我是Node.js的新手。我的要求是，我需要解析JSON并将数据导出到包含JSON中所有字段的Excel文件中。
我的JSON如下：
{
"id": 1255,
"title": "The Brain and Nervous System (LS1.D)",
"description": "By the time you finish this playlist, you should be able to: 1. Describe how the nervous system is organized and how it works 2. Describe the role of the nervous sytem, and explain how our different senses work to send information to your brain",
"keyTerms": "You should also be able to define the following words: stimulus, response, neuron, sensory neuron, motor neuron, nerve impulse, dendrite, axon, nerve, central nervous system, peripheral nervous system, brain, spinal cord, cerebrum, cerebellum, brain stem, retina, cochlea",
"visible": true,
"introduction": {
"id": 5336,
"title": "Introductory Materials",
"resources": [
{
"id": 23022,
"title": "Vocabulary - Brain and Nervous System",
"description": "",
"purpose": "",
"category": "Website",
"position": 1,
"contentItem": {
"id": 1650,
"url": "http://quizlet.com/45497180/flashcards",
"itemType": "Website",
"embedUrl": null
}
},
{
"id": 23023,
"title": "The Brain and Nervous System Study Guide",
"description": "Fill out this study guide while studying! It will help you prepare for the assessment!",
"purpose": "",
"category": "Website",
"position": 2,
"contentItem": {
"id": 12581,
"url": "https://docs.google.com/a/summitps.org/document/d/1TjF1MY3cyGNKT4s46uk1iz5NvjrY59eNPH8YKYYTC_E/edit",
"itemType": "Website",
"embedUrl": null
}
}
]
},
"objectives": [
{
"id": 10732,
"title": "1. Describe how the nervous system is organized",
"caContribution": 5,
"position": 1,
"resources": [
{
"id": 23024,
"title": "Reading - How the Nervous System Works",
"description": "",
"purpose": "",
"category": "Document",
"position": 1,
"contentItem": {
"id": 1651,
"url": null,
"itemType": "Document",
"embedUrl": "https://view-api.box.com/1/sessions/493fca96d46a4559813c3118ebeef8b6/view?theme=light",
"s3Url": "/files/content_items/relateds/000/001/651/original/53d1ddd8f07787731aa7d84f-how_20nervous_20system_20works_001.pdf?1424368501"
}
}
]
},
{
"id": 10734,
"title": "2. Describe the role of the nervous sytem, and explain how our different senses work to send information to your brain",
"caContribution": 5,
"position": 2,
"resources": [
{
"id": 23039,
"title": "Study Jams - The Senses",
"description": "This series of videos explains the different senses: sight, hearing, taste, touch, and smell",
"purpose": "",
"category": "Website",
"position": 1,
"contentItem": {
"id": 1666,
"url": "http://studyjams.scholastic.com/studyjams/jams/science/human-body/touching.htm",
"itemType": "Website",
"embedUrl": null
}
},
{
"id": 23040,
"title": "Nervous System: I'm Sensing Something",
"description": "Format: Article Content: How does the nervous system work and interact with other systems",
"purpose": "",
"category": "Website",
"position": 1,
"contentItem": {
"id": 12582,
"url": "http://www.biology4kids.com/files/systems_nervous.html",
"itemType": "Website",
"embedUrl": null
}
}
]
}
]
}
我使用了 json2xls 模块，我得到了电子表格，其中包含字段id，title，description，keyTerms，visible，简介，目标，其中介绍和目标来自 [object] [object ]，[对象] [对象]
以下是导出到excel文件的代码：
var fs = require("fs");
var json2xls = require("json2xls");
fs.readFile('/home/e100093/nodejs/sampleJson.json','utf8',function(err,body){
var jsonData = JSON.parse(body);
var xls = json2xls(jsonData);
fs.writeFileSync('final-test.xlsx', xls, 'binary');
});
但我想要输出字段，如id，title，description，keyTerms，visible，introduction.id，introduction.title，introduction.resources.id，introduction.resources.title，...，objectives.id，goals。 title，objectives.description，.....等。
我需要动态地解析对象和数组，并在电子表格的每一列中生成字段。
包含列和数据的示例输出如下：
id title description keyTerms visible introduction.id introduction.title introduction.resources.id introduction.resources.title introduction.resources.description introduction.resources.purpose introduction.resources.category introduction.resources.position introduction.resources.contentItem.id introduction.resources.contentItem.url introduction.resources.contentItem.itemType introduction.resources.contentItem.embedUrl objectives.id objectives.title objectives.caContribution objectives.position objectives.resources.id objectives.resources.title objectives.resources.description objectives.resources.purpose objectives.resources.category objectives.resources.position objectives.resources.contentItem.id objectives.resources.contentItem.url objectives.resources.contentItem.itemType objectives.resources.contentItem.embedUrl objectives.resources.contentItem.s3Url
1255 The Brain and Nervous System (LS1.D) By the time you finish... You should also... true 5336 Introductory Materials 23022 Vocabulary - Brain and Nervous System null null Website 1 1650 http://quizlet.com/... Website null null null null null null null null null null null null null null null null
1255 The Brain and Nervous System (LS1.D) By the time you finish... You should also... true 5336 Introductory Materials 23023 The Brain and Nervous System Study Guide Fill out this... null Website 2 12581 https://docs.google.com/... Website null null null null null null null null null null null null null null null null
1255 The Brain and Nervous System (LS1.D) By the time you finish... You should also... true null null null null null null null null null null null null 10732 1. Describe how... 5 1 23024 Reading - How... null null Document 1 1651 null Document https://view-api.box.com/1... /files/content...
1255 The Brain and Nervous System (LS1.D) By the time you finish... You should also... true null null null null null null null null null null null null 10734 2. Describe the role... 5 2 23039 Study Jams - The Senses This series of videos null Website 1 1666 http://studyjams.scholastic.com... Website null
1255 The Brain and Nervous System (LS1.D) By the time you finish... You should also... true null null null null null null null null null null null null 10734 2. Describe the role... 5 2 23040 Nervous System: I'm Sensing... Format: Article Content... null Website 1 12582 http://www.biology4kids.com... Website null
请帮我解决这个问题。
答案 0 :(得分：6)
您可以使用AlaSQL javascript库和特殊的SEARCH运算符来执行此操作，该运算符旨在搜索嵌套对象。请参阅下面的代码，它会生成包含您的结构的Excel文件（我没有包含所有字段）：
var alasql = require('alasql');
var data = [{
"id": 1255,
"title": "The Brain and Nervous System (LS1.D)",
// ...
},
{
"id": 1256,
// ...
}];
// Here is search query
alasql('SEARCH / AS @a \
UNION ALL( \
introduction AS @b \
resources / AS @c \
RETURN(@a->id AS id, @a->title AS title, @a->description AS description, \
@a->keyTerms AS keyTerms, @a->visible AS visible, \
@b->id as [introduction.id], @b->title as [introduction.title], \
@c->id AS [introduction.resources.id], \
@c->contentItem->id AS [introduction.resources.contentItem.id] \
) \
, \
objectives AS @b \
resources / AS @c \
RETURN(@a->id AS id, @a->title AS title, @a->description AS description, \
@a->keyTerms AS keyTerms, @a->visible AS visible, \
@b->id as [objectives.id], @b->title as [objectives.title], \
@c->id AS [objectives.resources.id], \
@c->contentItem->id AS [objectives.resources.contentItem.id] \
) \
) INTO XLSX("test411.xlsx",{headers:true})\
FROM ?',[data]);
一些解释：
您还需要添加其他列才能完成此查询。样本文件将在两小时内上传here。
您也可以从源代码中删除此行：INTO XLSX()，alasql()将返回包含所有属性的JSON对象：
var res = alasql('SEARCH / AS @a UNION ALL(...) FROM ?',[data]);
console.log(res);
答案 1 :(得分：0)
您正在使用json2xls模块，该模块接受对象或数组，但嵌套的级别对象结构。我的意思是，如果引言和目标是标量属性，那么你的定义会很好。即。
{
"id": 1255,
"title": "...)",
"description": "...",
"keyTerms": "...",
"visible": true,
"introduction": "string/int/float/bool/date",
"objectives": "string/int/float/bool/date"
}
或
[
{
"id": 1255,
"title": "...)",
"description": "...",
"keyTerms": "...",
"visible": true,
"introduction": "string/int/float/bool/date",
"objectives": "string/int/float/bool/date"
},
{
"id": 1256,
"title": "...)",
"description": "...",
"keyTerms": "...",
"visible": true,
"introduction": "string/int/float/bool/date",
"objectives": "string/int/float/bool/date"
}
]
但在你的情况下，介绍是一个具有嵌套元素的对象，而目标是一个对象数组，它们都被解释为[object] [object]
我不知道您在excel文件中想要什么，但您需要先决定如何展平结构。