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java - 使用套接字将图像从客户端发送到服务器

问题描述

我想将图像从客户端发送到 java 中的服务器。我发现一种方法是使用套接字。我的代码如下：

服务器端：线程等待客户端套接字并在客户端连接时接收图像：

@Override
public void run() {
    while (running) {   
        try(Socket clientSocket = serverSocket.accept();
            PrintWriter outText = new PrintWriter(clientSocket.getOutputStream(), true);
            BufferedReader intText = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        ) {

            try {
                // Get image info
                String imageInfo = inText.readLine();
                BufferedImage image = ImageIO.read(ImageIO.createImageInputStream(clientSocket.getInputStream()));

                // Handle input
                String[] split = imageInfo.split(";");
                String typeStr = split[0];
                String name = split[1];
                ServerImageType type = ServerImageType.fromInt(Integer.valueOf(typeStr));

                // Save image
                SaveImageThread saveImageThread = new SaveImageThread(image, name, type);
                saveImageThread.start();

                // Respond
                outText.println(name + " OK");

            } catch (IOException e) {
                System.err.out("The server is in pain: " + e);
            } 
        }
    }

    try {
        serverSocket.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

客户端：

public void sendImage(BufferedImage image, String name, ServerImageType imageType) throws IOException {
    try(Socket clientSocket = new Socket(serverName, txPort);
           PrintWriter outText = new PrintWriter(clientSocket.getOutputStream(), true);
           BufferedReader inText = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))
    ) {
        // Send image info
        String imageInfo = imageType.getId() + ";" + name;
        outText.println(imageInfo);

        // Send image
        ImageIO.write(image, "JPG", clientSocket.getOutputStream());

        // Receive acknowledgement
        String input = inText.readLine();
        System.out.println("Server answered: " + input);
    }
}

问题：服务器卡在ImageIO.read(... line.. 有什么想法吗？

标签： javaimagesockets

解决方案

我没有看到 clientSocket.getOutputStream().flush()。

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