Rust基础(12)-文件读写

操作文件

文件的读取、目录的递归

use std::fs;
use std::io;
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("./test/tt1").unwrap();
    println!("content = {:#?}", context);

    let context = fs::read_to_string("./test/tt1").unwrap();
    println!("content = {:#?}", context);

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

总结

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