详解Rust中的workspace

目录

一、目录结构二、子crata中的Cargo.toml声明三、代码引用3.1 model/src/lib.rs3.2 view/src/lib.rs3.3 controller/src/main.rs

java项目中用maven管理代码时，如果遇到大型工程，一般会拆分成不同的模块，比如spring-mvc中，通常会按model, view, controller建3个模块，然后根据一定的依赖关系进行引用。这个概念在Rust中是通用的，只不过maven换成了cargo，而模块变成了crate，看下面的例子。

一、目录结构

ahttp://www.easck.comckage]name = "model"version = "0.1.0"edition = "2021"# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html[dependencies]# 不依赖其它crate,此节点为空即可

view/Cargo.toml

[package]name = "view"version = "0.1.0"edition = "2021"# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html[dependencies]# 声明依赖modelmodel = {path = "../model"}

controll/Cargo.toml

[package]name = "controller"version = "0.1.0"edition = "2021"# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html[dependencies]model = {path = "../model"}view = {path = "../view"}

三、代码引用

有了前面的各crate依赖声明，就可以来写代码了，参见下面的示例：

3.1 model/src/lib.rs

#[derive(Debug)]pub struct User{   pub username:String,   pub password:String}#[derive(Debug)]pub struct Order{    pub orderno:St

假设在model中定义了2个结构体(即:OOP中的class)

3.2 view/src/lib.rs

//使用model中的User类use model::User;pub fn get_login_info(name:String,pass:String)->User{    User{        username:name,        password:pass    }}

3.3 controller/src/main.rs

use view::get_login_info;use model::{User,Order};fn main() {    let mut u = get_login_info(String::from("test"), String::from("123456"));    u.password = String::from("abcde");    println!("{:?}", u);     let o = Order{        orderno:String::from("20211244123")    };    println!("{:?}",o);     let u1 = User{        username:String::from("abcd"),        password:String::from("*123*J")    };    println!("{:?}",u1);}

运行结果：

User { username: "test", password: "abcde" }
Order { orderno: "20211244123" }
User { username: "abcd", password: "*123*J" }