Rust JSON操作之合并两个JSON对象

use serde_json::Value;
 
/// 合并两个JSON对象
fn merge_json(obj_a: Value, obj_b: Value) -> Value {
  let map_a = obj_a.as_object();
  let map_b = obj_b.as_object();
 
  // 任意参数转为 Object 失败直接返回
  if map_a.is_none() || map_b.is_none() {
    return Value::Null;
  }
 
  let map_a = map_a.unwrap();
  let map_b = map_b.unwrap();
 
  let mut data = map_a.clone();
 
  for (key, value) in map_b.iter() {
    data.insert(key.into(), value.clone());
  }
 
  Value::Object(data)
}

use serde_json::json;
 
fn main() {
  let a = json!({
    "id": 1,
    "name": "Alex",
    "age": 18,
  });
 
  let b = merge_json(a, json!({
    "name": "bob",
  }));
 
  println!("合并后： {:?}", b);
}

合并后：Object {"age": Number(18), "id": Number(1), "name": String("bob")}