如何获取 Jayway 返回的数组 [String] 中 child 的路径

Question

我嵌套了 json 数据，像这样：

{
  "libraries":[
    {
      "State":"California",
      "genres":[
          {
            "genre":"thriller",
            "books":[
              {
                "title":"Book 1"
              },
              {
                "title":"Book 2"
              }
            ]
          },
          {
            "genre":"mystery",
            "books":[
              {
                "title":"Book 2"
              },
              {
                "title":"Book 3"
              }
            ]
          }
        ]
    },
    {
      "State":"New York",
      "genres":[
          {
            "genre":"horror",
            "books":[
              {
                "title":"Book 2"
              },
              {
                "title":"Book 5"
              }
            ]
          },
          {
            "genre":"comedy",
            "books":[
              {
                "title":"Book 6"
              },
              {
                "title":"Book 7"
              }
            ]
          }
        ]
    }
  ]
}

我正在使用 Scala 中的 jayway jsonpath 库来解析它。我可以使用 JsonPath.read(myData,"$.libraries[*].genres[*].books[*]") 之类的东西来获取从每个图书馆汇集的所有书籍的数组。我想要的是知道每本书的路径，例如"$.libraries(0).genres(1).books(0)"。有没有办法获取所有书籍路径的数组，而不仅仅是所有书籍？

总的来说，我是 json 路径的新手，所以如果这不是一个好问题，请原谅我。

Answer 1

您可以使用 Option.AS_PATH_LIST 的配置：

  val conf = Configuration.builder.options(Option.AS_PATH_LIST).build
  val paths = JsonPath.parse(json, conf).read[JSONArray]("$.libraries[*].genres[*].books[*]")
  for(path <- paths.toArray){
    println(path.toString)
  }

以你的例子为例 json:

$['libraries'][0]['genres'][0]['books'][0]
$['libraries'][0]['genres'][0]['books'][1]
$['libraries'][0]['genres'][1]['books'][0]
$['libraries'][0]['genres'][1]['books'][1]
$['libraries'][1]['genres'][0]['books'][0]
$['libraries'][1]['genres'][0]['books'][1]
$['libraries'][1]['genres'][1]['books'][0]
$['libraries'][1]['genres'][1]['books'][1]

如何获取 Jayway 返回的数组 [String] 中 child 的路径

How to get path for child in Array[String] returned by Jayway

java

scala

jsonpath

jsonparser

jayway