如何将字节向量(u8)转换为字符串? [英] How do I convert a Vector of bytes (u8) to a string?

问题描述

我正在尝试用 Rust 编写简单的 TCP/IP 客户端，我需要打印出我从服务器获得的缓冲区.

I am trying to write simple TCP/IP client in Rust and I need to print out the buffer I got from the server.

如何将 Vec(或 &[u8])转换为 String?

How do I convert a Vec<u8> (or a &[u8]) to a String?

推荐答案

要将字节片转换为字符串片(假设为 UTF-8 编码):

To convert a slice of bytes to a string slice (assuming a UTF-8 encoding):

use std::str;

//
// pub fn from_utf8(v: &[u8]) -> Result<&str, Utf8Error>
//
// Assuming buf: &[u8]
//

fn main() {

    let buf = &[0x41u8, 0x41u8, 0x42u8];

    let s = match str::from_utf8(buf) {
        Ok(v) => v,
        Err(e) => panic!("Invalid UTF-8 sequence: {}", e),
    };

    println!("result: {}", s);
}

转换是就地的，不需要分配.如有必要，您可以通过在字符串切片上调用 .to_owned() (其他选项可用).

The conversion is in-place, and does not require an allocation. You can create a String from the string slice if necessary by calling .to_owned() on the string slice (other options are available).

转换函数的库参考:

• std::str::from_utf8

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