如何使用 jsawk 解析 bash 中的多维 JSON 数组？

Question

我有一个如下所示的数组。我想将整个数据解析到我的 bash 数组。所以我可以从 ${bashaddr[0]} 调用第一个 "JSON addressLineOne"，等等

[
{
"id":"f0c546d5-0ce4-55ee-e043-516e0f0afdc1",
"cardType":"WMUSGESTORECARD",
"lastFour":"1682",
"cardExpiryDate":"2012-01-16",
"firstName":"robert",
"lastName":"robishaw",
"addressLineOne":"Apt venue",
"addressLineTwo":"",
"city":"oakdale",
"state":"CT",
"postalCode":"06370",
"phone":"534534",
"isDefault":false
},
{
"id":"f0c546d5-0ce0-55ee-e043-516e0f0afdc1",
"cardType":"MASTERCARD",
"lastFour":"2731",
"cardExpiryDate":"2009-08-31",
"firstName":"robert",
"lastName":"robishaw",
"addressLineOne":"119 maple ave.",
"addressLineTwo":"",
"city":"uncasville",
"state":"CT",
"postalCode":"06382",
"phone":"7676456",
"isDefault":false
},
{
"id":"f0c546d5-0ce2-55ee-e043-516e0f0afdc1",
"cardType":"MASTERCARD",
"lastFour":"6025",
"cardExpiryDate":"2011-08-31",
"firstName":"robert",
"lastName":"robishaw",
"addressLineOne":"Angeline Street",
"addressLineTwo":"",
"city":"oakdale",
"state":"CT",
"postalCode":"06370",
"phone":"7867876",
"isDefault":false
}

]

我试过这样：

#!/bin/bash
addressLineOne="$(echo $card | jsawk 'return this.addressLineOne')"

但它给了我完整的地址：

["address 1","address 2","address 3"]

谢谢。

Answer 1

我在阅读评论之前写下了下面的答案，但这与 @4ae1e1 提供的答案完全相同，除了我没有放置 -r 标签以防您希望值保持引用（例如将其作为参数传递到其他地方）。

我知道这不是 jsawk，但请考虑 jq:

jq '.[].addressLineOne' yourfile.txt

要访问特定值，您可以将记录号放在方括号中（从 0 开始作为第一个地址，依此类推）。例如获取第三条记录的地址：

jq '.[2].addressLineOne' yourfile.txt

要了解有关 jq 和高级用途的更多信息，请查看：http://jqplay.org

Answer 2

您需要做的是利用 -a 开关应用一些 post 处理并像这样过滤输出数组： jsawk 'return this.addressLineOne' -a 'return this[0]' 来自文档：

-b <script> | -a <script>
      Run the specified snippet of JavaScript before (-b) or after (-a)
      processing JSON input. The `this` object is set to the whole JSON
      array or object. This is used to preprocess (-b) or postprocess
      (-a) the JSON array before or after the main script is applied.
      This option can be specified multiple times to define multiple
      before/after scripts, which will be applied in the order they
      appeared on the command line.

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