截屏代码java 编程结果截屏

java 怎么实现网页截图

代码如下

[java]

span style="font-size:18px;"package com.util;

import java.awt.AWTException;

import java.awt.Desktop;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.event.KeyEvent;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.net.URISyntaxException;

import java.net.URL;

import javax.imageio.ImageIO;

public class CutPicture {

public static void main(String[] args) throws Exception,

IOException, URISyntaxException, AWTException {

// 此方法仅适用于JdK1.6及以上版本

Desktop.getDesktop().browse(new URL("").toURI());

Robot robot = new Robot();

robot.delay(10000);

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

int width = (int) d.getWidth();

int height = (int) d.getHeight();

// 最大化浏览器

robot.keyRelease(KeyEvent.VK_F11);

robot.delay(2000);

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

BufferedImage bi = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = bi.createGraphics();

g.drawImage(image, 0, 0, width, height, null);

// 保存图片

ImageIO.write(bi, "jpg", new File("c:/open.jpg"));

}

}/span

相关问答

Q1: JAVA 截屏函数

有啊 核心提示：函数需要 uses Direct3D9,D3DX9; 偶然发现一个函数可以直接保存表面到文件1！所以修改了一下，函数为：...

procedure CaptureScreen(Const FileName: string);

var

BitsPerPixel: Byte;

pD3D: IDirect3D9;

pSurface: IDirect3DSurface9;

g_pD3DDevice: IDirect3DDevice9;

D3DPP: TD3DPresentParameters;

ARect: TRect;

LockedRect: TD3DLockedRect;

BMP: TBitmap;

i, p: Integer;

begin

BitsPerPixel := GetDeviceCaps(Canvas.Handle, BITSPIXEL);

FillChar(d3dpp, SizeOf(d3dpp), 0);

D3DPP.Windowed := True;

D3DPP.Flags := D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;

D3DPP.SwapEffect := D3DSWAPEFFECT_DISCARD;

D3DPP.BackBufferWidth := Screen.Width;

D3DPP.BackBufferHeight := Screen.Height;

D3DPP.BackBufferFormat := D3DFMT_X8R8G8B8;

pD3D := Direct3DCreate9(D3D_SDK_VERSION);

pD3D.CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, GetDesktopWindow,

D3DCREATE_SOFTWARE_VERTEXPROCESSING, @D3DPP, g_pD3DDevice);

g_pD3DDevice.CreateOffscreenPlainSurface(Screen.Width, Screen.Height, D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, pSurface, nil);

g_pD3DDevice.GetFrontBufferData(0, pSurface);

// use D3D to save surface. Notes: D3DX%ab.dll is required!

// D3DXSaveSurfaceToFile('Desktop.bmp', D3DXIFF_BMP, pSurface, nil, nil);

// use Bitmap to save surface

ARect := Screen.DesktopRect;

pSurface.LockRect(LockedRect, @ARect, D3DLOCK_NO_DIRTY_UPDATE or D3DLOCK_NOSYSLOCK or D3DLOCK_READONLY);

BMP := TBitmap.Create;

BMP.Width := Screen.Width;

BMP.Height := Screen.Height;

case BitsPerPixel of

8: BMP.PixelFormat := pf8bit;

16: BMP.PixelFormat := pf16bit;

24: BMP.PixelFormat := pf24bit;

32: BMP.PixelFormat := pf32bit;

end;

p := Cardinal(LockedRect.pBits);

for i := 0 to Screen.Height - 1 do

begin

CopyMemory(BMP.ScanLine[i], Ptr(p), Screen.Width * BitsPerPixel div 8);

p := p + LockedRect.Pitch;

end;

BMP.SaveToFile(FileName);

BMP.Free;

pSurface.UnlockRect;

end;

procedure CaptureScreen(const FileName: string;Const FileType: TD3DXImageFileFormat);

var

pD3D: IDirect3D9;

pSurface: IDirect3DSurface9;

g_pD3DDevice: IDirect3DDevice9;

D3DPP: TD3DPresentParameters;

begin

FillChar(d3dpp, SizeOf(d3dpp), 0);

D3DPP.Windowed := True;

D3DPP.Flags := D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;

D3DPP.SwapEffect := D3DSWAPEFFECT_DISCARD;

D3DPP.BackBufferWidth := Screen.Width;

D3DPP.BackBufferHeight := Screen.Height;

D3DPP.BackBufferFormat := D3DFMT_X8R8G8B8;

pD3D := Direct3DCreate9(D3D_SDK_VERSION);

pD3D.CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, GetDesktopWindow,

D3DCREATE_SOFTWARE_VERTEXPROCESSING, @D3DPP, g_pD3DDevice);

g_pD3DDevice.CreateOffscreenPlainSurface(Screen.Width, Screen.Height, D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, pSurface, nil);

g_pD3DDevice.GetFrontBufferData(0, pSurface);

D3DX9.D3DXSaveSurfaceToFile(PChar(FileName),FileType,pSurface,nil,nil);

pSurface := nil;

g_pD3DDevice := nil;

pD3D := nil;

end;

传递两个参数，第一个参数指定为文件名，第二个参数指定为文件类型

支持7种类型

_D3DXIMAGE_FILEFORMAT = (

D3DXIFF_BMP {= 0},

D3DXIFF_JPG {= 1},

D3DXIFF_TGA {= 2},

D3DXIFF_PNG {= 3},

D3DXIFF_DDS {= 4},

D3DXIFF_PPM {= 5},

D3DXIFF_DIB {= 6}

);

再给一个使用dX8实现的，上面给的是用Dx9实现的函数

procedure CaptureScreen(const FileName: string;Const FileType: TD3DXImageFileFormat);

var

pD3D: IDirect3D8;

pSurface: IDirect3DSurface8;

g_pD3DDevice: IDirect3DDevice8;

D3DPP: TD3DPresentParameters;

begin

FillChar(d3dpp, SizeOf(d3dpp), 0);

D3DPP.Windowed := True;

D3DPP.Flags := D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;

D3DPP.SwapEffect := D3DSWAPEFFECT_DISCARD;

D3DPP.BackBufferWidth := Screen.Width;

D3DPP.BackBufferHeight := Screen.Height;

D3DPP.BackBufferFormat := D3DFMT_X8R8G8B8;

pD3D := Direct3DCreate8(D3D_SDK_VERSION);

pD3D.CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, GetDesktopWindow,

D3DCREATE_SOFTWARE_VERTEXPROCESSING, D3DPP, g_pD3DDevice);

g_pD3DDevice.CreateImageSurface(Screen.Width, Screen.Height, D3DFMT_A8R8G8B8, pSurface);

g_pD3DDevice.GetFrontBuffer(pSurface);

D3DX8.D3DXSaveSurfaceToFile(PChar(FileName),FileType,pSurface,nil,nil);

pSurface := nil;

g_pD3DDevice := nil;

pD3D := nil;

end;

再给一个直接使用系统GDI实现的抓屏

procedure CaptureScreen(const FileName: string);overload;

var

nScreenWidth,nScreenHeight: integer;

ScreenDc,hCaptureDC: HDC;

bmp: TBitmap;

begin

nScreenWidth := GetSystemMetrics(SM_CXSCREEN);

nScreenHeight := GetSystemMetrics(SM_CYSCREEN);

ScreenDc := GetDC(GetDesktopWindow);

hCaptureDC := CreateCompatibleDC(ScreenDc);

bmp := TBitmap.Create;

bmp.Handle :=CreateCompatibleBitmap(ScreenDc,nScreenWidth, nScreenHeight);

SelectObject(hCaptureDC,bmp.Handle);

BitBlt(hCaptureDC,0,0,nScreenWidth,nScreenHeight,ScreenDc,0,0,SRCCOPY);

bmp.SaveToFile(fileName);

ReleaseDC(GetDesktopWindow,ScreenDc);

DeleteDC(hCaptureDC);

bmp.Free;

end;

通过上面这一步，我们可以很容易联想到用来抓取任何一个控件的表面图象，函数如下：

procedure CaptureControl(Control: TWinControl;const FileName: string);overload;

var

ControlWidth,ControlHeight: integer;

ControlDc,hCaptureDC: HDC;

bmp: TBitmap;

begin

ControlWidth := Control.ClientWidth;

ControlHeight := Control.ClientHeight;

ControlDc := GetDC(Control.Handle);

hCaptureDC := CreateCompatibleDC(ControlDc);

bmp := TBitmap.Create;

bmp.Handle :=CreateCompatibleBitmap(ControlDc,ControlWidth,ControlHeight);

SelectObject(hCaptureDC,bmp.Handle);

BitBlt(hCaptureDC,0,0,ControlWidth,ControlHeight,ControlDc,0,0,SRCCOPY);

bmp.SaveToFile(fileName);

ReleaseDC(GetDesktopWindow,ControlDc);

DeleteDC(hCaptureDC);

bmp.Free;

end;

Q2: java 禁止截屏键

在安卓ANDROID开发中，有些内容或文档是为防止知识产权，防信息外泄，需要做一些保护措施，Android中如何禁止用户截屏,防止截图java代码

在需要设置禁止截屏的Activity的onCreate()方法中调用setContentView()方法前添加一行代码即可：

getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);

或：

getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);

将以上代码，加入需要保护的ACTIVE中，以上 JAVA代码可以有效防止截图，截屏操作行为，这是一种很好的保护策略。

Q3: 如何以Java实现网页截图技术

事实上，如果您想以Java实现网页截图，也就是“输入一段网址，几秒钟过后就能截取一张网页缩略图”的效果。那么，您至少有3种方式可以选择。

1、最直接的方式——使用Robot

方法详解：该方法利用Robat提供的强大桌面操作能力，硬性调用浏览器打开指定网页，并将网页信息保存到本地。

优势：简单易用，不需要任何第三方插件。

缺点：不能同时处理大量数据，技术含量过低，属于应急型技巧。

实现方法：使用如下代码即可。

[java] view plaincopy

public static void main(String[] args) throws MalformedURLException,

IOException, URISyntaxException, AWTException {

//此方法仅适用于JdK1.6及以上版本

Desktop.getDesktop().browse(

new URL("").toURI());

Robot robot = new Robot();

robot.delay(10000);

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

int width = (int) d.getWidth();

int height = (int) d.getHeight();

//最大化浏览器

robot.keyRelease(KeyEvent.VK_F11);

robot.delay(2000);

Image image = robot.createScreenCapture(new Rectangle(0, 0, width,

height));

BufferedImage bi = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = bi.createGraphics();

g.drawImage(image, 0, 0, width, height, null);

//保存图片

ImageIO.write(bi, "jpg", new File("google.jpg"));

}

2、最常规的方式——利用JNI，调用第三方C/C++组件

方法详解：目前来讲，Java领域对于网页截图组件的开发明显不足（商机？），当您需要完成此种操作时，算得上碰到了Java的软肋。但是，众所周知Java也拥有强大的JNI能力，可以轻易将C/C++开发的同类组件引为己用。不懂可以扣五七八零二四一四四

优势：实现简单，只需要封装对应的DLL文件，就可以让Java实现同类功能。

劣势：同其他JNI实现一样，在跨平台时存在隐患，而且您的程序将不再属于纯Java应用。

Q4: java 实现截屏！

主要是利用java的几个先有的函数，如Robot这个类的一个方法createScreenCapture一个获得一个任意大小的屏幕图像（在这里是全屏图像），而所谓的截图就是在这个图像上画出一个矩形，再利用上面的方法获得这部分的图像，程序中的cf.setAlwaysOnTop(true)是必需的;看起来是在屏幕上截图，其实只是在一个在一个内镶有桌面背景的JFrame中截图。不知道还有没有其他的好方法~

附上代码：

import java.awt.*;

import java.awt.image.*;

import java.awt.event.*;

import java.io.File;

import javax.imageio.ImageIO;

import javax.swing.*;

public class Camera {

/**

* @param args

*/

public static void main(String[] args) {

CameraJFrame cf=new CameraJFrame();

cf.setAlwaysOnTop(true);

cf.setUndecorated(true);

cf.setVisible(true);

}

}

class CameraJFrame extends JFrame

{

/**

*

*/

private static final long serialVersionUID = 1L;

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

public CameraJFrame()

{

setSize(di);

getContentPane().add(new CameraJPanel());

}

class CameraJPanel extends JPanel implements MouseListener,MouseMotionListener

{

/**

* flag主要是用来判别状态。

* 文件的格式名是unname+数字编号，格式是png

*/

private static final long serialVersionUID = 1L;

BufferedImage bi,get;

int startx,starty,endx,endy;

int flag=1;

String filename="unname";

String fileformat="png";

int count=1;

public CameraJPanel()

{

try

{

Robot ro=new Robot();

bi=ro.createScreenCapture(new Rectangle(0,0,di.width,di.height));

}

catch(Exception e)

{

e.printStackTrace();

}

addMouseListener(this);

addMouseMotionListener(this);

}

public void paintComponent(Graphics g)

{

g.drawImage(bi,0,0,di.width,di.height,this);

g.setColor(Color.red);

g.drawRect(startx, starty, endx-startx, endy-starty);

}

public void mouseClicked(MouseEvent e) {

// TODO Auto-generated method stub

if(e.getButton()==MouseEvent.BUTTON3)

{

System.exit(0);

}

else if(e.getClickCount()==2)

{

try

{

Robot ro=new Robot();

get=ro.createScreenCapture(new Rectangle(startx,starty,endx-startx,endy-starty));

String name=filename+String.valueOf(count++)+"."+fileformat;

File f=new File(name);

ImageIO.write(get, fileformat, f);

}

catch(Exception ex)

{

ex.printStackTrace();

}

flag=1; //置flag为1，以便重新开始截图。

startx=starty=endx=endy=0;

repaint();

}

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {

if(flag==1)

{

startx=e.getX();

starty=e.getY();

}

}

public void mouseReleased(MouseEvent e) {

flag=0;

}

public void mouseDragged(MouseEvent e) {

flag=1;

endx=e.getX();

endy=e.getY();

repaint();

}

public void mouseMoved(MouseEvent e) {}

}

}