Question

我正在尝试将从客户端捕获的图像发送到服务器，使用机器人类捕获图像并写入客户端套接字。在服务器中，我正在读取缓冲的图像并写入服务器本地存储区域。我希望客户端定期捕获屏幕截图并发送到server.server将图像和存储读取到其存储库中。

public class ServerDemo {
   public static void main(String[] args) {
     try {

        ServerSocket serversocket=new ServerSocket(6666);
        System.out.println("server listening..........");

        while(true)
        {
         Thread ts=new Thread( new ServerThread(serversocket.accept()));
         ts.start();
         System.out.println("server thread started.........");
        }
     } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       }

   }

 }

ServerThread.java

public class ServerThread implements Runnable {
Socket s;
BufferedImage img = null;
String savelocation="d:\\Screenshot\\";

   public ServerThread(Socket server) {
    this.s=server;
   }
 @Override
    public void run() {

    try {
        System.out.println("trying to read Image");
        img = ImageIO.read(s.getInputStream());
       System.out.println("Image Reading successful.....");
    } catch (IOException e) {
            System.out.println(e);
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
      File save_path=new File(savelocation);
      save_path.mkdirs();
        try {
            ImageIO.write(img, "JPG",new File(savelocation+"img-"+System.currentTimeMillis()+".jpg"));
         System.out.println("Image writing successful......");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println(e);
            e.printStackTrace();
        }
     }
    }

ClientDemo.java

 public class ClientDemo {
     public static void main(String[] args) throws InterruptedException {
      try {
        Socket client=new Socket("localhost", 6666);
        while(true)
        {
            System.out.println("Hello");
            Thread th=new Thread(new ClientThread(client));
            th.start();
            System.out.println("Thread started........");
            th.sleep(1000*60);

        }
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
   }

 }

ClientThread.java

 public class ClientThread implements Runnable{
 Socket c;
  public ClientThread(Socket client) {
  this.c=client;
  }

@Override
public void run() {

    try {
        System.out.println("client");
        //while(true){
        Dimension size=Toolkit.getDefaultToolkit().getScreenSize();
        Robot robot=new Robot();
        BufferedImage img=robot.createScreenCapture(new Rectangle(size));
        System.out.println("Going to capture client screen");

        ImageIO.write(img, "JPG", c.getOutputStream());
        System.out.println("Image capture from client success...!");



    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (AWTException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }  

    }


   }

服务器控制台

服务器监听..........

服务器线程已启动.........

尝试阅读图片

图像阅读成功.....

图像写作成功......

客户端控制台你好

线程开始........

客户端

要捕捉客户端屏幕

客户成功的图像捕捉......！

您好

线程开始........

客户端

要捕获客户端屏幕你好

线程开始........

客户端

要捕捉客户端屏幕

重复这样。这段代码在失败之后第一次完美运行。每次运行它只捕获图像一次。我必须做什么改变才能定期捕获和写入图像...请帮助我

Answer 1

Try this in ClientDemo.java
        while(true)
        {
            System.out.println("Hello");
            Socket client=new Socket("localhost", 6666);
            Thread th=new Thread(new ClientThread(client));
            th.start();
            System.out.println("Thread started........");
            th.sleep(1000*60);

        }
And make sure that you close the client socket once the thread(ClientThread.java) is completed may be in finally block or at the end of code.

Answer 2

对于服务器端，您不需要ImageIO。只需发送和接收字节：

while ((count = in.read(buffer()) > 0)
{
    out.write(buffer, 0, count);
}

Answer 3

我发现问题出在服务器上。第一次接受来自客户端的连接时，

Thread ts=new Thread( new ServerThread(serversocket.accept()));

但客户端只连接一次

Socket client=new Socket("localhost", 6666);

当第一次转移时完成服务器再次停留在等待客户端进行再次连接的连接。因此，您应该只发出一个accept并在每次传输时使用该套接字，或者在客户端和服务器上关闭这两个套接字，然后再次进行accept / connect。

从客户端到服务器在套接字上发送缓冲映像

3 个答案: