可以使用serde_json::Value::as_object_mut方法将Value对象转换为可变的对象,并使用insert方法添加新的字段。例如: 代码语言:txt 复制 use serde_json::json; let mut object = value.as_object_mut().unwrap(); object.insert("new_field".to_string(), json!("new_value")); 最后,将修改后的...
of the key-value pairs. This module serializes IndexMap as a sequence of (key, value) elements instead, in order. From what I understand, feeding a HashMap and IndexMap to serde_json::to_string end up serializing in a different structure (not talking about order) For a HashMap<String...
let tmp: Value = json!([{"k":"v"}]); let v: Structxx = serde_json::from_value(tmp) .map_err(op: |err: Error|{ format!( "xx: {}", err.to_string() ) }).unwrap(); struct转json,再转Value,反序列化成了Object(HashMap<String, JsonValue>) let json_str = serde_json::to...
use serde_json; fn main() { let json_string = r#"{"0": "value1", "1": "value2", "2": "value3"}"#; let custom_map: CustomMap = serde_json::from_str(json_string).unwrap(); println!("{:?}", custom_map); } 这样,你就可以使用serde_json库来序列化和反序列化具有非...
创建json对象 use serde_json::{Value, json}; let mut t = json!({}); 添加新元素 t.as_object_mut().unwrap().insert(k.to_string, Value::String(v.to_string()));
to_string()); } Value::to_string()函数会将一个serde_json::Value转换成一个StringJSON 文本。 一个巧妙的事情json!宏,是可以在构建 JSON 值时,将变量和表达式直接插入到 JSON 值中。Serde 将在编译时,检查您插入的值是否能够表示为 JSON. let full_name = "John Doe"; let age_last_year = 42;...
name:String, age:u16, languages:Vec<String>, }, }fnmain() {lethuman= Animal::Human { name:"JiangBo".to_owned(), age:44, languages:vec!["Rust".to_owned(),"Java".to_owned()], };println!("{}", serde_json::to_string(&human).unwrap());// {"Human":{"name":"JiangBo","ag...
{ let dt = row.get::<_, NaiveDateTime>(i); let dt_string = serde_json::to_string(&dt.format("%Y-%m-%d %H:%M:%S").to_string()).unwrap(); serde_json::from_str(&dt_string).unwrap() } _ => Value::Null, }; record.insert(column.name().to_string(), value); } result....
addColumnToJsonKeyMappingsEntry(String key, String value) Add a single ColumnToJsonKeyMappings entry OpenXJsonSerDe clearColumnToJsonKeyMappingsEntries() Removes all the entries added into ColumnToJsonKeyMappings. OpenXJsonSerDe clone() boolean equals(Object obj) Boolean getCaseInsensitive...
addColumnToJsonKeyMappingsEntry(String key, String value) Add a single ColumnToJsonKeyMappings entry OpenXJsonSerDe clearColumnToJsonKeyMappingsEntries() Removes all the entries added into ColumnToJsonKeyMappings. OpenXJsonSerDe clone() boolean equals(Object obj) Boolean getCaseInsensitive...