您可以递归遍历JsonObject以获取所有键。
继承人伪代码

You can recursively traverse your JsonObject to get all keys. heres the pseudocode

findKeys(JsonObject obj,List keys){
List<String>keysFromObj=obj.keys();
keys.addAll(keysFromObj);
for(String key:keysFromObj){
    if(obj.get(key).getClass()==JSONObject.class){
         findKeys(obj.get(key),keys);
         }
    }
}

假设您的对象是{a：1，b：{c：你好，d：4.0}}
上面的函数应该给你[a，b，c， d]

So suppose if your object is {"a":1,"b":{"c":"hello","d":4.0}} the above function should give you ["a","b","c","d"]

但是如果你只想要[a，c，d]作为输出，你可以写 -

But if you want only ["a","c","d"] as your output,you can write-

findKeys(JsonObject obj,List keys){
List<String>keysFromObj=obj.keys();

for(String key:keysFromObj){
    if(obj.get(key).getClass()==JSONObject.class){
         findKeys(obj.get(key),keys);
         }else{
         keys.add(key);
         }
    }
}