪畫的方法
@Override
public void paint(Graphics g) {
//new RescaleOp(float[] scaleFactors, float[] offsets, RenderingHints hints)
//構造一個具有所希望的縮放因子和偏移量的新 RescaleOp。
//RescaleOp 是有關圖像縮放的類
//RescaleOp.filter(BufferedImage src,BufferedImage dest)
//用于對源圖像src進行縮放
RescaleOp ro=new RescaleOp(0.8f,0, null);
tempImage=ro.filter(image, null);
g.drawImage(tempImage, 0, 0, this);
}
//保存圖像到文件
public void saveImage() throws IOException{
JFileChooser jfc=new JFileChooser();
jfc.setDialogTitle("保存");
//文件過濾器，用戶過濾可選擇的文件
FileNameExtensionFilter filter=new FileNameExtensionFilter("JPG", "jpg");
jfc.setFileFilter(filter);
//初始化一個默認文件(此文件會生成在桌面)
SimpleDateFormat sdf=new SimpleDateFormat("yyyymmddHHmmss");
String filename=sdf.format(new Date());
File filePath=FileSystemView.getFileSystemView().getHomeDirectory();
File defaultFile=new File(filePath+File.separator+filename+".jpg");
jfc.setSelectedFile(defaultFile);
int flag=jfc.showSaveDialog(this);
if(flag==JFileChooser.APPROVE_OPTION){
File file=jfc.getSelectedFile();
String path=file.getPath();
//檢查文件后綴，放置用戶忘記輸入后綴或輸入不正確的后綴
if(!(path.endsWith(".jpg")||path.endsWith("JPG"))){
path+=".jpg";
}
//寫入文件
ImageIO.write(saveImage, "jpg", new File(path));
System.exit(0);
}
}
}
[文件] ToolsWindow.java ~ 1KB
package Robot_Caputer;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOError;
import java.io.IOException;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JToolBar;
import javax.swing.JWindow;
public class ToolsWindow extends JWindow{
/**
*
*/
private static final long serialVersionUID = 1L;
private ScreenShotWindow parent;
public ToolsWindow(ScreenShotWindow parent,int x,int y) {
this.parent=parent;
this.init();
//將組件移到(x,y)的位置
this.setLocation(x, y);
//調整窗口的大小來適應控件
this.pack();
this.setVisible(true);
}
private void init() {
this.setLayout(new BorderLayout());
JToolBar toolBar=new JToolBar("Java截圖");
//保存按鈕
JButton saveButton=new JButton(new ImageIcon("src/images/SaveIcon.gif"));
saveButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try{
parent.saveImage();
}catch(IOException ex1){
ex1.printStackTrace();
}
}
});
toolBar.add(saveButton);
//關閉按鈕
JButton closedButton=new JButton(new ImageIcon("src/images/closedIcon.gif"));
closedButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
toolBar.add(closedButton);
this.add(toolBar, BorderLayout.NORTH);
}
}
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