如何比较两个json文件的差异并获得更改后的属性的唯一ID

Question

我想比较Json文件的两个版本（从git检索）是否有任何差异，并显示被更改的元素的唯一ID。 示例Json： 以下是我的示例Json的版本1：

 {
  "menu": {
    "obj1": {
      "id": "2",
      "value": "File",
      "popup": {
        "menuitem": [
          {
            "value": "New",
            "onclick": "CreateNewDoc()"
          }
        ]
      }
    },
   "obj2": {
      "id": "1",
      "value": "File",
      "popup": {
        "menuitem": [
          {
            "value": "New",
            "onclick": "CreateNewDoc()"
          }
        ]
      }
    }
  }
}

示例Json的版本2：

   {
  "menu": {
    "obj1": {
      "id": "2",
      "value": "File",
      "popup": {
        "menuitem": [
          {
            "value": "New",
            "onclick": "CreateNewDoc()"
          }
        ]
      }
    },
   "obj2": {
      "id": "1",
      "value": "File",
      "popup": {
        "menuitem": [
          {
            "value": "Existing",
            "onclick": "Open()"
          }
        ]
      }
    }
  }
}

“ id”是我的唯一标识符，并且我尝试了以下代码来查找差异

          JSONParser parser = new JSONParser(new FileReader("D:/FromRepo/new.txt"));
          Object obj = parser.parse();

          JSONParser parser1 = new JSONParser(new FileReader("D:/FromRepo/new1.txt"));
          Object obj1 = parser1.parse();


          Gson g = new Gson();
          Type mapType = new TypeToken<Map<String, Object>>(){}.getType();
          Map<String, Object> firstMap = g.fromJson( obj.toString(), mapType);
          Map<String, Object> secondMap = g.fromJson(  obj1.toString(), mapType);
        //  System.out.println(Maps.difference(firstMap, secondMap).    entriesDiffering());


          Map<String, Object> leftFlatMap = FlatMapUtil.flatten(firstMap);
          Map<String, Object> rightFlatMap = FlatMapUtil.flatten(secondMap);

          MapDifference<String, Object> difference = Maps.difference(leftFlatMap, rightFlatMap);

          System.out.println("\n\nEntries differing\n--------------------------");
          difference.entriesDiffering()
                    .forEach((key, value) -> System.out.println(key + ": " + value));

它给了我以下输出

Entries differing
--------------------------
/menu/obj2/popup/menuitem/0/value: (New, Existing)
/menu/obj2/popup/menuitem/0/onclick: (CreateNewDoc(), Open())

但是有什么方法可以获取更改后的元素的id，在这种情况下为“ id”：“ 1”