java实现录屏功能

A. 利用java编写代码实现如下功能，需要全部代码

很简单的应用，为了节省字数，代码注释我就不加了

首先是显示层，LoinWindow：

importjava.awt.FlowLayout;
importjava.awt.GridBagConstraints;
importjava.awt.GridBagLayout;
importjava.awt.GridLayout;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.awt.event.FocusEvent;
importjava.awt.event.FocusListener;

importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JLabel;
importjavax.swing.JOptionPane;
importjavax.swing.JPanel;
importjavax.swing.JTextField;
importjavax.swing.border.EmptyBorder;

,FocusListener{
	privateJPanelmainPanel,namePanel,btnPanel;
	privateJTextFieldtfName,tfPsd;
	privateJButtonbtnLogin,btnCancel;
	
	privatestaticfinalintWIDTH=300;
	privatestaticfinalintHEIGHT=200;
	
	privateLoginServiceservice=newLoginService();
	
	publicLoinWindow(){
		super("登录窗体");
	}
	
	publicvoidlaunch(){
		setSize(WIDTH,HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		
		GridLayoutmainLayout=newGridLayout(2,1);
		mainLayout.setVgap(10);
		mainPanel=newJPanel(mainLayout);
		
		GridBagLayoutnameLayout=newGridBagLayout();
		namePanel=newJPanel(nameLayout);
		namePanel.setBorder(newEmptyBorder(10,10,10,10));
		JLabelnameLabel=newJLabel("姓名：");
		tfName=newJTextField();
		JLabelpsdLabel=newJLabel("密码：");
		tfPsd=newJTextField();
		JLabelblank=newJLabel("");
		namePanel.add(nameLabel);
		namePanel.add(tfName);
		namePanel.add(blank);
		namePanel.add(psdLabel);
		namePanel.add(tfPsd);

		GridBagConstraintss=newGridBagConstraints();
		s.fill=GridBagConstraints.BOTH;
		
		s.gridwidth=1;
		s.weightx=0;
		s.weighty=0;
		nameLayout.setConstraints(nameLabel,s);

		s.gridwidth=0;
		s.weightx=1;
		s.weighty=0;
		nameLayout.setConstraints(tfName,s);
		
		s.gridwidth=0;
		s.weightx=4;
		s.weighty=0;
		nameLayout.setConstraints(blank,s);

		s.gridwidth=1;
		s.weightx=0;
		s.weighty=0;
		nameLayout.setConstraints(psdLabel,s);

		s.gridwidth=3;
		s.weightx=1;
		s.weighty=0;
		nameLayout.setConstraints(tfPsd,s);
		
		FlowLayoutbtnLayout=newFlowLayout();
		btnLayout.setAlignment(FlowLayout.CENTER);
		btnPanel=newJPanel(btnLayout);
		btnLogin=newJButton("确定");
		btnCancel=newJButton("取消");
		btnPanel.add(btnLogin);
		btnPanel.add(btnCancel);
		
		btnCancel.addActionListener(this);
		btnLogin.addActionListener(this);
		
		mainPanel.add(namePanel);
		mainPanel.add(btnPanel);
		setContentPane(mainPanel);
		
		tfName.addFocusListener(this);
		tfPsd.addFocusListener(this);
		
		pack();
		setSize(WIDTH,HEIGHT);
		setLocationRelativeTo(null);
	}

	@Override
	publicvoidactionPerformed(ActionEvente){
		Objectsource=e.getSource();
		if(source==btnCancel){
			System.exit(0);
		}elseif(source==btnLogin){
			Stringusername=tfName.getText();
			Stringpassword=tfPsd.getText();
			booleansuccess=service.login(username,password);
			if(success){
				warn("成功","登录成功！");
			}else{
				warn("失败","您输入的用户名或密码错误！");
			}
		}
	}

	@Override
	publicvoidfocusGained(FocusEventarg0){
	}
	@Override
	publicvoidfocusLost(FocusEvente){
		Objectsource=e.getSource();
		if(source==tfName){
			Stringusername=tfName.getText();
			try{
				service.matchUsername(username);
			}catch(LoginExceptione1){
				warn("验证错误",e1.getMessage());
			}
		}elseif(source==tfPsd){
			Stringpassword=tfPsd.getText();
			try{
				service.matchPassword(password);
			}catch(LoginExceptione1){
				warn("验证错误",e1.getMessage());
			}
		}
	}
	
	privatevoidwarn(Stringtitle,Stringmsg){
		JOptionPane.showMessageDialog(null,msg,title,JOptionPane.INFORMATION_MESSAGE);
	}

	publicstaticvoidmain(String[]args){
		newLoinWindow().launch();
	}

}

然后是模型层：LoginDao

publicclassLoginDao{
	publicbooleanlogin(Stringusername,Stringpassword){
		if(username.equals("admin")&&password.equals("12345")){
			returntrue;
		}
		returnfalse;
	}
}

LoginService

importjava.util.regex.Pattern;
publicclassLoginService{
	_PATTERN=Pattern.compile("[a-zA-Z]+");
	_PATTERN=Pattern.compile("[1-9]+");
	
	privateLoginDao=newLoginDao();
	
	publicbooleanmatchUsername(Stringusername)throwsLoginException{
		if(null==username||username.isEmpty()){
			returnfalse;
		}
		if(!LOGIN_PATTERN.matcher(username).matches()){
			thrownewLoginException("您输入的用户名不合法，请输入英文！");
		}
		returntrue;
	}
	
	publicbooleanmatchPassword(Stringpassword)throwsLoginException{
		if(null==password||password.isEmpty()){
			returnfalse;
		}
		if(!PASSWORD_PATTERN.matcher(password).matches()){
			thrownewLoginException("您输入的密码不合法，请输入数字！");
		}
		returntrue;
	}

	publicbooleanlogin(Stringusername,Stringpassword){
		if(null==username||username.isEmpty()){
			returnfalse;
		}
		if(null==password||password.isEmpty()){
			returnfalse;
		}
		if(!.login(username,password)){
			returnfalse;
		}
		returntrue;
	}
}

LoginException

{

	publicLoginException(Stringarg0){
		super(arg0);
	}

}

不知道分层设计思想是不是我想的这样

B. java如何实现屏幕录制功能

这种功能一本不用JAVA写，因为他要和系统的本地资源打交道。
你可以使用VC、VB、delphi这类原生开发工具做。
也可以使用C#来写。

C. 用java编写一个控制台应用程序，实现如下功能：

importjava.util.Scanner;
publicclassAA{

	publicstaticvoidmain(String[]args){
		=newScanner(System.in);
		System.out.println("请输入：");
		Stringstr=sc.nextLine();
		System.out.println(str);
		Strings1=str.substring(0,str.indexOf(""));
		Strings2=str.substring(str.indexOf("")+1,str.length());
		intc=Integer.parseInt(s2);
		if(c<60){
			if("-a".equals(s1)){
				System.out.println("E");
			}else{
				System.out.println("不及格");
			}
		}elseif(c<70){
			if("-a".equals(s1)){
				System.out.println("D");
			}else{
				System.out.println("及格");
			}
		}elseif(c<80){
			if("-a".equals(s1)){
				System.out.println("C");
			}else{
				System.out.println("中等");
			}
		}elseif(c<90){
			if("-a".equals(s1)){
				System.out.println("B");
			}else{
				System.out.println("良好");
			}
		}else{
			if("-a".equals(s1)){
				System.out.println("A");
			}else{
				System.out.println("优秀");
			}
		}
	}
}

D. 用java web实现 ‘视频录制 ，播放 ，保存‘功能

java web实现视频的基本很少，能完整运行的基本没有.视频录制只能使用flash，所以你搜一搜java falsh还是能搜到一些的