java生成网页截图,java编程时的截图

目录

效果展示程序结构核心代码

效果展示

程序运行后的截图：

　　先测试一下功能：

　　截图过程对界面的捕捉：

　　双击保存后的显示界面：

　　后续的步骤就自己去尝试吧，这里给出了简单的测试过程。

程序结构

核心代码

CaptureScreen.java类

　　/* * * CaptureScreen.java */导入Java。awt。*;导入Java。awt。数据传输。数据味；导入Java。awt。数据传输。可转让；导入Java。awt。数据传输。unsupportedflavorexception导入Java。awt。事件。*;导入javax。挥棒。*;导入Java。io。*;导入javax。imageio。*;导入Java。awt。形象。*;公共类捕获屏幕扩展窗口实现动作监听器{ private j按钮开始，取消私人JPanel c；私有BufferedImage获取私人JTabbedPane jtp//一个放置很多份图片私有int索引；//一个一直会递增的索引，用于标认图片私有JRadioButton java，system//JAVA界面，系统界面/**创建capture screen */public capture screen(){ super(的新实例屏幕截取);请尝试{用户界面管理器。setlookandfeel(ui管理器。getsystemlookandfeelclassname())；} catch(异常exe){ exe。printstacktrace()；} initWindow()；init other()；} private void init other(){ jtp=new JTabbedPane(JTabbedPane .托普，JTabbedPane .SCROLL _ TAB _ LAYOUT)；} private void init window(){ start=new JButton(开始截取);取消=新建JButton(退出);开始吧。addactionlistener(this)；取消。addactionlistener(this)；JPanel button jp=new JPanel()；c=new JPanel(new BorderLayout())；JLabel jl=new JLabel(屏幕截取，JLabel .中心);jl.setFont(新字体(黑体，字体。粗体，40));jl.setForeground(颜色.红色);c.add(jl，BorderLayout .中心);buttonJP.add(开始);buttonJP.add(取消);巴顿jp。设置边框(边框工厂。createtitledborder(公共操作区));JPanel jp=new JPanel()；//放置两个单选按钮的面板jp。add(Java=new JRadioButton( Java界面));jp.add(system=new JRadioButton(系统界面，真));Java。addactionlistener(this)；系统。addactionlistener(this)；jp.setBorder(BorderFa

　　ctory.createTitledBorder("界面风格")); ButtonGroup bg=new ButtonGroup(); bg.add(java); bg.add(system); JPanel all=new JPanel(); all.add(jp); all.add(buttonJP); this.getContentPane().add(c,BorderLayout.CENTER); this.getContentPane().add(all,BorderLayout.SOUTH); this.setSize(500,400); this.setLocationRelativeTo(null); this.setVisible(true); this.setAlwaysOnTop(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } private void updates(){ this.setVisible(true); if(get!=null){ //如果索引是0,则表示一张图片都没有被加入过, //则要清除当前的东西,重新把tabpane放进来 if(index==0){ c.removeAll(); c.add(jtp,BorderLayout.CENTER); }else{//否则的话,直接对tabpane添加面板就可以了 //就什么都不用做了 } PicPanel pic=new PicPanel(get); jtp.addTab("图片"+(++index),pic); jtp.setSelectedComponent(pic); SwingUtilities.updateComponentTreeUI(c); // 调整LookAndFeel（javax.swing） } } private void doStart(){ try{ this.setVisible(false); Thread.sleep(500);//睡500毫秒是为了让主窗完全不见 Robot ro=new Robot(); // （通过本地操作）控制鼠标、键盘等实际输入源（java.awt） Toolkit tk=Toolkit.getDefaultToolkit(); // AWT组件的抽象父类（java.awt） Dimension di=tk.getScreenSize(); Rectangle rec=new Rectangle(0,0,di.width,di.height); BufferedImage bi=ro.createScreenCapture(rec); JFrame jf=new JFrame(); Temp temp=new Temp(jf,bi,di.width,di.height); // 自定义的Temp类的对象 jf.getContentPane().add(temp,BorderLayout.CENTER); jf.setUndecorated(true); jf.setSize(di); jf.setVisible(true); jf.setAlwaysOnTop(true); } catch(Exception exe){ exe.printStackTrace(); } } /** *公用的处理保存图片的方法 */ public void doSave(BufferedImage get){ try{ if(get==null){ JOptionPane.showMessageDialog(this , "图片不能为空!!", "错误", JOptionPane.ERROR_MESSAGE); return; } JFileChooser jfc=new JFileChooser("."); jfc.addChoosableFileFilter(new GIFfilter()); jfc.addChoosableFileFilter(new BMPfilter()); jfc.addChoosableFileFilter(new JPGfilter()); jfc.addChoosableFileFilter(new PNGfilter()); int i=jfc.showSaveDialog(this); if(i==JFileChooser.APPROVE_OPTION){ File file=jfc.getSelectedFile(); String about="PNG"; String ext=file.toString().toLowerCase(); javax.swing.filechooser.FileFilter ff=jfc.getFileFilter(); if(ff instanceof JPGfilter){ if(!ext.endsWith(".jpg")){ String ns=ext+".jpg"; file=new File(ns); about="JPG"; } } else if(ff instanceof PNGfilter){ if(!ext.endsWith(".png")){ String ns=ext+".png"; file=new File(ns); about="PNG"; } }else if(ff instanceof BMPfilter){ if(!ext.endsWith(".bmp")){ String ns=ext+".bmp"; file=new File(ns); about="BMP"; } }else if(ff instanceof GIFfilter){ if(!ext.endsWith(".gif")){ String ns=ext+".gif"; file=new File(ns); about="GIF"; } } if(ImageIO.write(get,about,file)){ JOptionPane.showMessageDialog(this,"保存成功！"); } else JOptionPane.showMessageDialog(this,"保存失败！"); } } catch(Exception exe){ exe.printStackTrace(); } } /** *公共的处理把当前的图片加入剪帖板的方法 */ public void doCopy(final BufferedImage image){ try{ if(get==null){ JOptionPane.showMessageDialog(this ,"图片不能为空!!","错误",JOptionPane.ERROR_MESSAGE); return; } // java.awt.datatransfer（接口） Transferable trans = new Transferable(){ // 内部类 public DataFlavor[] getTransferDataFlavors() { return new DataFlavor[] { DataFlavor.imageFlavor }; } public boolean isDataFlavorSupported(DataFlavor flavor) { return DataFlavor.imageFlavor.equals(flavor); } public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException { if(isDataFlavorSupported(flavor)) return image; throw new UnsupportedFlavorException(flavor); } }; Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans, null); JOptionPane.showMessageDialog(this,"已复制到系统粘帖板!!"); }catch(Exception exe){ exe.printStackTrace(); JOptionPane.showMessageDialog(this ,"复制到系统粘帖板出错!!","错误",JOptionPane.ERROR_MESSAGE); } } //处理关闭事件 private void doClose(Component c){ jtp.remove(c); c=null; System.gc(); } public void actionPerformed(ActionEvent ae){ Object source=ae.getSource(); if(source==start){ doStart(); } else if(source==cancel){ System.exit(0); }else if(source==java){ // 金属外观 try{ UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(this); }catch(Exception exe){ exe.printStackTrace(); } }else if(source==system){ // 本地外观 try{ UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(this); }catch(Exception exe){ exe.printStackTrace(); } } } //一个内部类,它表示一个面板,一个可以被放进tabpane的面板 //也有自己的一套处理保存和复制的方法 private class PicPanel extends JPanel implements ActionListener{ JButton save,copy,close;//表示保存,复制,关闭的按钮 BufferedImage get;//得到的图片 public PicPanel(BufferedImage get){ super(new BorderLayout()); this.get=get; initPanel(); } private void initPanel(){ save=new JButton("保存(S)"); copy=new JButton("复制到剪帖板(C)"); close=new JButton("关闭(X)"); save.setMnemonic(S); copy.setMnemonic(C); close.setMnemonic(X); JPanel buttonPanel=new JPanel(); buttonPanel.add(copy); buttonPanel.add(save); buttonPanel.add(close); JLabel icon=new JLabel(new ImageIcon(get)); this.add(new JScrollPane(icon),BorderLayout.CENTER); this.add(buttonPanel,BorderLayout.SOUTH); save.addActionListener(this); copy.addActionListener(this); close.addActionListener(this); } public void actionPerformed(ActionEvent e) { Object source=e.getSource(); if(source==save){ doSave(get); }else if(source==copy){ doCopy(get); }else if(source==close){ get=null; doClose(this); } } } //保存BMP格式的过滤器 private class BMPfilter extends javax.swing.filechooser.FileFilter{ public BMPfilter(){ } public boolean accept(File file){ if(file.toString().toLowerCase().endsWith(".bmp") file.isDirectory()){ return true; } else return false; } public String getDescription(){ return "*.BMP(BMP图像)"; } } //保存JPG格式的过滤器 private class JPGfilter extends javax.swing.filechooser.FileFilter{ public JPGfilter(){ } public boolean accept(File file){ if(file.toString().toLowerCase().endsWith(".jpg") file.isDirectory()){ return true; } else return false; } public String getDescription(){ return "*.JPG(JPG图像)"; } } //保存GIF格式的过滤器 private class GIFfilter extends javax.swing.filechooser.FileFilter{ public GIFfilter(){ } public boolean accept(File file){ if(file.toString().toLowerCase().endsWith(".gif") file.isDirectory()){ return true; } else return false; } public String getDescription(){ return "*.GIF(GIF图像)"; } } //保存PNG格式的过滤器 private class PNGfilter extends javax.swing.filechooser.FileFilter{ public boolean accept(File file){ if(file.toString().toLowerCase().endsWith(".png") file.isDirectory()){ return true; } else return false; } public String getDescription(){ return "*.PNG(PNG图像)"; } } //一个临时类，用于显示当前的屏幕图像 private class Temp extends JPanel implements MouseListener,MouseMotionListener{ private BufferedImage bi; private int width,height; private int startX,startY,endX,endY,tempX,tempY; private JFrame jf; private Rectangle select=new Rectangle(0,0,0,0);//表示选中的区域 private Cursor cs=new Cursor(Cursor.CROSSHAIR_CURSOR);//表示一般情况下的鼠标状态（十字线） private States current=States.DEFAULT;// 表示当前的编辑状态 private Rectangle[] rec;//表示八个编辑点的区域 //下面四个常量,分别表示谁是被选中的那条线上的端点 public static final int START_X=1; public static final int START_Y=2; public static final int END_X=3; public static final int END_Y=4; private int currentX,currentY;//当前被选中的X和Y,只有这两个需要改变 private Point p=new Point();//当前鼠标移的地点 private boolean showTip=true;//是否显示提示.如果鼠标左键一按,则提示就不再显示了 public Temp(JFrame jf,BufferedImage bi,int width,int height){ this.jf=jf; this.bi=bi; this.width=width; this.height=height; this.addMouseListener(this); this.addMouseMotionListener(this); initRecs(); } private void initRecs(){ rec=new Rectangle[8]; for(int i=0;i<rec.length;i++){ rec[i]=new Rectangle(); } } public void paintComponent(Graphics g){ g.drawImage(bi,0,0,width,height,this); g.setColor(Color.RED); g.drawLine(startX,startY,endX,startY); g.drawLine(startX,endY,endX,endY); g.drawLine(startX,startY,startX,endY); g.drawLine(endX,startY,endX,endY); int x=startX<endX?startX:endX; int y=startY<endY?startY:endY; select=new Rectangle(x,y,Math.abs(endX-startX),Math.abs(endY-startY)); int x1=(startX+endX)/2; int y1=(startY+endY)/2; g.fillRect(x1-2,startY-2,5,5); g.fillRect(x1-2,endY-2,5,5); g.fillRect(startX-2,y1-2,5,5); g.fillRect(endX-2,y1-2,5,5); g.fillRect(startX-2,startY-2,5,5); g.fillRect(startX-2,endY-2,5,5); g.fillRect(endX-2,startY-2,5,5); g.fillRect(endX-2,endY-2,5,5); rec[0]=new Rectangle(x-5,y-5,10,10); rec[1]=new Rectangle(x1-5,y-5,10,10); rec[2]=new Rectangle((startX>endX?startX:endX)-5,y-5,10,10); rec[3]=new Rectangle((startX>endX?startX:endX)-5,y1-5,10,10); rec[4]=new Rectangle((startX>endX?startX:endX)-5,(startY>endY?startY:endY)-5,10,10); rec[5]=new Rectangle(x1-5,(startY>endY?startY:endY)-5,10,10); rec[6]=new Rectangle(x-5,(startY>endY?startY:endY)-5,10,10); rec[7]=new Rectangle(x-5,y1-5,10,10); if(showTip){ g.setColor(Color.CYAN); g.fillRect(p.x,p.y,170,20); g.setColor(Color.RED); g.drawRect(p.x,p.y,170,20); g.setColor(Color.BLACK); g.drawString("请按住鼠标左键不放选择截图区",p.x,p.y+15); } } //根据东南西北等八个方向决定选中的要修改的X和Y的座标 private void initSelect(States state){ switch(state){ case DEFAULT: currentX=0; currentY=0; break; case EAST: currentX=(endX>startX?END_X:START_X); currentY=0; break; case WEST: currentX=(endX>startX?START_X:END_X); currentY=0; break; case NORTH: currentX=0; currentY=(startY>endY?END_Y:START_Y); break; case SOUTH: currentX=0; currentY=(startY>endY?START_Y:END_Y); break; case NORTH_EAST: currentY=(startY>endY?END_Y:START_Y); currentX=(endX>startX?END_X:START_X); break; case NORTH_WEST: currentY=(startY>endY?END_Y:START_Y); currentX=(endX>startX?START_X:END_X); break; case SOUTH_EAST: currentY=(startY>endY?START_Y:END_Y); currentX=(endX>startX?END_X:START_X); break; case SOUTH_WEST: currentY=(startY>endY?START_Y:END_Y); currentX=(endX>startX?START_X:END_X); break; default: currentX=0; currentY=0; break; } } public void mouseMoved(MouseEvent me){ doMouseMoved(me); initSelect(current); // current：当前状态（state） if(showTip){ p=me.getPoint(); repaint(); } } //特意定义一个方法处理鼠标移动,是为了每次都能初始化一下所要选择的区域 private void doMouseMoved(MouseEvent me){ if(select.contains(me.getPoint())){ this.setCursor(new Cursor(Cursor.MOVE_CURSOR)); current=States.MOVE; } else{ States[] st=States.values(); for(int i=0;i<rec.length;i++){ if(rec[i].contains(me.getPoint())){ current=st[i]; this.setCursor(st[i].getCursor()); return; } } this.setCursor(cs); current=States.DEFAULT; } } public void mouseExited(MouseEvent me){ } public void mouseEntered(MouseEvent me){ } public void mouseDragged(MouseEvent me){ int x=me.getX(); int y=me.getY(); // 分别处理一系列的（光标）状态（枚举值） if(current==States.MOVE){ startX+=(x-tempX); startY+=(y-tempY); endX+=(x-tempX); endY+=(y-tempY); tempX=x; tempY=y; }else if(current==States.EASTcurrent==States.WEST){ if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } }else if(current==States.NORTHcurrent==States.SOUTH){ if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } }else if(current==States.NORTH_EASTcurrent==States.NORTH_EAST current==States.SOUTH_EASTcurrent==States.SOUTH_WEST){ if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } }else{ startX=tempX; startY=tempY; endX=me.getX(); endY=me.getY(); } this.repaint(); } public void mousePressed(MouseEvent me){ showTip=false; tempX=me.getX(); tempY=me.getY(); } public void mouseReleased(MouseEvent me){ if(me.isPopupTrigger()){ // 右键 if(current==States.MOVE){ showTip=true; p=me.getPoint(); startX=0; startY=0; endX=0; endY=0; repaint(); } else{ // 普通情况 jf.dispose(); updates(); } } } public void mouseClicked(MouseEvent me){ if(me.getClickCount()==2){ //Rectangle rec=new Rectangle(startX,startY,Math.abs(endX-startX),Math.abs(endY-startY)); Point p=me.getPoint(); if(select.contains(p)){ if(select.x+select.width<this.getWidth()&&select.y+select.height<this.getHeight()){ get=bi.getSubimage(select.x,select.y,select.width,select.height); jf.dispose(); updates(); }else{ int wid=select.width,het=select.height; if(select.x+select.width>=this.getWidth()){ wid=this.getWidth()-select.x; } if(select.y+select.height>=this.getHeight()){ het=this.getHeight()-select.y; } get=bi.getSubimage(select.x,select.y,wid,het); jf.dispose(); updates(); } } } } } public static void main(String args[]) { SwingUtilities.invokeLater(new Runnable(){ public void run(){ new CaptureScreen(); } }); }}//一些表示状态的枚举enum States{ NORTH_WEST(new Cursor(Cursor.NW_RESIZE_CURSOR)),//表示西北角 NORTH(new Cursor(Cursor.N_RESIZE_CURSOR)), NORTH_EAST(new Cursor(Cursor.NE_RESIZE_CURSOR)), EAST(new Cursor(Cursor.E_RESIZE_CURSOR)), SOUTH_EAST(new Cursor(Cursor.SE_RESIZE_CURSOR)), SOUTH(new Cursor(Cursor.S_RESIZE_CURSOR)), SOUTH_WEST(new Cursor(Cursor.SW_RESIZE_CURSOR)), WEST(new Cursor(Cursor.W_RESIZE_CURSOR)), MOVE(new Cursor(Cursor.MOVE_CURSOR)), DEFAULT(new Cursor(Cursor.DEFAULT_CURSOR)); private Cursor cs; States(Cursor cs){ this.cs=cs; } public Cursor getCursor(){ return cs; }}云链接：Java之屏幕截图

　　提取码：1234

　　到此这篇关于Java实现屏幕截图工具的代码分享的文章就介绍到这了,更多相关Java屏幕截图工具内容请搜索盛行IT以前的文章或继续浏览下面的相关文章希望大家以后多多支持盛行IT！

郑重声明：本文由网友发布，不代表盛行IT的观点，版权归原作者所有，仅为传播更多信息之目的，如有侵权请联系，我们将第一时间修改或删除，多谢。