查看Json库的源代码


[http://www.json.org/json-zh.html JSON 介绍]  



json library from [https://github.com/bblanchon/ArduinoJson github arduino Json]

[https://github.com/bblanchon/ArduinoJson/wiki Github arduino json wiki] | [http://www.yfrobot.com/thread-11875-1-1.html JSON Library 论坛简介贴地址]

download from the address：[https://github.com/bblanchon/ArduinoJson/releases zip address]

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Welcome to the user manual for the Arduino JSON library, an elegant and efficient JSON library for embedded systems.

It's designed to have the most intuitive API, the smallest footprint and works without any allocation on the heap (no malloc).

It has been written with Arduino in mind, but it isn't linked to Arduino libraries so you can use this library in any other C++ project.

[https://github.com/bblanchon/ArduinoJson/wiki/Using%20the%20library%20with%20Arduino Using the library with Arduino]

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<font color="orange" size="+2">'''Examples'''</font><br>
<br>
:-[[ IndentedPrintExample]] : Indented Print - 缩进打印例程

:-[[ JsonGeneratorExample]] : Json Generator - Json 生成例程

:-[[ JsonHttpClient]] : Json Http Client -  Json HTTP Client例程（获取网络Json数据并解析）

:-[[ JsonParserExample]] : Json Parser - Json 解析例程

:-[[ JsonServer]] : Json Server - Json Server例程（生成Json数据并发布）

:-[[ JsonUdpBeacon]] : Json Udp Beacon - Json UDP Beacon 例程


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<font color="orange" size="+2">'''Json Library Reference'''</font><br><br>

- <font color="forestgreen">StaticJsonBuffer<200> jsonBuffer;</font>

为JSON对象树创建内存池（在栈上分配内存）

参数
:200：内存大小(字节) -根据对象大小更改

- <font color="forestgreen">DynamicJsonBuffer  jsonBuffer;</font>

为JSON对象树创建内存池（在堆上分配内存）- 简单但效率低


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- <font color="forestgreen">JsonObject& root = jsonBuffer.createObject();</font>

创建对象树的根

- <font color="forestgreen">root["sensor"] = "gps";</font>

在对象中添加值

参数
:sensor：名称
:gps：值

- <font color="forestgreen">JsonArray& data = root.createNestedArray("data");</font>

在对象中添加一个嵌套的数组

参数
:data：数组名

- <font color="forestgreen">data.add(double_with_n_digits(48.756080, 6));</font>

给data数组添加值

参数
:48756080：值
:6：保留小数位数

- <font color="forestgreen">root.printTo(Serial);</font>

打印输出

参数
:48756080：值

例：{"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}


- <font color="forestgreen">root.prettyPrintTo(Serial);</font>

打印输出（格式）


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- <font color="forestgreen">JsonObject& root = jsonBuffer.parseObject(json);</font>

解析json数据

- <font color="forestgreen">sensor = root["sensor"]</font>

取值

- <font color="forestgreen">latitude = root["data"][0];</font>
"data":[48.756080,2.302038]
取值

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