使用java写出代码。 文件上传案例需求如下 客户端将本地文件上传到服务器接收服务器的反馈 服务器接收客户端上传的文件上传完毕后给出反馈1、服务器代码优化：循环 需求：通过循环完成多次上传完成代码 问题：多次上传虽然成功控制台也有成功提示但是由于文件名写死了1png新的上传会覆盖旧的文件所以始终只能看到一个文件 解决：目前通过定义整数变量给文件命名每次上传让

客户端代码：

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

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("localhost", 8888);
        File file = new File("test.txt");
        InputStream inputStream = new FileInputStream(file);
        OutputStream outputStream = socket.getOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        socket.shutdownOutput();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        String message = bufferedReader.readLine();
        System.out.println("服务器反馈：" + message);
        bufferedReader.close();
        outputStream.close();
        inputStream.close();
        socket.close();
    }
}

服务器代码：

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        int count = 1;
        while (true) {
            Socket socket = serverSocket.accept();
            InputStream inputStream = socket.getInputStream();
            File file = new File("test" + count + ".txt");
            OutputStream outputStream = new FileOutputStream(file);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, len);
            }
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            bufferedWriter.write("上传成功！");
            bufferedWriter.newLine();
            bufferedWriter.flush();
            System.out.println("第" + count + "次上传成功！");
            count++;
            outputStream.close();
            inputStream.close();
            socket.close();
        }
    }
}
``