JSON与JS的区别以及转换

　　JSON是什么？(JSON和JavaScript对象有什么区别？)如何把JS对象转化为JSON字符串，又如何把JSON字符串转化为JavaScript对象？

　　JSON （JavaScript Object Notation）一种简单的数据格式，比xml更轻巧。 JSON 是 JavaScript 原生格式， 这意味着在JavaScript 中处理 JSON 数据不需要任何特殊的 API 或工具包。JSON的规则很简单： 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。

　　它是一种严格的js对象的格式，JSON的属性名必须有双引号，如果值是字符串，也必须是双引号；

可以这么说:JSON对象就是一种严格的JS对象，但是JS对象不一定是JSON对象。(JS对象的键可以带单引号，双引号或者不带引号，JSON键也必须带双引号)。

　　　　　JSON与JS转换说的是JSON字符串与JSON对象(也就是JS对象)的转换。

　　　　　JSON字符串通过eval可以转换为JSON对象(也就是一种JS对象)。

　　　　　JSON字符串将JSON对象装成字符串:     '{"width":100,"height":200,"name":"rose"}'

JSON只是一种数据格式（或者叫数据形式）;

<script>
var obj2={};//这只是JS对象
var obj3={width:100,height:200};/*这跟JSON就更不沾边了,只是JS的 对象 */
var obj4={'width':100,'height':200};/*这跟JSON就更不沾边了,只是JS的对象 */
var obj5={"width":100,"height":200,"name":"rose"}; /*我们可以把这个称做：JSON格式的JavaScript对象 */
var str1='{"width":100,"height":200,"name":"rose"}';/*我们可以把这个称做：JSON格式的字符串 */
var a=[
 {"width":100,"height":200,"name":"rose"},
 {"width":100,"height":200,"name":"rose"},
 {"width":100,"height":200,"name":"rose"},
 ];
 /*这个叫JSON格式的数组，是JSON的稍复杂一点的形式 */
var str2='['+
 '{"width":100,"height":200,"name":"rose"},'+
 '{"width":100,"height":200,"name":"rose"},'+
 '{"width":100,"height":200,"name":"rose"},'+
 ']' ;
 /* 这个叫稍复杂一点的JSON格式的字符串 */
</script>

JSON和JS对象区别对比表

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" alt="" />

　　总而言之你可以理解为JSON是JS下的一种数据格式，他从属于JS，并且在处理JSON数据时可直接使用JS内置API

JSON实例

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

JSON - 转换为 JavaScript 对象

JSON 文本格式在语法上与创建 JavaScript 对象的代码相同。

由于这种相似性，无需解析器，JavaScript 程序能够使用内建的 eval() 函数，用 JSON 数据来生成原生的 JavaScript 对象

---------------------------------JSON对象(也是一种JS对象)-----------------------------------

下面这个是JSON对象:

键必须为双引号

    var json={
                "key1":"value1",
                "address":{"name":"北京","code":205},
                "chengji":[{"name":"物理","chengji":90},{"name":"数学","chengji":100}]
                };
        alert(json.key1);//value1
        alert(json.address.code);//205
        alert(json.chengji[0].name+json.chengji[0].chengji);//物理90

注意：对象格式和数组格式可以互相嵌套

注意：json的key是字符串,且必须是双引号，不能是单引号

　　  json的value是Object

json的解析：

　　json是js的原生内容，也就意味着js可以直接取出json对象中的数据

----------------------------------------JSON语法格式的JS对象---------------------------------

键可以带单引号、双引号或不带引号

            //JSON语法的JS对象
            var p = {
                'name': '张三',
                "sex": '男',
                age: 20,
                info: function() {
                    alert("这是函数格式！");
                },
                son: {
                    name: '张三儿子'
                }
            }
            alert(p);
            p.info();
            alert(p.son.name);

例子:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>

    <head>
        <title>json01</title>
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        <meta http-equiv="description" content="this is my page">
        <meta http-equiv="content-type" content="text/html; charset=UTF-8">
        <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
    </head>

    <body>
        <ul>
            <li id="bj" name="beijing">北京</li>
        </ul>
    </body>

    <script language="JavaScript">
        //JSON格式的JS对象(可以直接取值)
        var data = {
            "name": "runoob",
            "alexa": 10000,
            "site": "www.runoob.com"
        };
        document.write(data.name + "<br/>");
        //将JSON字符串转为JS对象的方法一
        var obj = JSON.parse('{ "name":"runoob", "alexa":10000, "site":"www.runoob.com" }');
        document.write(obj.name + "<br/>");
        //将JSON字符串转为JS对象的方法二
        //JSON格式的字符串
        var test1 = '{"name":"qlq","age":25}';
        var obj2 = eval("(" + test1 + ")"); //必须带圆括号
        document.write(obj2.name + "<br/>" + obj2.age);

        //JS对象转换为JSON字符串
        var json1 = JSON.stringify(test1);
        document.write("<br/>" + json1);
    </script>

</html>

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