在当今的数字化时代，远程工作和协作变得越来越普遍。为了满足这种需求，开发了一种允许计算机之间远程控制的程序。这种程序不仅可以提高工作效率，还可以在需要时提供技术支持。本文将详细介绍该程序的主要功能、实现方式以及如何使用它。
该远程桌面控制程序具有以下特点：
在开发这个项目时，最大的挑战之一是如何实现鼠标指针的移动、模拟键盘敲击以及屏幕捕获。经过一段时间的研究，发现了一个名为Robot的类，它能够满足所有的需求。此外，使用序列化来发送客户端屏幕截图到服务器，以及发送服务器事件（如鼠标移动、按键按下、按键释放）帮助编写了清晰而简单的代码，而不是以原始数据格式通过网络发送图像和事件。
Robot类提供了以下方法：
mouseMove：将鼠标指针移动到屏幕上的指定坐标。mousePress：按下鼠标上的一个按钮。mouseRelease：释放鼠标上的一个按钮。keyPress：按下键盘上的一个键。keyRelease：释放键盘上的一个键。createScreenCapture：捕获屏幕截图。程序由以下部分组成：
要运行程序，需要在两台不同的计算机上下载RemoteServer_source.zip和RemoteClient_source.zip，然后解压缩它们。在其中一台计算机（例如PC1）上，运行位于dist文件夹下的RemoteServer.jar，使用以下命令：
java -jar RemoteServer.jar
系统会要求输入服务器要监听的端口号，输入1024以上的任何端口号，例如5000。
在另一台计算机（例如PC2）上，使用以下命令执行RemoteClient.jar：
java -jar RemoteClient.jar
系统会要求输入服务器IP，输入PC1的IP地址，然后系统会要求输入端口号，输入上面输入的相同端口号，例如5000。
现在，在PC1上，可以完全控制PC2，包括移动鼠标、点击鼠标、键入键、查看PC2桌面等。
以下是RemoteServer和RemoteClient的代码结构：
System.out.println("Connecting to server ..........");
socket = new Socket(ip, port);
System.out.println("Connection Established.");
while (continueLoop) {
// Capture screen
BufferedImage image = robot.createScreenCapture(rectangle);
/*
I have to wrap BufferedImage with ImageIcon because
BufferedImage class does not implement Serializable interface
*/
ImageIcon imageIcon = new ImageIcon(image);
// Send captured screen to the server
try {
System.out.println("before sending image");
oos.writeObject(imageIcon);
oos.reset();
// Clear ObjectOutputStream cache
System.out.println("New screenshot sent");
} catch (IOException ex) {
ex.printStackTrace();
}
// wait for 100ms to reduce network traffic
try {
Thread.sleep(100);
} catch (InterruptedException e){
e.printStackTrace();
}
}
while (continueLoop) {
// receive commands and respond accordingly
System.out.println("Waiting for command");
int command = scanner.nextInt();
System.out.println("New command: " + command);
switch (command) {
case -1:
robot.mousePress(scanner.nextInt());
break;
case -2:
robot.mouseRelease(scanner.nextInt());
break;
case -3:
robot.keyPress(scanner.nextInt());
break;
case -4:
robot.keyRelease(scanner.nextInt());
break;
case -5:
robot.mouseMove(scanner.nextInt(), scanner.nextInt());
break;
}
}
// Listen to server port and accept clients connections
while (true) {
Socket client = sc.accept();
System.out.println("New client Connected to the server");
// Per each client create a ClientHandler
new ClientHandler(client, desktop);
}
while (continueLoop) {
// Receive client screenshot and resize it to the current panel size
ImageIcon imageIcon = (ImageIcon) cObjectInputStream.readObject();
System.out.println("New image received");
Image image = imageIcon.getImage();
image = image.getScaledInstance(cPanel.getWidth(), cPanel.getHeight(), Image.SCALE_FAST);
// Draw the received screenshot
Graphics graphics = cPanel.getGraphics();
graphics.drawImage(image, 0, 0, cPanel.getWidth(), cPanel.getHeight(), cPanel);
}
public void mouseMoved(MouseEvent e) {
double xScale = clientScreenDim.getWidth() / cPanel.getWidth();
System.out.println("xScale: " + xScale);
double yScale = clientScreenDim.getHeight() / cPanel.getHeight();
System.out.println("yScale: " + yScale);
System.out.println("Mouse Moved");
writer.println(EnumCommands.MOVE_MOUSE.getAbbrev());
writer.println((int)(e.getX() * xScale));
writer.println((int)(e.getY() * yScale));
writer.flush();
}
public void mousePressed(MouseEvent e) {
System.out.println("Mouse Pressed");
writer.println(EnumCommands.PRESS_MOUSE.getAbbrev());
int button = e.getButton();
int xButton = 16;
if (button == 3) {
xButton = 4;
}
writer.println(xButton);
writer.flush();
}
public void mouseReleased(MouseEvent e) {
System.out.println("Mouse Released");
writer.println(EnumCommands.RELEASE_MOUSE.getAbbrev());
int button = e.getButton();
int xButton = 16;
if (button == 3) {
xButton = 4;
}
writer.println(xButton);
writer.flush();
}
public void keyPressed(KeyEvent e) {
System.out.println("Key Pressed");
writer.println(EnumCommands.PRESS_KEY.getAbbrev());
writer.println(e.getKeyCode());
writer.flush();
}
public void keyReleased(KeyEvent e) {
System.out.println("Mouse Released");
writer.println(EnumCommands.RELEASE_KEY.getAbbrev());
writer.println(e.getKeyCode());
writer.flush();
}