Java實(shí)現(xiàn)屏幕截圖工具的代碼分享

第Java實(shí)現(xiàn)屏幕截圖工具的代碼分享目錄效果展示程序結(jié)構(gòu)核心代碼

效果展示

程序運(yùn)行后的截圖：

先測(cè)試一下功能：

截圖過(guò)程對(duì)界面的捕捉：

雙擊保存后的顯示界面：

后續(xù)的步驟就自己去嘗試吧，這里給出了簡(jiǎn)單的測(cè)試過(guò)程。

程序結(jié)構(gòu)

核心代碼

CaptureScreen.java類

/**

*CaptureScreen.java

importjava.awt.*;

importjava.awt.datatransfer.DataFlavor;

importjava.awt.datatransfer.Transferable;

importjava.awt.datatransfer.UnsupportedFlavorException;

importjava.awt.event.*;

importjavax.swing.*;

importjava.io.*;

importjavax.imageio.*;

importjava.awt.image.*;

publicclassCaptureScreenextendsJFrameimplementsActionListener{

privateJButtonstart,cancel;

privateJPanelc;

privateBufferedImageget;

privateJTabbedPanejtp;//一個(gè)放置很多份圖片

privateintindex;//一個(gè)一直會(huì)遞增的索引,用于標(biāo)認(rèn)圖片

privateJRadioButtonjava,system;//JAVA界面,系統(tǒng)界面

/**CreatesanewinstanceofCaptureScreen*/

publicCaptureScreen(){

super("屏幕截取");

try{

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

}catch(Exceptionexe){

exe.printStackTrace();

initWindow();

initOther();

privatevoidinitOther(){

jtp=newJTabbedPane(JTabbedPane.TOP,JTabbedPane.SCROLL_TAB_LAYOUT);

privatevoidinitWindow(){

start=newJButton("開(kāi)始截取");

cancel=newJButton("退出");

start.addActionListener(this);

cancel.addActionListener(this);

JPanelbuttonJP=newJPanel();

c=newJPanel(newBorderLayout());

JLabeljl=newJLabel("屏幕截取",JLabel.CENTER);

jl.setFont(newFont("黑體",Font.BOLD,40));

jl.setForeground(Color.RED);

c.add(jl,BorderLayout.CENTER);

buttonJP.add(start);

buttonJP.add(cancel);

buttonJP.setBorder(BorderFactory.createTitledBorder("公共操作區(qū)"));

JPaneljp=newJPanel();//放置兩個(gè)單選按鈕的面板

jp.add(java=newJRadioButton("java界面"));

jp.add(system=newJRadioButton("系統(tǒng)界面",true));

java.addActionListener(this);

system.addActionListener(this);

jp.setBorder(BorderFactory.createTitledBorder("界面風(fēng)格"));

ButtonGroupbg=newButtonGroup();

bg.add(java);

bg.add(system);

JPanelall=newJPanel();

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);

privatevoidupdates(){

this.setVisible(true);

if(get!=null){

//如果索引是0,則表示一張圖片都沒(méi)有被加入過(guò),

//則要清除當(dāng)前的東西,重新把tabpane放進(jìn)來(lái)

if(index==0){

c.removeAll();

c.add(jtp,BorderLayout.CENTER);

}else{//否則的話,直接對(duì)tabpane添加面板就可以了

//就什么都不用做了

PicPanelpic=newPicPanel(get);

jtp.addTab("圖片"+(++index),pic);

jtp.setSelectedComponent(pic);

SwingUtilities.updateComponentTreeUI(c);//調(diào)整LookAndFeel（javax.swing）

privatevoiddoStart(){

try{

this.setVisible(false);

Thread.sleep(500);//睡500毫秒是為了讓主窗完全不見(jiàn)

Robotro=newRobot();//（通過(guò)本地操作）控制鼠標(biāo)、鍵盤(pán)等實(shí)際輸入源（java.awt）

Toolkittk=Toolkit.getDefaultToolkit();//AWT組件的抽象父類（java.awt）

Dimensiondi=tk.getScreenSize();

Rectanglerec=newRectangle(0,0,di.width,di.height);

BufferedImagebi=ro.createScreenCapture(rec);

JFramejf=newJFrame();

Temptemp=newTemp(jf,bi,di.width,di.height);//自定義的Temp類的對(duì)象

jf.getContentPane().add(temp,BorderLayout.CENTER);

jf.setUndecorated(true);

jf.setSize(di);

jf.setVisible(true);

jf.setAlwaysOnTop(true);

}catch(Exceptionexe){

exe.printStackTrace();

*公用的處理保存圖片的方法

publicvoiddoSave(BufferedImageget){

try{

if(get==null){

JOptionPane.showMessageDialog(this

,"圖片不能為空!!","錯(cuò)誤",JOptionPane.ERROR_MESSAGE);

return;

JFileChooserjfc=newJFileChooser(".");

jfc.addChoosableFileFilter(newGIFfilter());

jfc.addChoosableFileFilter(newBMPfilter());

jfc.addChoosableFileFilter(newJPGfilter());

jfc.addChoosableFileFilter(newPNGfilter());

inti=jfc.showSaveDialog(this);

if(i==JFileChooser.APPROVE_OPTION){

Filefile=jfc.getSelectedFile();

Stringabout="PNG";

Stringext=file.toString().toLowerCase();

javax.swing.filechooser.FileFilterff=jfc.getFileFilter();

if(ffinstanceofJPGfilter){

if(!ext.endsWith(".jpg")){

Stringns=ext+".jpg";

file=newFile(ns);

about="JPG";

}elseif(ffinstanceofPNGfilter){

if(!ext.endsWith(".png")){

Stringns=ext+".png";

file=newFile(ns);

about="PNG";

}elseif(ffinstanceofBMPfilter){

if(!ext.endsWith(".bmp")){

Stringns=ext+".bmp";

file=newFile(ns);

about="BMP";

}elseif(ffinstanceofGIFfilter){

if(!ext.endsWith(".gif")){

Stringns=ext+".gif";

file=newFile(ns);

about="GIF";

if(ImageIO.write(get,about,file)){

JOptionPane.showMessageDialog(this,"保存成功！");

}else

JOptionPane.showMessageDialog(this,"保存失?。?);

}catch(Exceptionexe){

exe.printStackTrace();

/**

*公共的處理把當(dāng)前的圖片加入剪帖板的方法

publicvoiddoCopy(finalBufferedImageimage){

try{

if(get==null){

JOptionPane.showMessageDialog(this

,"圖片不能為空!!","錯(cuò)誤",JOptionPane.ERROR_MESSAGE);

return;

}//java.awt.datatransfer（接口）

Transferabletrans=newTransferable(){//內(nèi)部類

publicDataFlavor[]getTransferDataFlavors(){

returnnewDataFlavor[]{DataFlavor.imageFlavor};

publicbooleanisDataFlavorSupported(DataFlavorflavor){

returnDataFlavor.imageFlavor.equals(flavor);

publicObjectgetTransferData(DataFlavorflavor)

throwsUnsupportedFlavorException,IOException{

if(isDataFlavorSupported(flavor))

returnimage;

thrownewUnsupportedFlavorException(flavor);

Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans,null);

JOptionPane.showMessageDialog(this,"已復(fù)制到系統(tǒng)粘帖板!!");

}catch(Exceptionexe){

exe.printStackTrace();

JOptionPane.showMessageDialog(this

,"復(fù)制到系統(tǒng)粘帖板出錯(cuò)!!","錯(cuò)誤",JOptionPane.ERROR_MESSAGE);

//處理關(guān)閉事件

privatevoiddoClose(Componentc){

jtp.remove(c);

c=null;

System.gc();

publicvoidactionPerformed(ActionEventae){

Objectsource=ae.getSource();

if(source==start){

doStart();

}elseif(source==cancel){

System.exit(0);

}elseif(source==java){//金屬外觀

try{

UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());

SwingUtilities.updateComponentTreeUI(this);

}catch(Exceptionexe){

exe.printStackTrace();

}elseif(source==system){//本地外觀

try{

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

SwingUtilities.updateComponentTreeUI(this);

}catch(Exceptionexe){

exe.printStackTrace();

//一個(gè)內(nèi)部類,它表示一個(gè)面板,一個(gè)可以被放進(jìn)tabpane的面板

//也有自己的一套處理保存和復(fù)制的方法

privateclassPicPanelextendsJPanelimplementsActionListener{

JButtonsave,copy,close;//表示保存,復(fù)制,關(guān)閉的按鈕

BufferedImageget;//得到的圖片

publicPicPanel(BufferedImageget){

super(newBorderLayout());

this.get=get;

initPanel();

privatevoidinitPanel(){

save=newJButton("保存(S)");

copy=newJButton("復(fù)制到剪帖板(C)");

close=newJButton("關(guān)閉(X)");

save.setMnemonic('S');

copy.setMnemonic('C');

close.setMnemonic('X');

JPanelbuttonPanel=newJPanel();

buttonPanel.add(copy);

buttonPanel.add(save);

buttonPanel.add(close);

JLabelicon=newJLabel(newImageIcon(get));

this.add(newJScrollPane(icon),BorderLayout.CENTER);

this.add(buttonPanel,BorderLayout.SOUTH);

save.addActionListener(this);

copy.addActionListener(this);

close.addActionListener(this);

publicvoidactionPerformed(ActionEvente){

Objectsource=e.getSource();

if(source==save){

doSave(get);

}elseif(source==copy){

doCopy(get);

}elseif(source==close){

get=null;

doClose(this);

//保存BMP格式的過(guò)濾器

privateclassBMPfilterextendsjavax.swing.filechooser.FileFilter{

publicBMPfilter(){

publicbooleanaccept(Filefile){

if(file.toString().toLowerCase().endsWith(".bmp")||

file.isDirectory()){

returntrue;

}else

returnfalse;

publicStringgetDescription(){

return"*.BMP(BMP圖像)";

//保存JPG格式的過(guò)濾器

privateclassJPGfilterextendsjavax.swing.filechooser.FileFilter{

publicJPGfilter(){

publicbooleanaccept(Filefile){

if(file.toString().toLowerCase().endsWith(".jpg")||

file.isDirectory()){

returntrue;

}else

returnfalse;

publicStringgetDescription(){

return"*.JPG(JPG圖像)";

//保存GIF格式的過(guò)濾器

privateclassGIFfilterextendsjavax.swing.filechooser.FileFilter{

publicGIFfilter(){

publicbooleanaccept(Filefile){

if(file.toString().toLowerCase().endsWith(".gif")||

file.isDirectory()){

returntrue;

}else

returnfalse;

publicStringgetDescription(){

return"*.GIF(GIF圖像)";

//保存PNG格式的過(guò)濾器

privateclassPNGfilterextendsjavax.swing.filechooser.FileFilter{

publicbooleanaccept(Filefile){

if(file.toString().toLowerCase().endsWith(".png")||

file.isDirectory()){

returntrue;

}else

returnfalse;

publicStringgetDescription(){

return"*.PNG(PNG圖像)";

//一個(gè)臨時(shí)類，用于顯示當(dāng)前的屏幕圖像

privateclassTempextendsJPanelimplementsMouseListener,MouseMotionListener{

privateBufferedImagebi;

privateintwidth,height;

privateintstartX,startY,endX,endY,tempX,tempY;

privateJFramejf;

privateRectangleselect=newRectangle(0,0,0,0);//表示選中的區(qū)域

privateCursorcs=newCursor(Cursor.CROSSHAIR_CURSOR);//表示一般情況下的鼠標(biāo)狀態(tài)（十字線）

privateStatescurrent=States.DEFAULT;//表示當(dāng)前的編輯狀態(tài)

privateRectangle[]rec;//表示八個(gè)編輯點(diǎn)的區(qū)域

//下面四個(gè)常量,分別表示誰(shuí)是被選中的那條線上的端點(diǎn)

publicstaticfinalintSTART_X=1;

publicstaticfinalintSTART_Y=2;

publicstaticfinalintEND_X=3;

publicstaticfinalintEND_Y=4;

privateintcurrentX,currentY;//當(dāng)前被選中的X和Y,只有這兩個(gè)需要改變

privatePointp=newPoint();//當(dāng)前鼠標(biāo)移的地點(diǎn)

privatebooleanshowTip=true;//是否顯示提示.如果鼠標(biāo)左鍵一按,則提示就不再顯示了

publicTemp(JFramejf,BufferedImagebi,intwidth,intheight){

this.jf=jf;

this.bi=bi;

this.width=width;

this.height=height;

this.addMouseListener(this);

this.addMouseMotionListener(this);

initRecs();

privatevoidinitRecs(){

rec=newRectangle[8];

for(inti=0;irec.length;i++){

rec[i]=newRectangle();

publicvoidpaintComponent(Graphicsg){

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);

intx=startXendXstartX:endX;

inty=startYendYstartY:endY;

select=newRectangle(x,y,Math.abs(endX-startX),Math.abs(endY-startY));

intx1=(startX+endX)/2;

inty1=(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]=newRectangle(x-5,y-5,10,10);

rec[1]=newRectangle(x1-5,y-5,10,10);

rec[2]=newRectangle((startXendXstartX:endX)-5,y-5,10,10);

rec[3]=newRectangle((startXendXstartX:endX)-5,y1-5,10,10);

rec[4]=newRectangle((startXendXstartX:endX)-5,(startYendYstartY:endY)-5,10,10);

rec[5]=newRectangle(x1-5,(startYendYstartY:endY)-5,10,10);

rec[6]=newRectangle(x-5,(startYendYstartY:endY)-5,10,10);

rec[7]=newRectangle(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("請(qǐng)按住鼠標(biāo)左鍵不放選擇截圖區(qū)",p.x,p.y+15);

//根據(jù)東南西北等八個(gè)方向決定選中的要修改的X和Y的座標(biāo)

privatevoidinitSelect(Statesstate){

switch(state){

caseDEFAULT:

currentX=0;

currentY=0;

break;

caseEAST:

currentX=(endXstartXEND_X:START_X);

currentY=0;

break;

caseWEST:

currentX=(endXstartXSTART_X:END_X);

currentY=0;

break;

caseNORTH:

currentX=0;

currentY=(startYendYEND_Y:START_Y);

break;

caseSOUTH:

currentX=0;

currentY=(startYendYSTART_Y:END_Y);

break;

caseNORTH_EAST:

currentY=(startYendYEND_Y:START_Y);

currentX=(endXstartXEND_X:START_X);

break;

caseNORTH_WEST:

currentY=(startYendYEND_Y:START_Y);

currentX=(endXstartXSTART_X:END_X);

break;

caseSOUTH_EAST:

currentY=(startYendYSTART_Y:END_Y);

currentX=(endXstartXEND_X:START_X);

break;

caseSOUTH_WEST:

currentY=(startYendYSTART_Y:END_Y);

currentX=(endXstartXSTART_X:END_X);

break;

default:

currentX=0;

currentY=0;

break;

publicvoidmouseMoved(MouseEventme){

doMouseMoved(me);

initSelect(current);//current：當(dāng)前狀態(tài)（state）

if(showTip){

p=me.getPoint();

repaint();

//特意定義一個(gè)方法處理鼠標(biāo)移動(dòng),是為了每次都能初始化一下所要選擇的區(qū)域

privatevoiddoMouseMoved(MouseEventme){

if(select.contains(me.getPoint())){

this.setCursor(newCursor(Cursor.MOVE_CURSOR));

current=States.MOVE;

}else{

States[]st=States.values();

for(inti=0;irec.length;i++){

if(rec[i].contains(me.getPoint())){

current=st[i];

this.setCursor(st[i].getCursor());

return;

this.setCursor(cs);

current=States.DEFAULT;

publicvoidmouseExited(MouseEventme){

publicvoidmouseEntered(MouseEventme){

publicvoidmouseDragged(MouseEventme){

intx=me.getX();

inty=me.getY();

//分別處理一系列的（光標(biāo)）狀態(tài)（枚舉值）

if(current==States.MOVE){

startX+=(x-tempX);

startY+=(y-tempY);

endX+=(x-tempX);

endY+=(y-tempY);

tempX=x;

tempY=y;

}elseif(current==States.EAST||current==States.WEST){

if(currentX==START_X){

startX+=(x-tempX);

tempX=x;

}else{

endX+=(x-tempX);

tempX=x;

}elseif(current==States.NORTH||current==States.SOUTH){

if(currentY==START_Y){

startY+=(y-tempY);

tempY=y;

}else{

endY+=(y-tempY);

tempY=y;

}elseif(current==States.NORTH_EAST||current==States.NORTH_EAST||

current==States.SOUTH_EAST||current==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();

publicvoidmousePressed(MouseEventme){

showTip=false;

tempX=me.getX();

tempY=me.getY();

publicvoidmouseReleased(MouseEventme){

if(me.isPopupTrigger()){//右鍵

if(current==States.MOVE){

showTip=true;

p=me.getPoint();

sta