[JSON]初识JSON

1:什么是json

json是,是储存和交换文本信息的语法,类似于xml,但是比xml更小,更快,更易解析.

2:JSON的语法规则

JSON中:数据在key/velue对中,数据由对号分隔,花括号{}保存对象,方括号保存数组[]

"key":"velue"

3:JSON的值

可以是数字,字符串,逻辑值,数组,对象或null

4:JSON对象

{"name":"冲出地球","from":"china" }

{"id":"1","name":"小明","age":"15"}

{"id":"15"}

5:JSON数组

["早上","中午","下午","晚上"]

[["蚌埠","0552","皖C"],["合肥","0551","皖A"],["滁州","0550","皖M"]]

6:JSON对象数组和数组对象

一个是对象中含有数组,一个是数组中含有对象

{

    "cityname":"蚌埠",

    "countyname":["怀远","五河","固镇"]

}

[

    {

        "cityname":"合肥",

        "countyname":["肥东","肥西","长丰","庐江"]

    },

    {

        "cityname":"蚌埠",

        "countyname":["怀远","五河","固镇"]

    }

]

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[JSON]初识JSON

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