Rust 读写csv文件
在Rust中，可以使用csv等库来高性能读写CSV文件。
首先，需要在Cargo.toml文件中添加依赖项：
[dependencies]
csv = "1.1"
分别定义读写CSV文件函数：
- csv_file.rs
use csv::ReaderBuilder;
use csv::WriterBuilder;
use std::fs::File;pub fn read_csv_file(path: &str) -> Result<(), csv::Error> {let file = File::open(path)?;let mut reader = ReaderBuilder::new().from_reader(file);for result in reader.records() {let record = result?;// 处理每一行的数据println!("{:?}", record);}Ok(())
}pub fn write_csv_file(path: &str, headers: Vec<String>, records: Vec<Vec<String>>) -> Result<(), csv::Error> {let file = File::create(path)?;let mut writer = WriterBuilder::new().from_writer(file);writer.write_record(headers)?;for record in records {writer.write_record(record)?;writer.flush()?;}Ok(())
}
写入数据，再读取数据示例：
- main.rs
mod utils;
mod macros;fn main() {// 保存的文件路径和文件名let path = "D://file.csv";// 写入CSV文件头let headers = vec_s!["number", "Name", "Age", "City"];let mut records = vec![];// 写入CSV文件内容for i in 0..10 {records.push(vec_s![i, "Alice", "30", "New York"]);records.push(vec_s![i, "Bob", "25", "San Francisco"]);records.push(vec_s![i, "Charlie", "22", "Los Angeles"]);}utils::csv_file::write_csv_file(path, headers, records).expect("Failed to write CSV file");utils::csv_file::read_csv_file(path).expect("Failed to read CSV file");
}vec_s!是一个保存字符串类型的宏，该文章进行了详细讲解：Rust 宏