java实现截屏程序

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;

public class ImgTool {
    private int startX;
    private int startY;
    private int width;
    private int height;
    /**
     * 源路径
     */
    private String srcPath;
    /**
     * 目标路径
     */
    private String tarPath;

    public static void main(String args[]){
        ImgTool imgT = new ImgTool();
        imgT.setStartX(100);
        imgT.setStartY(100);
        imgT.setHeight(200);
        imgT.setWidth(200);
        imgT.setSrcPath("农场.jpg");
        imgT.setTarPath("d:/1.jpg");    
        imgT.cut();
    }
    /**
     * 根据开始坐标，宽度和高度切图。
     * 把图片读入内存缓冲区，然后再
     * 根据具体坐标切取子图最后把子
     * 图按规定的格式存入指定文件
     */
    public void cut(){
        try {
            BufferedImage bufImg = ImageIO.read(new File(srcPath));
            bufImg = bufImg.getSubimage(startX,startY,width,height);
            ImageIO.write(bufImg,"jpg",new File(tarPath));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public int getStartX() {
        return startX;
    }
    public void setStartX(int startX) {
        this.startX = startX;
    }
    public int getStartY() {
        return startY;
    }
    public void setStartY(int startY) {
        this.startY = startY;
    }
    public int getWidth() {
        return width;
    }
    public void setWidth(int width) {
        this.width = width;
    }
    public int getHeight() {
        return height;
    }
    public void setHeight(int height) {
        this.height = height;
    }
    public String getSrcPath() {
        return srcPath;
    }
    public void setSrcPath(String srcPath) {
        this.srcPath = srcPath;
    }
    public String getTarPath() {
        return tarPath;
    }
    public void setTarPath(String tarPath) {
        this.tarPath = tarPath;
    }
}