usestd::fs::File;usestd::io::{BufReader,BufRead};fn read_file_line_by_line(path:&str)->Result<(),Box<dyn std::error::Error>>{ letfile=File::open(path)?;let reader=BufReader::new(file);forlineinreader.lines(){matchline {// line是字符串Ok(line)=>process_line(line),Err(err)...
使用std::fs::File和std::io::Read模块可以读取二进制文件内容。以下是一个简单的示例: usestd::fs::File;usestd::io::prelude::*;fnmain() {letmutfile = File::open("file.bin").expect("file not found");letmutbuffer = [0;5]; file.read_exact(&mutbuffer).expect("something went wrong ...
复制 use std::fs::File;use std::io::Read;fnread_file(name:&str)->Result<String,std::io::Error>{letmut f=File::open(name)?;letmut contents=String::new();f.read_to_string(&mut contents)?;Ok(contents)} ?操作符 展开来就类似这样: 代码语言:javascript 复制 match result{Ok(v)=>v,...
usestd::io::{Read,stdin};usestd::env;usestd::fs::File;usestd::path::Path;usestd::io;fnmain(){letargs:Vec<String>=env::args().collect();letmutread_from:Box<dynRead>=ifargs.len()>1{letfpath=args.get(1).expect("cannot get argument!");letfile=File::open(Path::new(fpath))...
// Rust program to read text from a file.usestd::io::Read;fnmain(){letmutfileRef=std::fs::File::open("sample.txt").unwrap();letmutdata=String::new(); fileRef.read_to_string(&mutdata).unwrap(); print!("FILE DATA:\n{}", data); } ...
1、使用read_to_string方法 // 直接读取文件后存入到字符串,文件不存在则报错letcontent:String=read_to_string("file_path").unwrap(); 2、使用File::read方法 usestd::fs::File;usestd::io::Read;// open()是以只读方式打开文件。不能进行写入letmutfile: File = File::open("foo.txt").unwrap()...
use std::fs::{File, OpenOptions}; fn main() { let file = File::open("./test.txt").expect("文件不存在"); //文件权限 let f = OpenOptions::new() .read(true) //读取权限 .write(true) //写入权限 .create(true) //如果path出的文件不存在,创建一个 .append(true) //追加,不会删除...
let handle = Handle::from_path(path_to_read)?; if stdout_handle == handle { return Err(Error::new( ErrorKind::Other, "You are reading and writing to the same file", )); } else { let file = File::open(&path_to_read)?; ...
我们向文件写入三行信息,然后使用 BufRead::lines 创建的迭代器 Lines 读取文件,一次读回一行。File 模块实现了提供 BufReader 结构体的 Read trait。File::create 打开文件 File 进行写入,File::open 则进行读取。 代码语言:javascript 复制 use std::fs::File;use std::io::{Write,BufReader,BufRead,Error}...
cargo-rdme [cargo-rdme] - Cargo subcommand to create your README from your crate’s documentation. cargo-release - tool for releasing git-managed cargo project, build, tag, publish, doc and push cargo-script - lets people quickly and easily run Rust "scripts" which can make use of ...