Question

我有一个嵌套的json，我想用cavascript在csv中转换并下载它。

以下是json的详细信息：

{
  "table_1" : [
    {
      "a": "apple",
      "b": "ball"
    },
    {
      "a": "alpha",
      "b": "beta"
    }
    ],
    "table_2" : [
      {
        "m" : "mango",
        "n" : 1,
        "o" : "orange"
      },
      {
        "m" : "melon",
        "n" : 2,
        "o" : "olive"
      },
      {
        "m" : "mulberry",
        "n" : 3,
        "o" : "onion"
      }
      ]
}

所需的CSV就是这样的：

现在，请让我知道，我怎么能做到这一点是JS。 我特意在一个csv文件中查找多个表格输出。很快就会出现。

***请注意，

2表的结构不同

1st ong有2列命名a，b

＆安培;

第二个3列命名m，n，o

提前致谢!!

Answer 1

第一级的简单迭代循环和内部的另一个迭代循环，如果内部循环的第一次迭代 - 添加列名称。

Answer 2

您可以使用npm模块https://www.npmjs.com/package/json2csv

$ npm install json2csv --save

var json2csv = require('json2csv');
var fields = ['field1', 'field2', 'field3'];

try {
  var result = json2csv({ data: myData, fields: fields });
  console.log(result);
} catch (err) {
  // Errors are thrown for bad options, or if the data is empty and no fields are provided.
  // Be sure to provide fields if it is possible that your data array will be empty.
  console.error(err);
}

Answer 3

最后，我这样做了：

<强>码

    var data = {
            "table_1" : [
              {
                "a": "apple",
                "b": "ball"
              },
              {
                "a": "alpha",
                "b": "beta"
              }
              ],
              "table_2" : [
                {
                  "m" : "mango",
                  "n" : 1,
                  "o" : "orange"
                },
                {
                  "m" : "melon",
                  "n" : 2,
                  "o" : "olive"
                },
                {
                  "m" : "mulberry",
                  "n" : 3,
                  "o" : "onion"
                }
                ]
          };

    var csvData = [""];
    csvData.push(["+++++++++++++++++++++++"]);
    csvData.push(["SAMPLE REPORT"]);
    csvData.push(["+++++++++++++++++++++++"]);
    csvData.push([""]);
    csvData.push(["TABLE 1"]);
    csvData.push(["========="]);
    csvData.push(["a","b"]);
    data.table_1.forEach(function(record){
      csvData.push(record);
    });
    csvData.push(["----------------------------------------------------------"]);
    csvData.push([""]);
    csvData.push(["TABLE 2"]);
    csvData.push(["========="]);
    csvData.push(["m","n","o"]);
    data.table_2.forEach(function(record){
      csvData.push(record);
    });

    util.JSONToCSVConvertor(util.copy(csvData), "Sample Report", true);

<强>输出：

如果有任何其他优化方式，请告诉我。

JavaScript：将嵌套的json转换为csv

3 个答案: