JSON with Serde

Serialize and deserialize JSON with serde_json.

Difficulty

Intermediate

Code

use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Debug)]
struct Config {
    name: String,
    version: String,
    debug: bool,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let config = Config {
        name: "myapp".into(),
        version: "1.0.0".into(),
        debug: true,
    };

    let json = serde_json::to_string_pretty(&config)?;
    println!("{}", json);

    let parsed: Config = serde_json::from_str(&json)?;
    println!("{:?}", parsed);

    Ok(())
}

Explanation

This example demonstrates how to use json with serde in Rust. Read the code carefully to understand the flow. Pay attention to where values are created, borrowed, moved, or consumed.

Key Concepts

• Rust's strong type system catches errors at compile time
• Ownership and borrowing rules ensure memory safety
• Pattern matching makes code expressive and exhaustive

Related Topics

Browse more examples in the serialization category to build a complete understanding of this topic.