用Axios抓取后如何将对象推送到JSON文件？

分类：编程问答

如何解决用Axios抓取后如何将对象推送到JSON文件？

因此，我设法从URL获得了我想要的一切。现在，我想将该对象写入“ verified.json”文件中。问题在于，只有我对象中的最后一项被写入那里，而另一项却被写入，表明它显然在某个地方坏了。

我是这个菜鸟，所以对解决方案的解释将不胜感激。

const axios = require("axios");
const cheerio = require("cheerio");
const fs = require('fs');
const colors = require("colors");
prodArray = {};

axios.get("https://arstechnica.com/gadgets/").then(urlResponse => {
  const $ = cheerio.load(urlResponse.data);

  $('li.article').each((i,elem) => {

    const link = $(elem).find("a.overlay").attr("href");
    //console.log(link.cyan);
    
    const header = $(elem).find("h2").text();
    //console.log(header);

    const author = $(elem).find("p.byline").find("a").text();
    //console.log(author);
    console.log("---------------\n".red);

    data = {
      "Link: ": link,"Title: ": header,"Author: ": author
    }

    let dataStringfy = JSON.stringify(data);

    let test = fs.writeFile("verified.json",dataStringfy,function (err) {
      if (err) {
        console.log(err)
      } else {
        console.log("Success")
      }
    })
    console.log(test);
  })
})

解决方法

您可以在写入文件之前先插入数组

var datas = [];

$('li.article').each((i,elem) => {

    const link = $(elem).find("a.overlay").attr("href");
    //console.log(link.cyan);
    
    const header = $(elem).find("h2").text();
    //console.log(header);

    const author = $(elem).find("p.byline").find("a").text();
    //console.log(author);
    console.log("---------------\n".red);

    data = {
      "Link: ": link,"Title: ": header,"Author: ": author
    }

    datas.push(data);

});

let dataStringfy = JSON.stringify(datas);

let test = fs.writeFile("verified.json",dataStringfy,function (err) {
      if (err) {
        console.log(err)
      } else {
        console.log("Success")
      }
    })
,

我认为这样效果更好

const arr = []
$('li.article').each((i,elem) => {
  const link = $(elem).find("a.overlay").attr("href");
  const header = $(elem).find("h2").text();
  const author = $(elem).find("p.byline").find("a").text();
  arr.push({
    "Link": link,"Title": header,"Author": author
  })
})
let dataStringfy = JSON.stringify(arr);
console.log(dataStringfy)


const $doc = $($("xmp").text());
const arr = []
$('li.article',$doc).each((i,"Author": author
  })
})
let dataStringfy = JSON.stringify(arr);
console.log(dataStringfy)
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
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