Question

方案客户端发出GET请求，响应采用JSON格式，如此

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为了这个例子的目的，我将结果存储在一个名为＆＃34; data＆＃34;的变量中。我的正则表达式是：

     var data = {
    "enabled": true,
    "state": "schedule",
    "schedules": [
        {
        "rule": {
        "start": "2014-06-29T12:36:26.000",
        "end": "2014-06-29T12:36:56.000",
        "recurrence": [
        "RRULE:FREQ=MINUTELY"
        ]
        },
        "wifi_state_during_rule": "disabled",
        "end_state": "enabled"
        }
    ],
    "calculated_wifi_state_now": "disabled",
    "time_of_next_state_change": [
        "2014-07-08T18:56:56.000Z",
        "2014-07-08T18:57:56.000Z"
    ]
};

这里的基本思想只是为了获取除了内部和对象或数组之外的关键名...因为JSON中keyname的定义是＆＃34; keyname＆＃34;：那是＆＃39; s为什么我试图使用上面的正则表达式。

我甚至考虑过使用递归函数执行此操作但不起作用。

Answer 1

您永远不应该使用正则表达式解析非常规结构。

只需从解析的json对象中收集你想要的东西 只需运行data = JSON.parse(json_string)进行解析

function getKeysRecursive(obj) {
  var result = [];
  for (var key in obj) {
    result.push(key);
    if (typeof obj[key] == 'object') {
       result = result.concat(getKeysRecursive(obj[key]));
    }
  }
  return result;
}

getKeysRecursive(({
    "enabled": true,
    "state": "schedule",
    "schedules": [
        {
        "rule": {
        "start": "2014-06-29T12:36:26.000",
        "end": "2014-06-29T12:36:56.000",
        "recurrence": [
        "RRULE:FREQ=MINUTELY"
        ]
        },
        "wifi_state_during_rule": "disabled",
        "end_state": "enabled"
        }
    ],
    "calculated_wifi_state_now": "disabled",
    "time_of_next_state_change": [
        "2014-07-08T18:56:56.000Z",
        "2014-07-08T18:57:56.000Z"
    ]
}))

// ["enabled", "state", "schedules", "0", "rule", "start", "end", "recurrence", "0", "wifi_state_during_rule", "end_state", "calculated_wifi_state_now", "time_of_next_state_change", "0", "1"]

您可以过滤，排序，排除数字键......所有您需要的。

Answer 2

这将为您提供所有keys作为匹配项：

\"(\w+)(?:\"\:)

https://regex101.com/r/iM9wB3/2

编辑在一行中使用多个keys。

Answer 3

你不需要正则表达式。 Javascript有一个内置函数来提取Object键名。

示例：

使用Object.keys（）;

 var data = {
    "enabled": true,
    "state": "schedule",
    "schedules": [
        {
        "rule": {
        "start": "2014-06-29T12:36:26.000",
        "end": "2014-06-29T12:36:56.000",
        "recurrence": [
        "RRULE:FREQ=MINUTELY"
        ]
        },
        "wifi_state_during_rule": "disabled",
        "end_state": "enabled"
        }
    ],
    "calculated_wifi_state_now": "disabled",
    "time_of_next_state_change": [
        "2014-07-08T18:56:56.000Z",
        "2014-07-08T18:57:56.000Z"
    ]
};

，然后

console.log(Object.keys(data));

应该打印

["enabled","state","schedules","calculated_wifi_state_now","time_of_next_state_change"]

证明：http://codepen.io/theConstructor/pen/zBpWak

现在所有对象键都存储在一个数组中..

希望这有帮助

将regex表达式应用于json响应数据

3 个答案: