使用R将复杂的json解析为数据帧

我无法使用R解析JIRA中的以下复杂json输出到数据框。我能够使用PowerShell将数据部分解析为数据帧。但希望在R中完成这项工作。有人可以建议如何继续？此论坛中使用Rjson或jsonlite或RJSONIO列出的解决方案不适用于此示例。使用R将复杂的json解析为数据帧

[ 
     { 
      "expand": [ 
       "operations,versionedRepresentations,editmeta,changelog,renderedFields" 
      ], 
      "id": [ 
       "22513" 
      ], 
      "self": [ 
       "https://somecompany.atlassian.net/rest/api/latest/issue/22513" 
      ], 
      "key": [ 
       "DATA-1314" 
      ], 
      "fields": { 
       "issuetype": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/issuetype/10001" 
        ], 
        "id": [ 
         "10001" 
        ], 
        "description": [ 
         "A task that needs to be done." 
        ], 
        "iconUrl": [ 
         "https://somecompany.atlassian.net/secure/viewavatar?size=xsmall&avatarId=10318&avatarType=issuetype" 
        ], 
        "name": [ 
         "Task" 
        ], 
        "subtask": [ 
         false 
        ], 
        "avatarId": [ 
         10318 
        ] 
       }, 
       "timespent": {}, 
       "project": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/project/10300" 
        ], 
        "id": [ 
         "10300" 
        ], 
        "key": [ 
         "DATA" 
        ], 
        "name": [ 
         "Data" 
        ], 
        "avatarUrls": { 
         "48x48": [ 
          "https://somecompany.atlassian.net/secure/projectavatar?avatarId=10324" 
         ], 
         "24x24": [ 
          "https://somecompany.atlassian.net/secure/projectavatar?size=small&avatarId=10324" 
         ], 
         "16x16": [ 
          "https://somecompany.atlassian.net/secure/projectavatar?size=xsmall&avatarId=10324" 
         ], 
         "32x32": [ 
          "https://somecompany.atlassian.net/secure/projectavatar?size=medium&avatarId=10324" 
         ] 
        } 
       }, 
       "fixVersions": [], 
       "aggregatetimespent": {}, 
       "resolution": {}, 
       "customfield_10500": {}, 
       "customfield_10700": {}, 
       "resolutiondate": {}, 
       "workratio": [ 
        -1 
       ], 
       "lastViewed": [ 
        "2017-07-14T15:33:40.422-0700" 
       ], 
       "watches": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/issue/DATA-1314/watchers" 
        ], 
        "watchCount": [ 
         1 
        ], 
        "isWatching": [ 
         true 
        ] 
       }, 
       "created": [ 
        "2017-07-12T11:56:12.000-0700" 
       ], 
       "customfield_10022": {}, 
       "customfield_10023": [ 
        "1|i001zz:" 
       ], 
       "priority": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/priority/3" 
        ], 
        "iconUrl": [ 
         "https://somecompany.atlassian.net/images/icons/priorities/medium.svg" 
        ], 
        "name": [ 
         "Medium" 
        ], 
        "id": [ 
         "3" 
        ] 
       }, 
       "customfield_10300": {}, 
       "labels": [ 
        [ 
         "data" 
        ] 
       ], 
       "customfield_10017": {}, 
       "customfield_10018": {}, 
       "timeestimate": {}, 
       "aggregatetimeoriginalestimate": {}, 
       "versions": [], 
       "issuelinks": [], 
       "assignee": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
        ], 
        "name": [ 
         "UserName" 
        ], 
        "key": [ 
         "UserName" 
        ], 
        "accountId": [ 
         "1234567890" 
        ], 
        "emailAddress": [ 
         "[email protected]" 
        ], 
        "avatarUrls": { 
         "48x48": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D48%26noRedirect%3Dtrue" 
         ], 
         "24x24": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D24%26noRedirect%3Dtrue" 
         ], 
         "16x16": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D16%26noRedirect%3Dtrue" 
         ], 
         "32x32": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D32%26noRedirect%3Dtrue" 
         ] 
        }, 
        "displayName": [ 
         "FName LName" 
        ], 
        "active": [ 
         true 
        ], 
        "timeZone": [ 
         "America/Los_Angeles" 
        ] 
       }, 
       "updated": [ 
        "2017-07-12T13:07:51.000-0700" 
       ], 
       "status": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/status/1" 
        ], 
        "description": [ 
         "The issue is open and ready for the assignee to start work on it." 
        ], 
        "iconUrl": [ 
         "https://somecompany.atlassian.net/images/icons/statuses/open.png" 
        ], 
        "name": [ 
         "Open" 
        ], 
        "id": [ 
         "1" 
        ], 
        "statusCategory": { 
         "self": [ 
          "https://somecompany.atlassian.net/rest/api/2/statuscategory/2" 
         ], 
         "id": [ 
          2 
         ], 
         "key": [ 
          "new" 
         ], 
         "colorName": [ 
          "blue-gray" 
         ], 
         "name": [ 
          "To Do" 
         ] 
        } 
       }, 
       "components": [], 
       "timeoriginalestimate": {}, 
       "description": {}, 
       "customfield_10010": {}, 
       "customfield_10011": {}, 
       "customfield_10012": {}, 
       "customfield_10013": {}, 
       "customfield_10014": {}, 
       "customfield_10015": {}, 
       "customfield_10401": [ 
        "FName" 
       ], 
       "customfield_10600": {}, 
       "customfield_10402": [ 
        "TESTING DATA DOWNLOAD USING API" 
       ], 
       "customfield_10006": {}, 
       "customfield_10403": [ 
        { 
         "self": [ 
          "https://somecompany.atlassian.net/rest/api/2/customFieldOption/10100" 
         ], 
         "value": [ 
          "i_file" 
         ], 
         "id": [ 
          "10100" 
         ] 
        } 
       ], 
       "customfield_10007": {}, 
       "customfield_10800": {}, 
       "customfield_10008": {}, 
       "aggregatetimeestimate": {}, 
       "customfield_10009": {}, 
       "summary": [ 
        "testing" 
       ], 
       "creator": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
        ], 
        "name": [ 
         "UserName" 
        ], 
        "key": [ 
         "UserName" 
        ], 
        "accountId": [ 
         "1234567890" 
        ], 
        "emailAddress": [ 
         "[email protected]" 
        ], 
        "avatarUrls": { 
         "48x48": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D48%26noRedirect%3Dtrue" 
         ], 
         "24x24": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D24%26noRedirect%3Dtrue" 
         ], 
         "16x16": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D16%26noRedirect%3Dtrue" 
         ], 
         "32x32": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D32%26noRedirect%3Dtrue" 
         ] 
        }, 
        "displayName": [ 
         "FName LName" 
        ], 
        "active": [ 
         true 
        ], 
        "timeZone": [ 
         "America/Los_Angeles" 
        ] 
       }, 
       "subtasks": [], 
       "reporter": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
        ], 
        "name": [ 
         "UserName" 
        ], 
        "key": [ 
         "UserName" 
        ], 
        "accountId": [ 
         "1234567890" 
        ], 
        "emailAddress": [ 
         "[email protected]" 
        ], 
        "avatarUrls": { 
         "48x48": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D48%26noRedirect%3Dtrue" 
         ], 
         "24x24": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D24%26noRedirect%3Dtrue" 
         ], 
         "16x16": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D16%26noRedirect%3Dtrue" 
         ], 
         "32x32": [ 
          "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%12345678901215406a6830d189deda8cc%3Fd%3Dmm%26s%3D32%26noRedirect%3Dtrue" 
         ] 
        }, 
        "displayName": [ 
         "FName LName" 
        ], 
        "active": [ 
         true 
        ], 
        "timeZone": [ 
         "America/Los_Angeles" 
        ] 
       }, 
       "aggregateprogress": { 
        "progress": [ 
         0 
        ], 
        "total": [ 
         0 
        ] 
       }, 
       "customfield_10000": {}, 
       "customfield_10001": {}, 
       "customfield_10002": {}, 
       "customfield_10004": [ 
        "{}" 
       ], 
       "customfield_10400": [ 
        "DA-000000" 
       ], 
       "environment": {}, 
       "duedate": [ 
        "2017-07-13" 
       ], 
       "progress": { 
        "progress": [ 
         0 
        ], 
        "total": [ 
         0 
        ] 
       }, 
       "votes": { 
        "self": [ 
         "https://somecompany.atlassian.net/rest/api/2/issue/DATA-1314/votes" 
        ], 
        "votes": [ 
         0 
        ], 
        "hasVoted": [ 
         false 
        ] 
       } 
      } 
     } 
    ]

来源

2017-07-17 RanonKahn

查看包'jsonlite'？ – CPak

这看起来不很矩形。你想要什么样的决赛桌？ – MrFlick

这是我经常要做的事情。对我来说，我通常将json保存为R中的一个列表，然后根据我想要的数据框的外观创建一个数据框。这里是一些代码来说明：

library(tidyverse) 
jira <- fromJSON(.....) #this is whatever code you used to get the data from JIRA in R 
df <- data_frame(id = jira$id, fielddescription=jira$fields$description)

基本上你使用你创建构建自己的数据帧的jira对象中的元素。有时您需要使用多个$才能访问嵌套的项目，如上图所示jira$fields$description

您可能还想探索tidyjson包。它意味着这样的问题。我发现构建我自己的数据框比较简单，如图所示，但对于某些用例或编程风格，可能更适合您的口味和情况。

来源

2017-07-17 20:51:00 simitpatel

非常有用的答案。 – RanonKahn

当你使用JSON时，你能帮我解释如何验证JIRA访问吗？ – RanonKahn

总结这一切在一组''，并将其分配给一个变量json。然后，

library(jsonlite) 
l <- fromJSON(json, simplifyDataFrame = FALSE) 
str(l)

正如其他人所说，这不会轻易地解析为一个data.frame，但在这里它是一个列表。

List of 1 
$ :List of 5 
    ..$ expand: chr "operations,versionedRepresentations,editmeta,changelog,renderedFields" 
    ..$ id : chr "22513" 
    ..$ self : chr "https://somecompany.atlassian.net/rest/api/latest/issue/22513" 
    ..$ key : chr "DATA-1314" 
    ..$ fields:List of 60 
    .. ..$ issuetype     :List of 7 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/issuetype/10001" 
    .. .. ..$ id   : chr "10001" 
    .. .. ..$ description: chr "A task that needs to be done." 
    .. .. ..$ iconUrl : chr "https://somecompany.atlassian.net/secure/viewavatar?size=xsmall&avatarId=10318&avatarType=issuetype" 
    .. .. ..$ name  : chr "Task" 
    .. .. ..$ subtask : logi FALSE 
    .. .. ..$ avatarId : int 10318 
    .. ..$ timespent     : Named list() 
    .. ..$ project      :List of 5 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/project/10300" 
    .. .. ..$ id  : chr "10300" 
    .. .. ..$ key  : chr "DATA" 
    .. .. ..$ name  : chr "Data" 
    .. .. ..$ avatarUrls:List of 4 
    .. .. .. ..$ 48x48: chr "https://somecompany.atlassian.net/secure/projectavatar?avatarId=10324" 
    .. .. .. ..$ 24x24: chr "https://somecompany.atlassian.net/secure/projectavatar?size=small&avatarId=10324" 
    .. .. .. ..$ 16x16: chr "https://somecompany.atlassian.net/secure/projectavatar?size=xsmall&avatarId=10324" 
    .. .. .. ..$ 32x32: chr "https://somecompany.atlassian.net/secure/projectavatar?size=medium&avatarId=10324" 
    .. ..$ fixVersions     : list() 
    .. ..$ aggregatetimespent   : Named list() 
    .. ..$ resolution     : Named list() 
    .. ..$ customfield_10500   : Named list() 
    .. ..$ customfield_10700   : Named list() 
    .. ..$ resolutiondate    : Named list() 
    .. ..$ workratio     : int -1 
    .. ..$ lastViewed     : chr "2017-07-14T15:33:40.422-0700" 
    .. ..$ watches      :List of 3 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/issue/DATA-1314/watchers" 
    .. .. ..$ watchCount: int 1 
    .. .. ..$ isWatching: logi TRUE 
    .. ..$ created      : chr "2017-07-12T11:56:12.000-0700" 
    .. ..$ customfield_10022   : Named list() 
    .. ..$ customfield_10023   : chr "1|i001zz:" 
    .. ..$ priority      :List of 4 
    .. .. ..$ self : chr "https://somecompany.atlassian.net/rest/api/2/priority/3" 
    .. .. ..$ iconUrl: chr "https://somecompany.atlassian.net/images/icons/priorities/medium.svg" 
    .. .. ..$ name : chr "Medium" 
    .. .. ..$ id  : chr "3" 
    .. ..$ customfield_10300   : Named list() 
    .. ..$ labels      : chr [1, 1] "data" 
    .. ..$ customfield_10017   : Named list() 
    .. ..$ customfield_10018   : Named list() 
    .. ..$ timeestimate     : Named list() 
    .. ..$ aggregatetimeoriginalestimate: Named list() 
    .. ..$ versions      : list() 
    .. ..$ issuelinks     : list() 
    .. ..$ assignee      :List of 9 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
    .. .. ..$ name  : chr "UserName" 
    .. .. ..$ key   : chr "UserName" 
    .. .. ..$ accountId : chr "1234567890" 
    .. .. ..$ emailAddress: chr "[email protected]" 
    .. .. ..$ avatarUrls :List of 4 
    .. .. .. ..$ 48x48: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 24x24: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 16x16: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 32x32: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. ..$ displayName : chr "FName LName" 
    .. .. ..$ active  : logi TRUE 
    .. .. ..$ timeZone : chr "America/Los_Angeles" 
    .. ..$ updated      : chr "2017-07-12T13:07:51.000-0700" 
    .. ..$ status      :List of 6 
    .. .. ..$ self   : chr "https://somecompany.atlassian.net/rest/api/2/status/1" 
    .. .. ..$ description : chr "The issue is open and ready for the assignee to start work on it." 
    .. .. ..$ iconUrl  : chr "https://somecompany.atlassian.net/images/icons/statuses/open.png" 
    .. .. ..$ name   : chr "Open" 
    .. .. ..$ id   : chr "1" 
    .. .. ..$ statusCategory:List of 5 
    .. .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/statuscategory/2" 
    .. .. .. ..$ id  : int 2 
    .. .. .. ..$ key  : chr "new" 
    .. .. .. ..$ colorName: chr "blue-gray" 
    .. .. .. ..$ name  : chr "To Do" 
    .. ..$ components     : list() 
    .. ..$ timeoriginalestimate   : Named list() 
    .. ..$ description     : Named list() 
    .. ..$ customfield_10010   : Named list() 
    .. ..$ customfield_10011   : Named list() 
    .. ..$ customfield_10012   : Named list() 
    .. ..$ customfield_10013   : Named list() 
    .. ..$ customfield_10014   : Named list() 
    .. ..$ customfield_10015   : Named list() 
    .. ..$ customfield_10401   : chr "FName" 
    .. ..$ customfield_10600   : Named list() 
    .. ..$ customfield_10402   : chr "TESTING DATA DOWNLOAD USING API" 
    .. ..$ customfield_10006   : Named list() 
    .. ..$ customfield_10403   :List of 1 
    .. .. ..$ :List of 3 
    .. .. .. ..$ self : chr "https://somecompany.atlassian.net/rest/api/2/customFieldOption/10100" 
    .. .. .. ..$ value: chr "i_file" 
    .. .. .. ..$ id : chr "10100" 
    .. ..$ customfield_10007   : Named list() 
    .. ..$ customfield_10800   : Named list() 
    .. ..$ customfield_10008   : Named list() 
    .. ..$ aggregatetimeestimate  : Named list() 
    .. ..$ customfield_10009   : Named list() 
    .. ..$ summary      : chr "testing" 
    .. ..$ creator      :List of 9 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
    .. .. ..$ name  : chr "UserName" 
    .. .. ..$ key   : chr "UserName" 
    .. .. ..$ accountId : chr "1234567890" 
    .. .. ..$ emailAddress: chr "[email protected]" 
    .. .. ..$ avatarUrls :List of 4 
    .. .. .. ..$ 48x48: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 24x24: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 16x16: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 32x32: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. ..$ displayName : chr "FName LName" 
    .. .. ..$ active  : logi TRUE 
    .. .. ..$ timeZone : chr "America/Los_Angeles" 
    .. ..$ subtasks      : list() 
    .. ..$ reporter      :List of 9 
    .. .. ..$ self  : chr "https://somecompany.atlassian.net/rest/api/2/user?username=UserName" 
    .. .. ..$ name  : chr "UserName" 
    .. .. ..$ key   : chr "UserName" 
    .. .. ..$ accountId : chr "1234567890" 
    .. .. ..$ emailAddress: chr "[email protected]" 
    .. .. ..$ avatarUrls :List of 4 
    .. .. .. ..$ 48x48: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=48&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 24x24: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=24&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 16x16: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=16&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. .. ..$ 32x32: chr "https://avatar-cdn.atlassian.com/12345678901206a6830d189deda8cc?s=32&d=https%3A%2F%2Fsecure.gravatar.com%2Favatar%1234567890121"| __truncated__ 
    .. .. ..$ displayName : chr "FName LName" 
    .. .. ..$ active  : logi TRUE 
    .. .. ..$ timeZone : chr "America/Los_Angeles" 
    .. ..$ aggregateprogress   :List of 2 
    .. .. ..$ progress: int 0 
    .. .. ..$ total : int 0 
    .. ..$ customfield_10000   : Named list() 
    .. ..$ customfield_10001   : Named list() 
    .. ..$ customfield_10002   : Named list() 
    .. ..$ customfield_10004   : chr "{}" 
    .. ..$ customfield_10400   : chr "DA-000000" 
    .. ..$ environment     : Named list() 
    .. ..$ duedate      : chr "2017-07-13" 
    .. ..$ progress      :List of 2 
    .. .. ..$ progress: int 0 
    .. .. ..$ total : int 0 
    .. ..$ votes      :List of 3 
    .. .. ..$ self : chr "https://somecompany.atlassian.net/rest/api/2/issue/DATA-1314/votes" 
    .. .. ..$ votes : int 0 
    .. .. ..$ hasVoted: logi FALSE

来源

2017-07-17 20:48:13

该列表是我正在处理json输出。我无法超越此。 – RanonKahn

使用R将复杂的json解析为数据帧

回答

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