• 本人学习笔记代码，学习自B站大佬

cargo new s1 && cd s1

cargo new tcpserver

cargo new tcpcline

运行项目server
cargo run -p tcpserver

打开新cmd运行项目cline
# cargo run -p tcpcline

[workspace]
members = ["tcpserver", "tcpcline"]

use std::io::{Read, Write};
use std::net::TcpListener;
use std::str;  // 引入字符串转换包

fn main() {
    // 设置监听端口和地址
    let listener = TcpListener::bind("127.0.0.1:3000").unwrap();
    println!("running on port 3000....");
    // 请求进来
    for stream in listener.incoming() {
        // 设置为可变
        let mut stream = stream.unwrap();
        println!(" Connection established");

        // 设置接收缓冲区
        let mut buffer = [0; 1024];
        // 服务端接收数据
        stream.read(&mut buffer).unwrap();
        // println!(
        //     "Request from cline:{:?}",
        //     str::from_utf8(&buffer).unwrap() // 转换为utf8格式
        // );
        // 服务端返回数据
        stream.write(&mut buffer).unwrap();
    }
}

use std::io::{Read, Write};
use std::net::TcpStream;
use std::str;  // 引入字符串转换包

fn main() {
    println!("Hello, world!");
    let mut stream = TcpStream::connect("127.0.0.1:3000").unwrap();
    // 转换为字节类型，向服务器发送
    stream.write("Hello".as_bytes()).unwrap();

    let mut buffer = [0; 5]; // 注意括号里格式
    // 读取服务器返回的消息
    stream.read(&mut buffer).unwrap();

    println!(
        "Response from server:{:?}",
        str::from_utf8(&buffer).unwrap() // 转换为utf8格式
    );
    
}