08JSON格式 

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6     <title>Document</title>
 7 
 8     <script>
 9         /*
10             JSON格式的语法
11                 var personStr = '{"属性名":"属性值", "属性名":属性值, "属性名":{}, "属性名":["","",""], "属性名":[{},{},{}], ...:...}'
12                 属性名必须用""，属性值如果是字符串，必须用""，数字可以不处理
13         */
14 
15         //一个JSON格式的字符串
16         var personStr = '{"name":"张三", "age":20, "dog":{"dname":"小花", "dage":2}, "loveSingers":["张小明","王小东","李小红"], "friends":[{"fname":"李四"},{"fname":"王五"},{"fname":"赵六"}]}'
17         console.log(personStr)
18        
19         //通过JSON.parse()可以将一个JSON串转换为一个对象
20         var person = JSON.parse(personStr)
21         console.log(person)
22         console.log(person.name)
23         console.log(person.dog.dname)
24         console.log(person.loveSingers[0])
25         console.log(person.friends[0].fname)
26 
27         //通过 JSON.stringify() 将一个对象转换为JSON串
28         var personStr1 = JSON.stringify(person)
29         console.log(personStr1)
30 
31     </script>
32 
33 </head>
34 <body>
35     
36 </body>
37 </html>

 

posted @ 2024-03-14 22:32  白茶花约  阅读(15)  评论(0)    收藏  举报