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83 lines
2.4 KiB
Markdown
83 lines
2.4 KiB
Markdown
---
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language: JSON
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contributors:
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- ["Anna Harren", "https://github.com/iirelu"]
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translators:
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- ["Zach Zhang", "https://github.com/checkcheckzz"]
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filename: learnjson-cn.json
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---
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JSON是一个极其简单的数据交换格式。按[json.org](https://json.org)说的，它对人类易读易写，对机器易解析易生成。
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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：
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* 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
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* 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
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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。
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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。
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支持的数据类型：
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* 字符串：`"hello"`、`"\"A quote.\""`、`"\u0abe"`、`"Newline.\n"`
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* 数字：`23`、`0.11`、`12e10`、`3.141e-10`、`1.23e+4`
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* 对象：`{ "key": "value" }`
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* 数组：`["Values"]`
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* 其它：`true`、`false`、`null`
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```json
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{
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"key": "value",
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"keys": "must always be enclosed in double quotes",
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"numbers": 0,
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"strings": "Hellø, wørld. All unicode is allowed, along with \"escaping\".",
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"has bools?": true,
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"nothingness": null,
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"big number": 1.2e+100,
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"objects": {
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"comment": "Most of your structure will come from objects.",
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"array": [0, 1, 2, 3, "Arrays can have anything in them.", 5],
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"another object": {
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"comment": "These things can be nested, very useful."
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}
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},
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"silliness": [
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{
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"sources of potassium": ["bananas"]
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},
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[
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[1, 0, 0, 0],
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[0, 1, 0, 0],
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[0, 0, 1, "neo"],
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[0, 0, 0, 1]
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]
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],
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"alternative style": {
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"comment": "check this out!"
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, "comma position": "doesn't matter, if it's before the next key, it's valid"
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, "another comment": "how nice"
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},
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"whitespace": "Does not matter.",
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"that was short": "And done. You now know everything JSON has to offer."
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}
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```
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## 进一步阅读
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* [JSON.org](https://www.json.org/json-zh.html) 完美图解JSON的一切
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* [JSON Tutorial](https://www.youtube.com/watch?v=wI1CWzNtE-M) 简要介绍
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