先來看一段golang
package main
import (
"encoding/json"
"fmt"
)
func main() {
data := map[string]string{
"str0": "Hello, world",
"str1": "<",
"str2": ">",
"str3": "&",
}
jsonStr, _ := json.Marshal(data)
fmt.Println(string(jsonStr))
}
輸出結(jié)果
{"str0":"Hello, world","str1":"\u003c","str2":"\u003e","str3":"\u0026"}
先來段rust的
extern crate rustc_serialize;
use rustc_serialize::json;
use std::collections::HashMap;
fn main(){
let mut data = HashMap::new();
data.insert("str0","Hello, world");
data.insert("str1","<");
data.insert("str2",">");
data.insert("str3","&");
println!("{}", json::encode(&data).unwrap());
}
}
結(jié)果
{"str0":"Hello, world","str2":">","str1":"<","str3":"&"}
再來看段python的
import json
data = dict(str0='Hello, world',str1='<',str2='>',str3='&')
print(json.dumps(data))
輸出結(jié)果
{"str0": "Hello, world", "str1": "<", "str2": ">", "str3": "&"}
再看看java的
import org.json.simple.JSONObject;
class JsonDemo
{
public static void main(String[] args)
{
JSONObject obj = new JSONObject();
obj.put("str0", "Hello, world");
obj.put("str1", "<");
obj.put("str2", ">");
obj.put("str3", "&");
System.out.println(obj);
}
}
輸出結(jié)果
{"str3":"&","str1":"<","str2":">","str0":"Hello, world"}
可以看到python、rust和java對這4個字符串序列化結(jié)果幾乎是相同的了(除了java序列化后順序有微小變化外）蚜枢，golang明顯對 < ,
> , & 進行了轉(zhuǎn)義處理齐蔽，看看文檔怎么說的
// String values encode as JSON strings coerced to valid UTF-8,
// replacing invalid bytes with the Unicode replacement rune.
// The angle brackets "<" and ">" are escaped to "\u003c" and "\u003e"
// to keep some browsers from misinterpreting JSON output as HTML.
// Ampersand "&" is also escaped to "\u0026" for the same reason.
& 被轉(zhuǎn)義是為了防止一些瀏覽器將JSON輸出曲解為HTML锣光，
而 < ,> 被強制轉(zhuǎn)義是因為golang認為這倆是無效字節(jié)（這點比較奇怪）巫玻，
我如果技術(shù)棧都是golang還好說，如果跨語言跨部門合作一定需要注意這點（已踩坑）……
