JavaSE-21.3.7【TCP通信程序练习6】

package day12.lesson3.p6;

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

/*
3.8 TCP通信程序练习6

    案例需求
        客户端：数据来自于文本文件，接收服务器反馈
        服务器：接收到的数据写入文本文件，给出反馈，代码用线程进行封装，为每一个客户端开启一个线程
    案例分析
        创建客户端对象，创建输入流对象指向文件，每读入一行数据就给服务器输出一行数据，输出结束后使用shutdownOutput()方法告知服务端传输结束
        创建多线程类，在run()方法中读取客户端发送的数据，为了防止文件重名，使用计数器给文件名编号，接受结束后使用输出流给客户端发送反馈信息。
        创建服务端对象，每监听到一个客户端则开启一个新的线程接受数据。
        客户端接受服务端的回馈信息
 */
public class ClientDemo {
    public static void main(String[] args) throws IOException{
        Socket s = new Socket("MSI-YUBABY", 10000);

        BufferedReader br = new BufferedReader(new FileReader("stage2\\src\\day12\\lesson3\\p6\\src.txt"));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

        String line;
        while ((line=br.readLine()) != null){
            bw.write(line);
            bw.newLine();
            bw.flush();
        }

        s.shutdownOutput(); //表示输出结束

        //接收反馈
        BufferedReader brClient = new BufferedReader(new InputStreamReader(s.getInputStream()));
        String data = brClient.readLine(); //
        System.out.println("服务器的反馈：" + data);

        br.close();
        s.close();
    }
}

package day12.lesson3.p6;

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

public class ServerDemo {
    public static void main(String[] args) throws IOException {
        ServerSocket ss = new ServerSocket(10000);

        while (true){
            Socket s = ss.accept();
            new Thread(new ServerThread(s)).start();
        }

//        ss.close(); //实际上，一般来说服务器是不关闭了，所以此处先不close了
    }
}

class ServerThread implements Runnable{
    private Socket s;

    public ServerThread(Socket s) {
        this.s = s;
    }

    @Override
    public void run() {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
//            BufferedWriter bw = new BufferedWriter(new FileWriter("stage2\\src\\day12\\lesson3\\p6\\tar.txt"));

            //解决名称冲突问题(场景：服务器打开一个不动，多个客户端上交同名文件)
            int count = 0;
            File file = new File("stage2\\src\\day12\\lesson3\\p6\\tar[" + count + "].txt");
            while (file.exists()){
                count++;
                file = new File("stage2\\src\\day12\\lesson3\\p6\\tar[" + count + "].txt");
            }
            BufferedWriter bw = new BufferedWriter(new FileWriter(file));

            String linel;
            while ((linel=br.readLine()) != null){
                bw.write(linel);
                bw.newLine();
                bw.flush();
            }

            //给出反馈
            BufferedWriter bwServer = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
            bwServer.write("文件上传成功");
            bwServer.newLine();
            bwServer.flush();

            s.close();
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

src.txt

hello
world
java
886
do u love it?
i love it very much

tar.txt    tar[0].txt    tar[1].txt     tar[...].txt

hello
world
java
886
do u love it?
i love it very much