json的几种标准格式
目录
- 1、简介
- 2、JSON的标准格式
-
- 2.1 JSON数值
- 2.2 JSON字符串
- 2.3 JSON数组
- 2.4 JSON对象
- 2.5 JSON对象数组
- 2.6 JSON数组对象
1、简介
什么是 JSON ？
- JSON 指的是 JavaScript 对象表示法（JavaScript Object Notation）
- JSON 是轻量级的文本数据交换格式
- JSON 独立于语言
- JSON 具有自我描述性，更易理解
- JSON 使用 JavaScript 语法来描述数据对象，但是 JSON 仍然独立于语言和平台。JSON 解析器和 JSON 库支持许多不同的编程语言。
w3c的标准说明如下：
JSON(JavaScript Object Notation) 是一种轻量级的数据交换格式。 易于人阅读和编写。同时也易于机器解析和生成。 它基于JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999的一个子集。 JSON采用完全独立于语言的文本格式，但是也使用了类似于C语言家族的习惯（包括C, C++, C#, Java, JavaScript, Perl, Python等）。 这些特性使JSON成为理想的数据交换语言。
2、JSON的标准格式
JSON具有以下这些形式：
对象是一个无序的“‘名称/值’对”集合。一个对象以“{”（左括号）开始，“}”（右括号）结束。每个“名称”后跟一个“:”（冒号）；“‘名称/值’ 对”之间使用“,”（逗号）分隔。
2.1 JSON数值
- 格式：{ “key” : value}
- 示例： {“key1”:100,“key2”:20}
{
"key1":100,
"key2":20
}
2.2 JSON字符串
- 格式：{ “key” : “value”}
- 示例： {“key1” : “张三”,“key2” : “大忽悠”}
{
"key1" : "张三",
"key2" : "大忽悠"
}
2.3 JSON数组
- 格式：{ “key” : [value]}
- 示例：{key" : [000, 111111],“key1” : [18874, 15157]}
{
"key" : [000, 111111],
"key1" : [18874, 15157]
}
2.4 JSON对象
- 格式：{ “key” : {value}}
- 示例： {“key” : {“1”: “亚索”},“key1” : {“2”: “刘备”}}
{
"key" : {"1": "亚索"},
"key1" : {"2": "刘备"}
}
2.5 JSON对象数组
- 格式：{ “key” : [{“key1”: “value1”},{“key2”: “value2”}]}
- 示例：{“我”:[{“key”: “好好学习”},{“key1”:“天天向上”}]}
{
"我" : [
{"key": "好好学习"},
{"key1": "天天向上"}
]
}
2.6 JSON数组对象
- 格式：{“key”:{“key1”:[value1,value2]}}
- 示例：{“我”:{“你” : [18874,15157]}}
{
"我" : {
"你" : [18874,15157]
}
}
综合运用示例：
{"cm":{"ln":"-55.0","sv":"V2.9.6","os":"8.0.4","g":"[email protected]","mid":"489","nw":"3G","l":"es","vc":"4","hw":"640*960","ar":"MX","uid":"489","t":"1593123253541","la":"5.2","md":"sumsung-18","vn":"1.3.4","ba":"Sumsung","sr":"I"},"ap":"app","et":[{"ett":"1593050051366","en":"loading","kv":{"extend2":"","loading_time":"14","action":"3","extend1":"","type":"2","type1":"201","loading_way":"1"}},{"ett":"1593108791764","en":"ad","kv":{"activityId":"1","displayMills":"78522","entry":"1","action":"1","contentType":"0"}},{"ett":"1593111271266","en":"notification","kv":{"ap_time":"1593097087883","action":"1","type":"1","content":""}},{"ett":"1593066033562","en":"active_background","kv":{"active_source":"3"}},{"ett":"1593135644347","en":"comment","kv":{"p_comment_id":1,"addtime":"1593097573725","praise_count":973,"other_id":5,"comment_id":9,"reply_count":40,"userid":7,"content":"辑赤蹲慰鸽抿肘捎"}}],"id":"1593136280858"}
看着不方便，用解析器解析一下：
{
"cm":{
"ln":"-55.0",
"sv":"V2.9.6",
"os":"8.0.4",
"g":"[email protected]",
"mid":"489",
"nw":"3G",
"l":"es",
"vc":"4",
"hw":"640*960",
"ar":"MX",
"uid":"489",
"t":"1593123253541",
"la":"5.2",
"md":"sumsung-18",
"vn":"1.3.4",
"ba":"Sumsung",
"sr":"I"
},
"ap":"app",
"et":[
{
"ett":"1593050051366",
"en":"loading",
"kv":{
"extend2":"",
"loading_time":"14",
"action":"3",
"extend1":"",
"type":"2",
"type1":"201",
"loading_way":"1"
}
},
{
"ett":"1593108791764",
"en":"ad",
"kv":{
"activityId":"1",
"displayMills":"78522",
"entry":"1",
"action":"1",
"contentType":"0"
}
},
{
"ett":"1593111271266",
"en":"notification",
"kv":{
"ap_time":"1593097087883",
"action":"1",
"type":"1",
"content":""
}
},
{
"ett":"1593066033562",
"en":"active_background",
"kv":{
"active_source":"3"
}
},
{
"ett":"1593135644347",
"en":"comment",
"kv":{
"p_comment_id":1,
"addtime":"1593097573725",
"praise_count":973,
"other_id":5,
"comment_id":9,
"reply_count":40,
"userid":7,
"content":"辑赤蹲慰鸽抿肘捎"
}
}
],
"id":"1593136280858"
}