json

json它是一种数据格式，不是一种编程语言，不是只有js才有json。

json校验网址:www.bejson.com

必须具备以下特点：

1、key添加双引号

2、末尾没有分号

3、同一对象中不允许出现两个同名属性

{
"name":"zb",
"hobby":["sing","dance"],
"work":{
              "job":"前端开发",
             "address":"wuhan"
          }
"member":[{
                  "name":"lili",
                   "hobby":["sing","dance"]
                },{
                   "name":"ben",
                   "hobby":["sing","dance"]
                     }
               ]
}

console.log(aa.hobby[1]);//dance

console.log(aa.work.job);//前端开发

console.log(aa.member[0].hobby[0]);//sing

序列化

JSON.stringify() //json对象转json字符串

JSON.parse() //json字符串转成json对象

var aa={
"name":"zb",
"hobby":["sing","dance"],
"work":{
              "job":"前端开发",
             "address":"wuhan"
          }
"member":[{
                  "name":"lili",
                   "hobby":["sing","dance"]
                },{
                   "name":"ben",
                   "hobby":["sing","dance"]
                     }
               ]
}

　把json赋值给了aa　

var test = JSON.stringify(aa,['name','member','work']);

console.log(test);//{"name":"zb","member":[{"name":"lili"},{"name":"ben"}],"work":{}}