在javascript中从内部有多个数组的JSON数组中获取特定值

Question

我在这里问，因为我可以看到这个网站，在这方面我有一个JASON格式的输出值，如下所示：

{
  "total": 16,
  "members": [{
        "id": 4,
        "name": "Blade11",
        "descriptors": {
          "os": "Windows 2012 / WS2012 R2"
        },
        "FCPaths": [{
          "wwn": "50060B0000C27208",
          "hostSpeed": 0
        }, {
          "wwn": "50060B0000C2720A",
          "hostSpeed": 0
        }],
        "iSCSIPaths": [],
        "persona": 11,
        "links": [{
          "href": "https://3par:8080/api/v1/hostpersonas?query=\"wsapiAssignedId EQ 11\"",
          "rel": "personaInfo"
        }],
        "initiatorChapEnabled": false,
        "targetChapEnabled": false
      }, {
        "id": 6,
        "name": "Blade4",
        "descriptors": {
          "os": "VMware (ESXi)"
        },
        "FCPaths": [{
          "wwn": "50060B0000C27216",
          "hostSpeed": 0
        }, {
          "wwn": "50060B0000C27214",
          "hostSpeed": 0
        }],
        "iSCSIPaths": [],
        "persona": 8,
        "links": [{
          "href": "https://3par:8080/api/v1/hostpersonas?query=\"wsapiAssignedId EQ 8\"",
          "rel": "personaInfo"
        }],
        "initiatorChapEnabled": false,
        "targetChapEnabled": false
      }

我想要的是，解析此输出，以便仅在字符串列表或字符串数组中检索名称对象的输出参数，例如Names = Blade11，Blade4，...

如果您可以在Json输出中看到，我们将所有名称都放在"members“下，那么每个名称都是另一个值数组，我只想检索名称

谢谢

Answer 1

因为已经有了JSON格式，所以可以在JSON对象的成员键上使用数组方法来迭代每个数组项。

   var names = []; 
   object_name.members.forEach((arrItem) => { 
     names.push(arrItem.name);
   }

或

  namesArray = object_name.members.map((arrItem) => {
    return arrItem.name;
  }

Answer 2

您可以使用Array#map来迭代数组的所有元素，并且只返回name属性。

如果您有一个JSON字符串，则需要提前对其进行解析以获取对象，例如

object = JSON.parse(jsonString);

​

var jsonString = '{"total":16,"members":[{"id":4,"name":"Blade11","descriptors":{"os":"Windows 2012 / WS2012 R2"},"FCPaths":[{"wwn":"50060B0000C27208","hostSpeed":0},{"wwn":"50060B0000C2720A","hostSpeed":0}],"iSCSIPaths":[],"persona":11,"links":[{"href":"https://3par:8080/api/v1/hostpersonas?query=\\"wsapiAssignedId EQ 11\\"","rel":"personaInfo"}],"initiatorChapEnabled":false,"targetChapEnabled":false},{"id":6,"name":"Blade4","descriptors":{"os":"VMware (ESXi)"},"FCPaths":[{"wwn":"50060B0000C27216","hostSpeed":0},{"wwn":"50060B0000C27214","hostSpeed":0}],"iSCSIPaths":[],"persona":8,"links":[{"href":"https://3par:8080/api/v1/hostpersonas?query=\\"wsapiAssignedId EQ 8\\"","rel":"personaInfo"}],"initiatorChapEnabled":false,"targetChapEnabled":false}]}',
    object = JSON.parse(jsonString),
    array = object.members.map(function (a) { return a.name; });

console.log(array);

​

Answer 3

如果此JSON是字符串，则必须先对其进行解析

var json = JSON.parse('here is your JSON string');

然后，您就可以像使用对象一样访问它的属性

var names = json.members.map(function(member) {
    return member.name;
});