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language contributors translators filename lang
json
Anna Harren
https://github.com/iirelu
Zach Zhang
https://github.com/checkcheckzz
learnjson-cn.json zh-cn

JSON是一个极其简单的数据交换格式。按json.org说的,它对人类易读易写,对机器易解析易生成。

一段JSON可以是下文列出的类型的任意值但实际一般按以下两种方式之一呈现

  • 一个键值对的集合({ })。按不同语言,这可能被理解为对象/记录/结构体/字典/哈希表/有键列表/关联数组
  • 一个有序的值列表([ ])。按不同语言,这可能被理解为数组/向量/列表/序列

纯正的JSON实际上没有注释但是大多数解析器都接受C-风格(//, /* */)的注释。一些解析器还容许trailing comma即最后一个数组元素或最后一个对象属性之后的逗号。不过为了兼容性最好避免。

因此本教程的一切都会是100%有效的JSON。幸亏它的表达能力很丰富。

支持的数据类型:

  • 字符串:"hello""\"A quote.\"""\u0abe""Newline.\n"
  • 数字:230.1112e103.141e-101.23e+4
  • 对象:{ "key": "value" }
  • 数组:["Values"]
  • 其它:truefalsenull
{
  "key": "value",

  "keys": "must always be enclosed in double quotes",
  "numbers": 0,
  "strings": "Hellø, wørld. All unicode is allowed, along with \"escaping\".",
  "has bools?": true,
  "nothingness": null,

  "big number": 1.2e+100,

  "objects": {
    "comment": "Most of your structure will come from objects.",

    "array": [0, 1, 2, 3, "Arrays can have anything in them.", 5],

    "another object": {
      "comment": "These things can be nested, very useful."
    }
  },

  "silliness": [
    {
      "sources of potassium": ["bananas"]
    },
    [
      [1, 0, 0, 0],
      [0, 1, 0, 0],
      [0, 0, 1, "neo"],
      [0, 0, 0, 1]
    ]
  ],

  "alternative style": {
    "comment": "check this out!"
  , "comma position": "doesn't matter, if it's before the next key, it's valid"
  , "another comment": "how nice"
  },



  "whitespace": "Does not matter.",



  "that was short": "And done. You now know everything JSON has to offer."
}

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