JavaScript中字符串解析到对象转换
假设下面的html源代码是一个字符串，我将如何解析它以提取JavaScript中字符串解析到对象转换,javascript,Javascript,假设下面的html源代码是一个字符串，我将如何解析它以提取var dataObject，并将其作为具有属性的对象返回给用户 <!doctype html> <!--[if IE 7]><html class="no-js lt-ie10 lt-ie9 lt-ie8"><![endif]--> <!--[if IE 8]><html class="no-js lt-ie10 lt-ie9"><![endif]-->
var dataObject<!doctype html>
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Air Retro 15 Obsidian - Footpatrol | Footpatrol</title>
<meta name="description" content="" />
<meta name="keywords" content="" />
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, maximum-scale=1.0, target-densityDpi=device-dpi" />
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="Footpatrol - TEAM FP">
<meta name="format-detection" content="telephone=no">
<link rel="shortcut icon" href="/templates/footpatrol.co.uk/_assets/icons/favicon.ico" type="image/x-icon" />
<link rel="apple-touch-icon" sizes="57x57" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-57x57.png">
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<link rel="apple-touch-icon" sizes="57x57" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-57x57-precomposed.png">
<link rel="apple-touch-icon" sizes="60x60" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-60x60-precomposed.png">
<link rel="apple-touch-icon" sizes="72x72" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-72x72-precomposed.png">
<link rel="apple-touch-icon" sizes="76x76" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-76x76-precomposed.png">
<link rel="apple-touch-icon" sizes="114x114" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-114x114-precomposed.png">
<link rel="apple-touch-icon" sizes="120x120" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-120x120-precomposed.png">
<link rel="apple-touch-icon" sizes="144x144" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-144x144-precomposed.png">
<link rel="apple-touch-icon" sizes="152x152" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-152x152-precomposed.png">
<link rel="apple-touch-icon" sizes="180x180" href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-icon-180x180-precomposed.png">
<link rel="icon" sizes="192x192" href="/templates/footpatrol.co.uk/_assets/icons/touch-icon-192x192.png">
<link rel="icon" type="image/png" href="/templates/footpatrol.co.uk/_assets/icons/favicon-16x16.png" sizes="16x16">
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<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-1496x2048.png" media="(device-width: 768px) and (device-height: 1024px) and (-webkit-device-pixel-ratio: 2) and (orientation: landscape)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-768x1004.png" media="(device-width: 768px) and (device-height: 1024px) and (-webkit-device-pixel-ratio: 1) and (orientation: portrait)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-748x1024.png" media="(device-width: 768px) and (device-height: 1024px) and (-webkit-device-pixel-ratio: 1) and (orientation: landscape)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-1242x2148.png" media="(device-width: 414px) and (device-height: 736px) and (-webkit-device-pixel-ratio: 3) and (orientation: portrait)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-1182x2208.png" media="(device-width: 414px) and (device-height: 736px) and (-webkit-device-pixel-ratio: 3) and (orientation: landscape)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-750x1294.png" media="(device-width: 375px) and (device-height: 667px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-640x1096.png" media="(device-width: 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-640x920.png" media="(device-width: 320px) and (device-height: 480px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<link href="/templates/footpatrol.co.uk/_assets/icons/apple-touch-startup-image-320x460.png" media="(device-width: 320px) and (device-height: 480px) and (-webkit-device-pixel-ratio: 1)" rel="apple-touch-startup-image">
<meta name="google-site-verification" content="zzI3fd6H_JByuEoUy-mwtsEdSARxSXpjoSDKWLFOAYA" />
<meta property="og:title" content="Air Retro 15 Obsidian" />
<meta property="og:type" content="product" />
<meta property="og:url" content="http://www.footpatrol.co.uk/footwear/282524-air-retro-15-obsidian.html" />
<meta property="og:image" content="http://www.footpatrol.co.uk/images/ac_product_images/product_image_data/resizeandpad:324:488/http://i1.adis.ws/i/jpl/fp_282524_a.jpg" />
<meta property="og:site_name" content="Footpatrol" />
<meta property="fb:admins" content="501344983" />
<!-- !CSS -->
<link href="/templates/footpatrol.co.uk/_css/swiper.css?v=47" rel="stylesheet" type="text/css" />
<link href="/templates/footpatrol.co.uk/_css/master.css?v=47" rel="stylesheet" type="text/css" />
<link href="/templates/footpatrol.co.uk/_css/fp.main.css?v=47" rel="stylesheet" type="text/css" />
<link href="/templates/footpatrol.co.uk/_css/fp.mobile.css?v=47" rel="stylesheet" type="text/css" />
<link href="/templates/footpatrol.co.uk/_css/fp.tablet.css?v=47" rel="stylesheet" type="text/css" />
<link href="/templates/footpatrol.co.uk/_css/fp.master.overrides.css?v=47" rel="stylesheet" type="text/css" />
<link href="http://fonts.googleapis.com/css?family=Lato:300,400,700" rel="stylesheet" type="text/css">
<!-- !JS -->
<script type="text/javascript">
var dataObject = {
brand: 'Jordan',
currency: 'GBP',
category: 'Footwear',
platform: 'desktop',
pageType: 'product',
pageName: 'Air Retro 15 Obsidian - Footpatrol',
custId: '',
plu: '282524',
description: 'Air Retro 15 Obsidian',
unitPrice: '160',
sale: 'false'
};
</script>
您可以按照以下示例中的操作进行：
var givenString = "<script>var dataObject={firstname: 'rahul'}</script>"
var doc = new DOMParser().parseFromString(givenString, 'text/html');
var scriptContent = doc.getElementsByTagName('script');
var dataObject = [].map.call(scriptContent, function(item) {
return item.textContent;
});
//try this code to get the real object
var a = dataObject[0];
a += ';return dataObject;'; //dataObject is the name of the variable that contains what I want to return
var f = new Function(a);
console.log(f);
var object = f();
console.log(object); //will give you the object
var givenString=“var dataObject={firstname:'rahul'}”
var doc=new DOMParser（）.parseFromString（givenString，'text/html'）；
var scriptContent=doc.getElementsByTagName（'script'）；
var dataObject=[].map.call（脚本内容、函数（项）{
返回item.textContent；
});
//尝试此代码以获取真实对象
var a=数据对象[0]；
a+='；返回数据对象；'//dataObject是包含我要返回的内容的变量的名称
var f=新函数（a）；
控制台日志（f）；
var object=f（）；
console.log（对象）//我会给你这个东西
var parser=new DOMParser（），htmlDoc=parser.parseFromString（html，“text/html”）。。。然后在htmlDoc
Hi-Rahul上使用DOM技术，返回var-dataObject={}作为字符串如何将其映射到对象，以便访问以下属性：dataObject[0]。name
等。检查我的更新答案。做了一点小改动以获取对象的值。基本上，我将该字符串作为javascript代码执行，方法是用它生成一个函数并返回对象的值。本可以使用eval
，但速度慢且不安全。注意：名称对象
已硬编码，您可以在您的案例中处理。它不能按预期工作，请检查一下好吗？不确定var a=dataString[0]发生了什么以及jslint在var f=new Function（a）处抛出错误“函数构造函数是eval的一种形式”。在var a=dataObject[0]处成功检索数据对象（必须进行更改），但在尝试将其映射到对象时似乎存在问题。要映射的数据对象的示例如下：var dataObject={品牌：'Jordan'，货币：'GBP'，类别：'Shoots'，平台：'desktop'，页面类型：'product'，页面名称：'Air Retro 15 Obsidian-Footatrol'，custId:'plu:'282524'，描述：'Air Retro 15 Obsidian'，单价：'160'，销售：'false'；
var givenString = "<script>var dataObject={firstname: 'rahul'}</script>"
var doc = new DOMParser().parseFromString(givenString, 'text/html');
var scriptContent = doc.getElementsByTagName('script');
var dataObject = [].map.call(scriptContent, function(item) {
return item.textContent;
});
//try this code to get the real object
var a = dataObject[0];
a += ';return dataObject;'; //dataObject is the name of the variable that contains what I want to return
var f = new Function(a);
console.log(f);
var object = f();
console.log(object); //will give you the object