从 *.txt文件更新多个 *JSON文件

Question

我有几个JSON文件，每个文件包含以下行，

"description": "Example",

我需要在每个JSON文件中使用文本文件中的一行更新此字段，例如，文本文件具有以下内容，每个文件都包含在单独的行上。

蓝色牛仔裤

红色外套

帽子

衬衫

花卉连衣裙

毛门夹克

绿带

鞋

橙色衬衫

带

我想看看是否有一个方法或脚本，每个json文件都可以通过文本文件并更新描述字段，1.JSON文件将从文本文件等返回行项目1，并完成工作直到完成，10.JSON将从 *.txt文件等订单10中更新

。 “，已更新为“描述”：“ HAT”，

任何帮助都将不胜

感激

Answer 1

一种方法是读取每个文件，解析它，然后更新您需要更新的内容，然后最终将其再次写回磁盘。
这是我的test.js脚本：

import { readFile, writeFile } from "fs/promises";

async function replaceInFiles(){
  const replacements = ["Blue Jeans", "Red Jacket", "Hat", "Shirt", "Floral Dress", "Wollen Jacket", "Green belt", "Shoes", "Orange Shirt", "Belt"]
  await Promise.all(replacements.map(async (replaceWith, idx) => {
    const filename = `${idx + 1}.json`;
    // read file
    let file;
    try {
      file = await readFile(filename);
    } catch (error) {
      console.log(`Failed to read ${filename}. ${error}`)
      return;
    }
    // parse content
    const parsed = JSON.parse(file);
    // replace description
    parsed.description = replaceWith;
    // write updated file with intendation of 4
    try {
      await writeFile(filename, JSON.stringify(parsed, null, 4));
    } catch (error) {
      console.log(`Failed to write ${filename}. ${error}`)
      return;
    }
    console.log(`Updated ${filename}.`);
  }));
  console.log("Done.")
}

(async () => {
  await replaceInFiles();
})();

我已将其测试到文件：

1.JSON

{ "description": "Example" }

2.json

{ "description": "Example2" }

然后我使用节点test.js ，此结果在以下结果：

console

Failed to read 3.json. Error: ENOENT: no such file or directory, open '3.json'
Failed to read 4.json. Error: ENOENT: no such file or directory, open '4.json'
Failed to read 5.json. Error: ENOENT: no such file or directory, open '5.json'
Failed to read 6.json. Error: ENOENT: no such file or directory, open '6.json'
Failed to read 7.json. Error: ENOENT: no such file or directory, open '7.json'
Failed to read 9.json. Error: ENOENT: no such file or directory, open '9.json'
Failed to read 8.json. Error: ENOENT: no such file or directory, open '8.json'
Failed to read 10.json. Error: ENOENT: no such file or directory, open '10.json'
Updated 1.json.
Updated 2.json.
Done.

1.JSON

{
    "description": "Blue Jeans"
}

2.JSON

{
    "description": "Red Jacket"
}

编辑

如您提到的 在评论中，您想从此处的文本文件中读取替换您需要添加到上一个代码中的内容。

replacements.txt

Blue Jeans
Red Jacket
Hat
Shirt
Floral Dress
Wollen Jacket
Green belt
Shoes
Orange Shirt
Belt

在此处填充替换的代码给定的阵列上述文件，每个元素都在新行上，如您在评论中所述：

const replacementStr = await readFile("replacements.txt", { encoding: "utf8" });
const replacements = replacementStr.split("\n");
// to make the split work for any OS no matter the line endings you can use
const replacements = replacementStr.split(/\r?\n|\r/);