json使用类型总结:使用javascript语法

2021-01-1708:26:19WEB前端开发Comments1,776 views字数 1190阅读模式

一、json值:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

1、JSON 值可以是:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(1)数字(整数或浮点数)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(2)字符串(在双引号中)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(3)逻辑值(true 或 false)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(4)数组(在中括号中)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(5)对象(在大括号中)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(6)null文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

2、举例:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

(1)json数字:JSON 数字可以是整型或者浮点型:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{ "age":30 }

(2)json对象:JSON 对象在大括号({})中书写,对象可以包含多个名称/值对:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{ "name":"菜鸟教程" , "url":"www.runoob.com" }

(3)json数组:JSON 数组在中括号中书写,数组可包含多个对象:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{
"sites": [
{ "name":"菜鸟教程" , "url":"www.runoob.com" }, 
{ "name":"google" , "url":"www.google.com" }, 
{ "name":"微博" , "url":"www.weibo.com" }
]
}

(4)json布尔值:JSON 布尔值可以是 true 或者 false:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{ "flag":true }

(5)json null:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{ "runoob":null }

二、json使用javascript语法:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

var sites = [
    { "name":"runoob" , "url":"www.runoob.com" }, 
    { "name":"google" , "url":"www.google.com" }, 
    { "name":"微博" , "url":"www.weibo.com" }
];

三、json对象:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

1、json对象语法:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

myObj = { "name":"runoob", "alexa":10000, "site":null };

2、嵌套json对象:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

myObj = {
    "name":"runoob",
    "alexa":10000,
    "sites": {
        "site1":"www.runoob.com",
        "site2":"m.runoob.com",
        "site3":"c.runoob.com"
    }
}

四、json数组:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

1、json数组语法:JSON 数组在中括号中书写文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

[ "Google", "Runoob", "Taobao" ]

2、json对象中的数组:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

{
"name":"网站",
"num":3,
"sites":[ "Google", "Runoob", "Taobao" ]
}

3、嵌套json对象中的数组:JSON 对象中数组可以包含另外一个数组,或者另外一个 JSON 对象文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

myObj = {
    "name":"网站",
    "num":3,
    "sites": [
        { "name":"Google", "info":[ "android", "Google 搜索", "Google 翻译" ] },
        { "name":"Runoob", "info":[ "菜鸟教程", "菜鸟工具", "菜鸟微信" ] },
        { "name":"Taobao", "info":[ "淘宝", "网购" ] }
    ]
}

参考来源:菜鸟教程文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

以上就是json使用类型总结的全部内容。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/gcs/20849.html

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