前端JSON使用总结

JSON: JavaScript Object Notation(JavaScript 对象表示法)的简称。

1. 什么是 JSON ？

JSON 指的是 JavaScript 对象表示法（JavaScript Object Notation）。

JSON 是轻量级的文本数据交换格式,是存储和交换文本信息的语法。类似 XML,但比 XML 更小、更快，更易解析。

JSON 使用 Javascript语法来描述数据对象，但是 JSON 仍然独立于语言和平台。

JSON 具有自我描述性，更易理解。

JSON 实例如下:

{

"employees": [

{ "firstName":"John" , "lastName":"Doe" },

{ "firstName":"Anna" , "lastName":"Smith" },

{ "firstName":"Peter" , "lastName":"Jones" }

]

}

这个 employee 对象是包含 3 个员工记录（对象）的数组。

2. JSON语法规则

JSON 语法是 JavaScript 对象表示法语法的子集。

(1). 数据在名称/值对中

JSON 数据的书写格式是：名称/值对。

名称/值对包括字段名称（在双引号中），后面写一个冒号，然后是值：

"firstName" : "John"

等价于下面的JavaScript 语句：

firstName = "John"。

JSON 值可以是：数字（整数或浮点数）, 字符串（在双引号中）, 逻辑值（true 或 false）, 数组（在方括号中）, 对象（在花括号中）, null。

(2). 数据由逗号分隔

(3). 花括号保存对象

JSON 对象在花括号中书写, 对象可以包含多个名称/值对：

{ "firstName":"John" , "lastName":"Doe" }

与下面的JavaScript 语句等价：

firstName = "John"

lastName = "Doe"

(4) 方括号保存数组

JSON 数组在方括号中书写,数组可包含多个对象：

{

"employees": [

{ "firstName":"John" , "lastName":"Doe" },

{ "firstName":"Anna" , "lastName":"Smith" },

{ "firstName":"Peter" , "lastName":"Jones" }

]

}

在上面的例子中，对象 "employees" 是包含三个对象的数组。每个对象代表一条关于某人（有姓和名）的记录。

3. JSON 文件

JSON 文件的文件类型是 ".json"结尾的文件。

JSON 文本的 MIME 类型是 "application/json"。

4. JSON 使用 JavaScript 语法。

因为 JSON 使用 JavaScript 语法，所以无需额外的软件就能处理 JavaScript 中的 JSON。

通过 JavaScript，您可以创建一个对象数组，并像这样进行赋值：

var employees = [

{ "firstName":"John" , "lastName":"Doe" },

{ "firstName":"Anna" , "lastName":"Smith" },

{ "firstName":"Peter" , "lastName": "Jones" }

];

可以像这样访问 JavaScript 对象数组中的第一项：

employees[0].lastName;

返回的内容是：

Doe

可以像这样修改数据：

employees[0].firstName = "Jonatan";

5. 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，JavaScript程序无需解析器就能够使用内建的 eval() 函数用 JSON 数据生成原生的 JavaScript 对象。

6. JSON与与 XML的异同

与 XML 相同之处:

(1). JSON 是纯文本

(2).JSON 具有"自我描述性"（人类可读）

(3). JSON 具有层级结构（值中存在值）

(4). JSON 可通过 JavaScript 进行解析

(5). JSON 数据可使用 AJAX 进行传输

与 XML 不同之处:

　 (1). 没有结束标签

(2). 更短

(3).读写的速度更快

(4).能够使用内建的 JavaScript eval() 方法进行解析

(5).使用数组

　 (6).不使用保留字

故而，对于 AJAX 应用程序来说，JSON 比 XML 更快更易使用：

使用 XML的解析步骤:

读取 XML 文档

使用 XML DOM 来循环遍历文档

读取值并存储在变量中

使用 JSON

读取 JSON 字符串

　用 eval() 处理 JSON 字符串

7. JSON 使用案例

7.1 把 JSON 文本转换为 JavaScript 对象

JSON 最常见的用法之一，是从 web 服务器上读取 JSON 数据（作为文件或作为 HttpRequest），将 JSON 数据转换为 JavaScript 对象，然后在网页中使用该数据。

为了简单讲解，我们使用字符串作为输入进行演示（而不是文件）。

创建包含 JSON 语法的 JavaScript 字符串：

var txt = '{ "employees" : [' +

'{ "firstName":"John" , "lastName":"Doe" },' +

'{ "firstName":"Anna" , "lastName":"Smith" },' +

'{ "firstName":"Peter" , "lastName":"Jones" } ]}';

由于 JSON 语法是 JavaScript 语法的子集，JavaScript 函数 eval() 可用于将 JSON 文本转换为 JavaScript 对象。

eval() 函数使用的是 JavaScript 编译器，可解析 JSON 文本，然后生成 JavaScript 对象。必须把文本包围在括号中，这样才能避免语法错误：

var obj = eval ("(" + txt + ")");

在网页中使用 JavaScript 对象：

<p>

First Name: <span id="fname"></span><br />

Last Name: <span id="lname"></span><br />

</p>

<script>

document.getElementById("fname").innerHTML = obj.employees[1].firstName

document.getElementById("lname").innerHTML = obj.employees[1].lastName

</script>

完整案例如下:

<!DOCTYPE html>

<html>

<body>

<h2>Create Object from JSON String</h2>

<p>

First Name: <span id="fname"></span><br>

Last Name: <span id="lname"></span><br>

</p>

<script>

var txt = '{"employees":[' +

'{"firstName":"John","lastName":"Doe" },' +

'{"firstName":"Anna","lastName":"Smith" },' +

'{"firstName":"Peter","lastName":"Jones" }]}';

var obj = eval ("(" + txt + ")");

document.getElementById("fname").innerHTML=obj.employees[1].firstName

document.getElementById("lname").innerHTML=obj.employees[1].lastName

</script>

</body>

</html>

效果如下所示：

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" alt="" />

7.2 JSON 解析器

eval() 函数可编译并执行任何 JavaScript 代码。这隐藏了一个潜在的安全问题。使用 JSON 解析器将 JSON 转换为 JavaScript 对象是更安全的做法。JSON 解析器只能识别 JSON 文本，而不会编译脚本。在浏览器中，这提供了原生的 JSON 支持，而且 JSON 解析器的速度更快。较新的浏览器和最新的 ECMAScript (JavaScript) 标准中均包含了原生的对 JSON 的支持。

Web 浏览器支持	Web 软件支持
Firefox (Mozilla) 3.5 Internet Explorer 8 Chrome Opera 10 Safari 4	jQuery Yahoo UI Prototype Dojo ECMAScript 1.5

对于较老的浏览器，可使用 JavaScript 库： https://github.com/douglascrockford/JSON-js。

完整案例如下：

<!DOCTYPE html>

<html>

<body>

<h2>Create Object from JSON String</h2>

<p>

First Name: <span id="fname"></span><br>

Last Name: <span id="lname"></span><br>

</p>

<script>

var txt = '{"employees":[' +

'{"firstName":"John","lastName":"Doe" },' +

'{"firstName":"Anna","lastName":"Smith" },' +

'{"firstName":"Peter","lastName":"Jones" }]}';

obj = JSON.parse(txt);

document.getElementById("fname").innerHTML=obj.employees[1].firstName

document.getElementById("lname").innerHTML=obj.employees[1].lastName

</script>

</body>

</html>

效果如下所示：

aaarticlea/png;base64,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" alt="" />

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前端JSON使用总结

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