（java）实现从客户端向服务器发送文件,发送完成后,服务器回复发送成功,客户端接收打印信息.

客户端：

package com.ffyc.javanet.demo2;

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

public class Client {
    public static void main(String[] args) throws IOException {

        Socket socket = new Socket("127.0.0.1",9999);
            FileInputStream fin = new FileInputStream("D:/temp.txt");
            OutputStream output = socket.getOutputStream();
            byte[] b = new byte[100];
            int size = 0;
            while ((size = fin.read(b)) != -1) {
                output.write(b, 0, size);
            }

            socket.shutdownOutput();//客户端告诉服务器已经发送完毕
            System.out.println("发送完毕");
            DataInputStream input = new DataInputStream(socket.getInputStream());
            System.out.println( input.readUTF());

        }
    }

服务器端：

package com.ffyc.javanet.demo2;

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(9999);
        System.out.println("服务器准备就绪！");
        Socket socket = serverSocket.accept();
        System.out.println("服务器端连接成功");

            InputStream input = socket.getInputStream();
            FileOutputStream fout = new FileOutputStream("D:/temp1.txt");
            byte[] b = new byte[100];
            int size = 0;
            while ((size = input.read(b)) != -1) {
                fout.write(b, 0, size);
            }
            DataOutputStream output = new DataOutputStream(socket.getOutputStream());
            output.writeUTF("服务器收到");

    }
}

运行结果：