1.java实现截图并保存到本地
提供给大家三个方法,也是整理的,都不是很难,大家需要的看看哈
2.原理都相似
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package com.credream.ocr;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
/*******************************************************************************
 * 该JavaBean可以直接在其他Java应用程序中调用，实现屏幕的"拍照" This JavaBean is

used to snapshot the
 * GUI in a Java application! You can embeded it in to your java application
 * source code, and us it to snapshot the right GUI of the application
 *
 * @see javax.ImageIO
 * @author liluqun ([email]liluqun@263.net[/email])
 * @version 1.0
 *
 ******************************************************************************/

public class GuiCamera {

private String fileName; // 文件的前缀

private String defaultName = "GuiCamera";

static int serialNum = 0;

private String imageFormat; // 图像文件的格式

private String defaultImageFormat = "jpg";

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

/***************************************************************************
     * 默认的文件前缀为GuiCamera，文件格式为PNG格式 The default construct

will use the default
     * Image file surname "GuiCamera", and default image format "png"

**************************************************************************/
    public GuiCamera() {
        fileName = defaultName;
        imageFormat = defaultImageFormat;

}

/***************************************************************************
     * @param s
     *            the surname of the snapshot file
     * @param format
     *            the format of the image file, it can be "jpg" or "png"
     *            本构造支持JPG和PNG文件的存储

**************************************************************************/
    public GuiCamera(String s, String format) {

fileName = s;
        imageFormat = format;
    }

/***************************************************************************
     * 对屏幕进行拍照 snapShot the Gui once

**************************************************************************/
    public void snapShot() {

try {
            // 拷贝屏幕到一个BufferedImage对象screenshot
            BufferedImage screenshot = (new Robot())
                    .createScreenCapture(new Rectangle(0, 0,
                            (int) d.getWidth(), (int)

d.getHeight()));
            serialNum++;
            // 根据文件前缀变量和文件格式变量，自动生成文件名
            String name = fileName + String.valueOf(serialNum) + "."
                    + imageFormat;
            File f = new File(name);
            System.out.print("Save File " + name);
            // 将screenshot对象写入图像文件
            ImageIO.write(screenshot, imageFormat, f);
            System.out.print("..Finished!\n");
        } catch (Exception ex) {
            System.out.println(ex);
        }
    }

public static void main(String[] args) {
        GuiCamera cam = new GuiCamera("d:\\qq", "bmp");//
        cam.snapShot();
    }
}
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第二种方法:
package com.credream.ocr;

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.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
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.JFrame;
import javax.swing.filechooser.FileSystemView;

/**
 * java截屏
 * 运行后将当前屏幕截取，并最大化显示。
 * 拖拽鼠标，选择自己需要的部分。
 * 按Esc键保存图片到桌面，并退出程序。
 * 点击右上角（没有可见的按钮），退出程序，不保存图片。
 *
 * @author JinCeon
 */
public class SnapshotTest {
    public static void main(String[] args) {
        // 全屏运行
        RectD rd = new RectD();
        GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment()
                .getDefaultScreenDevice();
        gd.setFullScreenWindow(rd);
    }
}
 
class RectD extends JFrame {
    private static final long serialVersionUID = 1L;
    int orgx, orgy, endx, endy;
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    BufferedImage image;
    BufferedImage tempImage;
    BufferedImage saveImage;
    Graphics g;
 
    @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);
    }
 
    public RectD() {
        snapshot();
        setVisible(true);
        // setSize(d);//最大化窗口
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
                orgx = e.getX();
                orgy = e.getY();
            }
        });
        this.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseDragged(MouseEvent e) {
                endx = e.getX();
                endy = e.getY();
                g = getGraphics();
                g.drawImage(tempImage, 0, 0, RectD.this);
                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height为0
                g.setColor(Color.BLUE);
                g.drawRect(x-1, y-1, width+1, height+1);
                //减1，加1都是为了防止图片将矩形框覆盖掉
                saveImage = image.getSubimage(x, y, width, height);
                g.drawImage(saveImage, x, y, RectD.this);
            }
        });
        this.addKeyListener(new KeyAdapter() {
            @Override
            public void keyReleased(KeyEvent e) {
                // 按Esc键退出
                if (e.getKeyCode() == 27) {
                    saveToFile();
                    System.exit(0);
                }
            }
        });
    }
 
    public void saveToFile() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyymmddHHmmss");
        String name = sdf.format(new Date());
        File path = FileSystemView.getFileSystemView().getHomeDirectory();
        String format = "jpg";
        File f = new File(path + File.separator + name + "." + format);
        try {
            ImageIO.write(saveImage, format, f);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    public void snapshot() {
        try {
            Robot robot = new Robot();
            Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
            image = robot.createScreenCapture(new Rectangle(0, 0, d.width,
                    d.height));
        } catch (AWTException e) {
            e.printStackTrace();
        }
    }
}
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第三种方法:
package com.credream.robotExp;

import java.awt.AWTException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class RobotExp {
public static void main(String[] args) {
try {
Robot robot = new Robot();
BufferedImage bi=robot.createScreenCapture(new Rectangle(900,800)); // 根据指定的

区域(1300,800)抓取屏幕的指定区域
ImageIO.write(bi, "jpg", new File("D:/imageTest.jpg")); //把抓取到的内容写入到一

个jpg文件中
} catch (AWTException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
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三种方法,大致相同,只不过加了些额外的方法,功能而已;都挺简单就不多说了...