比较Scala中的JSON相等性 [英] Compare json equality in Scala
本文介绍了比较Scala中的JSON相等性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何在scala中比较两个json结构是否相同?
How can I compare if two json structures are the same in scala?
例如,如果我有:
{
resultCount: 1,
results: [
{
artistId: 331764459,
collectionId: 780609005
}
]
}
和
{
results: [
{
collectionId: 780609005,
artistId: 331764459
}
],
resultCount: 1
}
被认为是相等的
推荐答案
您应该应该能够简单地执行 json1 = = json2
,如果json库编写正确。
You should be able to simply do json1 == json2
, if the json libraries are written correctly. Is that not working for you?
这是 spray-json ,尽管我希望每个json库都可以做到这一点:
This is with spray-json, although I would expect the same from every json library:
import spray.json._
import DefaultJsonProtocol._
Welcome to Scala version 2.10.4 (OpenJDK 64-Bit Server VM, Java 1.7.0_51).
Type in expressions to have them evaluated.
Type :help for more information.
scala> val json1 = """{ "a": 1, "b": [ { "c":2, "d":3 } ] }""".parseJson
json1: spray.json.JsValue = {"a":1,"b":[{"c":2,"d":3}]}
scala> val json2 = """{ "b": [ { "d":3, "c":2 } ], "a": 1 }""".parseJson
json2: spray.json.JsValue = {"b":[{"d":3,"c":2}],"a":1}
scala> json1 == json2
res1: Boolean = true
Spray-json使用不可变的scala Map
表示解析后的抽象语法树中的JSON对象,因此它只是 Map
的相等语义可以做到这一点。
Spray-json uses an immutable scala Map
to represent a JSON object in the abstract syntax tree resulting from a parse, so it is just Map
's equality semantics that make this work.
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