Question

任何建议如何从此JSON文件提取结果以Powershell下面提到的结果
JSON文件
{ "meta": { "effective_params": { "data_set": "Website", "base_currencies": [ "USD" ] }, "endpoint": "spot", "request_time": "2018-06-20T18:06:59+00:00", "skipped_currency_pairs": []，“引号”：[ { "base_currency": "USD", "quote_currency": "AUD", "bid": "1.35494", "ask": "1.35516", "midpoint": "1.35505" }, { "base_currency": "USD", "quote_currency": "BRL", "bid": "3.75455", "ask": "3.75705", "midpoint": "3.75580" ] }

我尝试获取此结果：
request_time :2018-06-20T18:06:59+00:00
base_currency : USD
quote_currency : ZAR
bid : 13.6187
ask : 13.6276
midpoint : 13.6232

Answer 1

首先，您的JSON对象无效。您在第二个中点之后缺少}。

$json = Get-content -raw -path C:\path\to\file.json 
$obj = ConvertFrom-Json -InputObject $json

##get all quote info
$obj.quotes 

##get one set
write-host request_time: $obj.meta.request_time
write-host base_currency: $obj.quotes[0].base_currency
write-host quote_currency: $obj.quotes[0].quote_currency
write-host bid: $obj.quotes[0].bid
write-host ask: $obj.quotes[0].ask
write-host midpoint: $obj.quotes[0].ask

##loop through

$rTime = $obj.meta.request_time;

ForEach($i in $obj.quotes){
write-host request_time: $rTime
write-host base_currency: $i.base_currency
write-host quote_currency: $i.quote_currency
write-host bid: $i.bid
write-host ask: $i.ask
write-host midpoint: $i.ask
""
}

Answer 2

这应该可以解决问题：

$json = @"
  {
  "meta": {
    "effective_params": {
      "data_set": "Website",
      "base_currencies": [
        "USD"
      ]
    },
    "endpoint": "spot",
    "request_time": "2018-06-20T18:06:59+00:00",
    "skipped_currency_pairs": []
},
"quotes":[
   {
      "base_currency": "USD",
      "quote_currency": "AUD",
      "bid": "1.35494",
      "ask": "1.35516",
      "midpoint": "1.35505"
    },
    {
      "base_currency": "USD",
      "quote_currency": "BRL",
      "bid": "3.75455",
      "ask": "3.75705",
      "midpoint": "3.75580"
  }
  ]
}
"@

$obj = $json | ConvertFrom-Json

$result = foreach( $quote in $obj.quotes ) {

    "request_time :      $($obj.meta.request_time)"
    "base_currency :     $($quote.base_currency)"
    "quote_currency :    $($quote.quote_currency)"
    "bid :               $($quote.bid)"
    "ask :               $($quote.ask)"
    "midpoint :          $($quote.midpoint)"
} 

$result

Answer 3

假设这是来自其他一些检索JSON对象的PowerShell代码，并且（再次）假设您只是尝试在屏幕上显示JSON，这真的很简单。

包装用于检索JSON结果的代码，通过管道传递到ConvertFrom-Json，然后访问quotes成员集合。

例如：

(('<code that returns a JSON object>') | ConvertFrom-Json).quotes

更现实一点...

((Invoke-WebRequest -Uri "HTTPS://Website.domain/API?param=value").Content | ConvertFrom-Json).quotes

或者如果您简单地想在PowerShell中导入原始JSON并以本地PowerShell格式查看报价对象：

((Get-content -Path C:\path\to\file.json) | ConvertFrom-Json).quotes

或者存储JSON对象并在以后使用：

$JSON = (Get-content -Path C:\path\to\file.json) | ConvertFrom-Json
$JSON.quotes

json在powershell中扩展

3 个答案: