<body>
<p>演示JSON的基本類型、語法、元素、轉換：</p>
<p id="demo"></p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var str="";
var user = {
"name":"fiction", //字符串
"age":30 , //數字
"flag":true, //布爾值
"icCard":null, //空值null
"phones": [ //數組
{ "name":"中國移動" , "number":"1234567890" },
{ "name":"中國聯通" , "number":"0987654321" },
{ "name":"中國電信" , "number":"6789054321" }
],
"friend": { //對象
"name":"胡歌",
"age":30,
"phone":"12345678765"
}
}
//獲取名字
var name = user.name;
str += "我的名字：" + name + "<br>";
//獲取年齡
var age = user["age"];
str += "我的年齡：" + age + "<br>";
//##################################
//獲取對象
var friend = user.friend;
//循環對象
for( item in friend){
str += "朋友：" + item + " is: " + friend[item] + "<br>" ;
}
//朋友 對象轉爲字符串
var friendStr = JSON.stringify(friend);
str += "朋友的信息：" + friendStr + "<br>";
//獲取朋友名字
var friendName = user.friend.name;
//獲取朋友年齡
var friendAge = user.friend["age"];
//##################################
//獲取數組
var phones = user.phones;
//循環數組
for( item in phones){ //item只是索引，不是數組裏的元素
str += "聯繫方式：" + phones[item].name + " is: "+phones[item].number + "<br>" ;
}
//數組轉字符串
var phonesStr = JSON.stringify(phones);
str += "聯繫方式字符串：" + phonesStr + "<br>";
document.getElementById("demo").innerHTML = str;
//轉JSON對象的函數解析
var textWithFunc = '{ "name":"Runoob", "alexa":"function () {return 10000;}", "site":"www.runoob.com"}';
var toJsonFunc = JSON.parse(textWithFunc);
toJsonFunc.alexa = eval("(" + toJsonFunc.alexa + ")");
document.getElementById("demo1").innerHTML = toJsonFunc.name + " Alexa 排名：" + toJsonFunc.alexa();
//轉JSON對象的日期解析
var textWithDate = '{ "name":"Runoob", "initDate":"2013-12-14", "site":"www.runoob.com"}';
var toJsonDate = JSON.parse(textWithDate, function (key, value) {
if (key == "initDate") {
return new Date(value);
} else {
return value;
}});
document.getElementById("demo2").innerHTML = toJsonDate.name + "創建日期：" + toJsonDate.initDate;
</script>
</body>
1、JSON語法
2、JSON對象
3、JSON數組
4、JSON.parse()
5、JSON.stringify()