Question

我一直在从事一些项目，我必须处理以换行符分隔的JSON数据。这是数据的形状：

{"response": "True", "controllerId": "2751", "level": "INFO", "logType": "watchdogResponse", "deviceId": "2751", "container": "firmware", "epoch": "1549996256", "module": "hostServices", "ts": "2019-02-13 00:00:56"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "jr", "logType": "running", "controllerId": "2751", "deviceId": "2751", "rid": "EXTERNAL CALL", "val": "1549996260000"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "applicationMain", "logType": "wifi", "controllerId": "2751", "deviceId": "2751", "networkStrength": "100.0"}

现在如何解析它，我必须按其键对数据进行排序。

Answer 1

您可以使用JSON.parse()将JSON解析为javascript对象。要按字典顺序对数据进行排序，可以使用Object.entries()创建一个数组，然后使用array's sort() method对其进行排序。

let obj = JSON.parse(data)
let arr = Object.entries(obj).sort()

然后arr将是一个数组，其中包含按其键排序的键值对（作为数组）。

Answer 2

如果我理解正确，则数据不是有效的JSON字符串，而是由换行符分隔的JSON字符串。因此，这就是将data转换为具有排序键顺序的对象数组的方式：

'use strict';

const data =
`{"response": "True", "controllerId": "2751", "level": "INFO", "logType": "watchdogResponse", "deviceId": "2751", "container": "firmware", "epoch": "1549996256", "module": "hostServices", "ts": "2019-02-13 00:00:56"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "jr", "logType": "running", "controllerId": "2751", "deviceId": "2751", "rid": "EXTERNAL CALL", "val": "1549996260000"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "applicationMain", "logType": "wifi", "controllerId": "2751", "deviceId": "2751", "networkStrength": "100.0"}`;

const sortedArrayOfObjects = data
  .split('\n')
  .map(JSON.parse)
  .map(obj => Object.entries(obj).sort().reduce(
    (o, [k, v]) => (o[k] = v, o), {})
  );

console.log(sortedArrayOfObjects);

Answer 3

假设您要使用日期进行排序。

let input = `{"response": "True", "controllerId": "2751", "level": "INFO", "logType": "watchdogResponse", "deviceId": "2751", "container": "firmware", "epoch": "1549996256", "module": "hostServices", "ts": "2019-02-13 00:00:56"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "jr", "logType": "running", "controllerId": "2751", "deviceId": "2751", "rid": "EXTERNAL CALL", "val": "1549996260000"}
{"ts": "2019-02-13 00:01:10", "epoch": "1549996270", "level": "INFO", "module": "applicationMain", "logType": "wifi", "controllerId": "2751", "deviceId": "2751", "networkStrength": "100.0"}`

let out = input.split('\n').map(JSON.parse).sort((a, b) => {
  new Date(a.ts) > new Date(b.ts);
})
console.log(out);

解析由Node.js中的新行分隔的JSON数据

3 个答案: