java实现截图并保存到本地

1.java实现截图并保存到本地

提供给大家三个方法,随意整理的

2.方法一：

 

1.  
   package com.credream.ocr;
2.  
    
3.  
   import java.awt.Dimension;
4.  
   import java.awt.Rectangle;
5.  
   import java.awt.Robot;
6.  
   import java.awt.Toolkit;
7.  
   import java.awt.image.BufferedImage;
8.  
   import java.io.File;
9.  
    
10.  
    import javax.imageio.ImageIO;
11.  
     
12.  
    public class GuiCamera {
13.  
    private String fileName;
14.  
    private String defaultName="GuiCamera";
15.  
    static int serialNum=0;
16.  
    private String imageFormat;//图像文件的格式
17.  
    private String defaultImageFormat="jpg";
18.  
    Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
19.  
     
20.  
    public GuiCamera(){
21.  
    fileName=defaultName;
22.  
    imageFormat=defaultImageFormat;
23.  
    }
24.  
     
25.  
    public GuiCamera(String s,String format) {
26.  
    fileName=s;
27.  
    imageFormat=format;
28.  
    }
29.  
    /**
30.  
    * 对屏幕进行拍照
31.  
    *
32.  
    * **/
33.  
    public void snapshot(){
34.  
    try {
35.  
    //拷贝屏幕到一个BufferedImage对象screenshot
36.  
    BufferedImage screenshot=(new Robot()).createScreenCapture(
37.  
    new Rectangle(0,0,(int)d.getWidth(),(int)d.getHeight()));
38.  
    serialNum++;
39.  
    //根据文件前缀变量和文件格式变量，自动生成文件名
40.  
    String name=fileName+String.valueOf(serialNum)+"."+imageFormat;
41.  
    System.out.println(name);
42.  
    File f=new File(name);
43.  
    System.out.println("Save File-"+name);
44.  
    //将screenshot对象写入图像文件
45.  
    ImageIO.write(screenshot, imageFormat, f);
46.  
    System.out.println("..Finished");
47.  
     
48.  
    } catch (Exception e) {
49.  
    System.out.println(e);
50.  
    }
51.  
    }
52.  
    public static void main(String[] args) {
53.  
    //"C:\\sally\\bootstrap栅格"是根据自己随意找的一个图片形式，"png"是图片的格式
54.  
    GuiCamera cam=new GuiCamera("C:\\sally\\bootstrap栅格","png");
55.  
    cam.snapshot();
56.  
    }
57.  
    }

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3.方法二：

 

1.  
   package com.credream.ocr;
2.  
    
3.  
   import java.awt.AWTException;
4.  
   import java.awt.Color;
5.  
   import java.awt.Dimension;
6.  
   import java.awt.Graphics;
7.  
   import java.awt.GraphicsDevice;
8.  
   import java.awt.GraphicsEnvironment;
9.  
   import java.awt.Rectangle;
10.  
    import java.awt.Robot;
11.  
    import java.awt.Toolkit;
12.  
    import java.awt.event.KeyAdapter;
13.  
    import java.awt.event.KeyEvent;
14.  
    import java.awt.event.MouseAdapter;
15.  
    import java.awt.event.MouseEvent;
16.  
    import java.awt.event.MouseMotionAdapter;
17.  
    import java.awt.image.BufferedImage;
18.  
    import java.awt.image.RescaleOp;
19.  
    import java.io.File;
20.  
    import java.io.IOException;
21.  
    import java.text.SimpleDateFormat;
22.  
    import java.util.Date;
23.  
     
24.  
    import javax.imageio.ImageIO;
25.  
    import javax.swing.JFrame;
26.  
    import javax.swing.filechooser.FileSystemView;
27.  
     
28.  
    class RectD extends JFrame{
29.  
     
30.  
    private static final long serialVersionUID = 1L;
31.  
    int orgx,orgy,endx,endy;
32.  
    Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
33.  
    BufferedImage image;
34.  
    BufferedImage tempImage;
35.  
    BufferedImage saveImage;
36.  
    Graphics g;
37.  
     
38.  
    @Override
39.  
    public void paint(Graphics g) {
40.  
    //缩放因子和偏移量
41.  
    RescaleOp ro=new RescaleOp(0.8f, 0, null);
42.  
    tempImage=ro.filter(image, null);
43.  
    g.drawImage(tempImage, 0, 0,this);
44.  
    }
45.  
     
46.  
    public RectD(){
47.  
    snapshot();
48.  
    setVisible(true);
49.  
    //setSize(d);//最大化窗口
50.  
    setDefaultCloseOperation(EXIT_ON_CLOSE);
51.  
     
52.  
    this.addMouseListener(new MouseAdapter(){
53.  
    public void mousePressed(MouseEvent e){
54.  
    orgx=e.getX();
55.  
    orgy=e.getY();
56.  
    }
57.  
    });
58.  
    //鼠标运动监听器
59.  
    this.addMouseMotionListener(new MouseMotionAdapter() {
60.  
    //鼠标拖拽事件
61.  
    public void mouseDragged(MouseEvent e) {
62.  
    endx=e.getX();
63.  
    endy=e.getY();
64.  
    g=getGraphics();
65.  
    g.drawImage(tempImage, 0, 0, RectD.this);
66.  
    int x=Math.min(orgx, endx);
67.  
    int y=Math.min(orgy,endy);
68.  
    //加上1，防止width,height为0
69.  
    int width=Math.abs(endx-orgx)+1;
70.  
    int height=Math.abs(endy-orgy)+1;
71.  
    g.setColor(Color.BLUE);
72.  
    g.drawRect(x-1, y-1, width+1, height+1);
73.  
    //减1，加1都是为了防止图片将矩形框覆盖掉
74.  
    saveImage=image.getSubimage(x, y, width, height);
75.  
    g.drawImage(saveImage, x, y,RectD.this);
76.  
    }
77.  
    });
78.  
     
79.  
    this.addKeyListener(new KeyAdapter() {
80.  
    @Override
81.  
    //按键释放
82.  
    public void keyReleased(KeyEvent e){
83.  
    //按Esc键退出
84.  
    if(e.getKeyCode()==27){
85.  
    saveToFile();
86.  
    System.exit(0);
87.  
    }
88.  
    }
89.  
    });
90.  
    }
91.  
    public void saveToFile(){
92.  
    SimpleDateFormat sdf=new SimpleDateFormat("yyyymmddHHmmss");
93.  
    String name=sdf.format(new Date());
94.  
    File path=FileSystemView.getFileSystemView().getHomeDirectory();
95.  
    String format="jpg";
96.  
    File f=new File(path+File.separator+name+"."+format);
97.  
    try {
98.  
    ImageIO.write(saveImage, format, f);
99.  
    } catch (IOException e) {
100.  
     e.printStackTrace();
101.  
     }
102.  
     }
103.  
      
104.  
     public void snapshot(){
105.  
      
106.  
     try {
107.  
     Robot robot= new Robot();
108.  
     Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
109.  
     image=robot.createScreenCapture(new Rectangle(0,0,d.width,d.height));
110.  
      
111.  
     } catch (AWTException e) {
112.  
     e.printStackTrace();
113.  
     }
114.  
     }
115.  
      
116.  
     public static void main(String[] args) {
117.  
     //全屏运行
118.  
     RectD rd = new RectD();
119.  
     GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment()
120.  
     .getDefaultScreenDevice();
121.  
     gd.setFullScreenWindow(rd);
122.  
     }
123.  
     }

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4.方法三：

 

1.  
   package com.credream.ocr;
2.  
   import java.awt.AWTException;
3.  
   import java.awt.Rectangle;
4.  
   import java.awt.Robot;
5.  
   import java.awt.image.BufferedImage;
6.  
   import java.io.File;
7.  
   import java.io.IOException;
8.  
   import javax.imageio.ImageIO;
9.  
    
10.  
    public class RobotExp {
11.  
    public static void main(String[] args) {
12.  
    try {
13.  
    Robot robot=new Robot();
14.  
    //根据指定的区域抓取屏幕的指定区域，1300是长度，800是宽度。
15.  
    BufferedImage bi=robot.createScreenCapture(new Rectangle(1300,800));
16.  
    //把抓取到的内容写到一个jpg文件中
17.  
    ImageIO.write(bi, "jpg", new File("C:\\sally\\bootstrap栅格1.png"));
18.  
     
19.  
    } catch (AWTException e) {
20.  
    e.printStackTrace();
21.  
    } catch (IOException e) {
22.  
    e.printStackTrace();
23.  
    }
24.  
    }
25.  
    }

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三种方法，大致相同，只不过有的加了一些额外的方法。

https://blog.csdn.net/sanluo11/article/details/61923549