如何使用Serde使用顶级数组反序列化JSON? [英] How can I deserialize JSON with a top-level array using Serde?

问题描述

我有一些从Web服务返回的JSON数据. JSON是顶级数组:

I have a some JSON data that is returned from a web service. The JSON is a top-level array:

[
    {
        "data": "value1"
    },
    {
        "data": "value2"
    },
    {
        "data": "value3"
    }
]

使用serde_derive使struct s可以反序列化数组中包含的数据，但是，我无法让Serde反序列化顶级数组.

Using serde_derive to make structs I can can deserialize the data contained within the array, however, I am unable to get Serde to deserialize the top-level array.

我是否缺少某些内容，还是Serde不能对顶级数组进行反序列化?

Am I missing something, or can Serde not deserialize top level-arrays?

推荐答案

您可以使用Vec:

extern crate serde;
extern crate serde_json;

#[macro_use]
extern crate serde_derive;

use serde_json::Error;

#[derive(Serialize, Deserialize, Debug)]
struct Foo {
    data: String,
}

fn typed_example() -> Result<(), Error> {
    let data = r#"[
        {
            "data": "value1"
        },
        {
            "data": "value2"
        },
        {
            "data": "value3"
        }
    ]"#;

    let array: Vec<Foo> = serde_json::from_str(data)?;

    for elem in array.iter() {
        println!("{:?}", elem);
    }
    Ok(())
}

fn main() {
    typed_example().unwrap();
}

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