用 ServerSocket 写一个 接收图片A 并返回图片B的代码

以下是使用 ServerSocket 接收图片A 并返回图片B 的 Java 代码：

import java.io.*;
import java.net.*;

public class ImageServer {
    private static final int PORT = 8888; // 服务端口号

    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(PORT);
        System.out.println("Image server started on port " + PORT);

        while (true) {
            Socket socket = serverSocket.accept();
            System.out.println("Client connected: " + socket.getInetAddress().toString());

            // 读取客户端发送的图片A
            InputStream inputStream = socket.getInputStream();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len;
            while ((len = inputStream.read(buffer)) != -1) {
                byteArrayOutputStream.write(buffer, 0, len);
            }
            byte[] imageA = byteArrayOutputStream.toByteArray();

            // 处理图片A并生成图片B
            byte[] imageB = processImage(imageA);

            // 返回图片B给客户端
            OutputStream outputStream = socket.getOutputStream();
            outputStream.write(imageB);

            // 关闭连接
            socket.close();
        }
    }

    private static byte[] processImage(byte[] imageA) {
        // TODO: 处理图片A并生成图片B
        return imageA;
    }
}

客户端发送图片A的代码可以参考以下示例：

import java.io.*;
import java.net.*;

public class ImageClient {
    private static final String SERVER_ADDRESS = "localhost"; // 服务端地址
    private static final int SERVER_PORT = 8888; // 服务端口号

    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(SERVER_ADDRESS, SERVER_PORT);
        System.out.println("Connected to server: " + socket.getInetAddress().toString());

        // 发送图片A到服务端
        OutputStream outputStream = socket.getOutputStream();
        FileInputStream fileInputStream = new FileInputStream(new File("path/to/imageA.jpg"));
        byte[] buffer = new byte[1024];
        int len;
        while ((len = fileInputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        fileInputStream.close();

        // 接收服务端返回的图片B
        InputStream inputStream = socket.getInputStream();
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        buffer = new byte[1024];
        while ((len = inputStream.read(buffer)) != -1) {
            byteArrayOutputStream.write(buffer, 0, len);
        }
        byte[] imageB = byteArrayOutputStream.toByteArray();

        // 保存图片B到本地
        FileOutputStream fileOutputStream = new FileOutputStream(new File("path/to/imageB.jpg"));
        fileOutputStream.write(imageB);
        fileOutputStream.close();

        // 关闭连接
        socket.close();
    }
}

注意，以上代码仅供参考，实际应用时需要根据具体需求进行修改。例如，图片处理部分需要根据实际情况进行实现。