Rust编程知识拾遗：Rust 编程，读取文件

读取文件

将文件读取成二进制，使用read函数

use std::fs;

fn main() {

let context = fs::read("tt").unwrap();

println!("context: {:#?}", context);

}

将文件读取成字符串

use std::fs;

fn main() {

let context = fs::read_to_string("tt").unwrap();

println!("context: {}", context);

}

读取目录

use std::io;

use std::fs;

use std::path::Path;

fn visit_dirs(dir: &Path) -> io::Result {

if dir.is_dir() {

for entry in fs::read_dir(dir)? {

let entry = entry?;

let path = entry.path();

if path.is_dir() {

visit_dirs(&path)?;

} else {

let c = fs::read_to_string(path).unwrap();

println!("file = {}", c);

}

}

}

Ok(())

}

fn main() {

//let context = fs::read("tt").unwrap();

//println!("context: {:#?}", context);

//let context = fs::read_to_string("tt").unwrap();

//println!("context: {}", context);

visit_dirs(Path::new("./test")).unwrap();

}