java实现区域内屏幕截图示例

这篇文章主要介绍了java截图示例,需要的朋友可以参考下

这是一个java版的截图程序

复制代码代码如下:

package com.hongyuan.test;import java.awt.AWTException;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.EventQueue;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.Image;

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.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.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.JToolBar;

import javax.swing.JWindow;

import javax.swing.filechooser.FileNameExtensionFilter;

import javax.swing.filechooser.FileSystemView;

public class ScreenShottest {

public static void main(String[] args) {

EventQueue.invokelater(new Runnable() {

@Override

public void run() {

try {

ScreenShotwindow ssw=new ScreenShotwindow();

ssw.setVisible(true);

} catch (AWTException e) {

e.printstacktrace();

}

});

}

* 截图窗口

class ScreenShotwindow extends JWindow

{

private int orgx, orgy, endx, endy;

private BufferedImage image=null;

private BufferedImage tempImage=null;

private BufferedImage saveImage=null;

private ToolsWindow tools=null;

public ScreenShotwindow() throws AWTException{

//获取屏幕尺寸

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

this.setBounds(0, 0, d.width, d.height);

//截取屏幕

Robot robot = new Robot();

image = robot.createScreenCapture(new Rectangle(0, 0, d.width,d.height));

this.addMouseListener(new MouseAdapter() {

@Override

public void mousepressed(MouseEvent e) {

//鼠标松开时记录结束点坐标，并隐藏操作窗口

orgx = e.getX();

orgy = e.getY();

if(tools!=null){

tools.setVisible(false);

}

@Override

public void mouseReleased(MouseEvent e) {

//鼠标松开时，显示操作窗口

if(tools==null){

tools=new ToolsWindow(ScreenShotwindow.this,e.getX(),e.getY());

}else{

tools.setLocation(e.getX(),e.getY());

}

tools.setVisible(true);

tools.toFront();

}

});

this.addMouseMotionListener(new MouseMotionAdapter() {

@Override

public void mouseDragged(MouseEvent e) {

//鼠标拖动时，记录坐标并重绘窗口

endx = e.getX();

endy = e.getY();

//临时图像，用于缓冲屏幕区域放置屏幕闪烁

Image tempImage2=createImage(ScreenShotwindow.this.getWidth(),ScreenShotwindow.this.getHeight());

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;

// 加上1防止width或height0

g.setColor(Color.BLUE);

g.drawRect(x-1, y-1, width+1, height+1);

//减1加1都了防止图片矩形框覆盖掉

saveImage = image.getSubimage(x, y, width, height);

g.drawImage(saveImage, x, y, null);

ScreenShotwindow.this.getGraphics().drawImage(tempImage2,0,0,ScreenShotwindow.this);

}

});

}

@Override

public void paint(Graphics g) {

RescaleOp ro = new RescaleOp(0.8f, 0, null);

tempImage = ro.filter(image, null);

g.drawImage(tempImage, 0, 0, this);

}

//保存图像到文件

public void saveImage() throws IOException {

JFileChooser jfc=new JFileChooser();

jfc.setDialogTitle("保存");

//文件过滤器，用户过滤可选择文件

FileNameExtensionFilter filter = new FileNameExtensionFilter("JPG", "jpg");

jfc.setFileFilter(filter);

//初始化一个默认文件（此文件会生成到桌面上）

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();

//检查文件后缀，放置用户忘记输入后缀或者输入不正确的后缀

if(!(path.endsWith(".jpg")||path.endsWith(".JPG"))){

path+=".jpg";

}

//写入文件

ImageIO.write(saveImage,"jpg",new File(path));

System.exit(0);

}

* 操作窗口

class ToolsWindow extends JWindow

{

private ScreenShotwindow parent;

public ToolsWindow(ScreenShotwindow parent,int x,int y) {

this.parent=parent;

this.init();

this.setLocation(x, y);

this.pack();

this.setVisible(true);

}

private void init(){

this.setLayout(new BorderLayout());

JToolBar toolBar=new JToolBar("Java 截图");

//保存按钮

JButton saveButton=new JButton(new ImageIcon("images/save.gif"));

saveButton.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

try {

parent.saveImage();

} catch (IOException e1) {

e1.printstacktrace();

}

});

toolBar.add(saveButton);

//关闭按钮

JButton closeButton=new JButton(new ImageIcon("images/close.gif"));

closeButton.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

toolBar.add(closeButton);

this.add(toolBar,BorderLayout.norTH);

}

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