先来看一段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))

}

输出结果

{"str0":"Hello, world","str1":"\u003c","str2":"\u003e","str3":"\u0026"}

先来段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());

}

}

结果

{"str0":"Hello, world","str2":">","str1":"

再来看段python的

import json

data = dict(str0='Hello, world',str1='',str3='&')

print(json.dumps(data))

输出结果

{"str0": "Hello, world", "str1": "", "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);

}

}

输出结果

{"str3":"&","str1":"","str0":"Hello, world"}

可以看到python、rust和java对这4个字符串序列化结果几乎是相同的了(除了java序列化后顺序有微小变化外)，golang明显对 < ,

> , & 进行了转义处理，看看文档怎么说的

// String values encode as JSON strings coerced to valid UTF-8,

// replacing invalid bytes with the Unicode replacement rune.

// The angle brackets "" 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.

& 被转义是为了防止一些浏览器将JSON输出曲解为HTML，

而 < ,> 被强制转义是因为golang认为这俩是无效字节(这点比较奇怪)，

我如果技术栈都是golang还好说，如果跨语言跨部门合作一定需要注意这点(已踩坑)……