[英]How to hashmap a JSON's key-value pair where Value type and number of key-value pairs not known
I have a JSON in string format coming from DB, about which I only know that it's in key-value format. 我有一个来自数据库的字符串格式的JSON,对此我只知道它是键值格式。 I don't know beforehand
我不知道
Here are some of my JSON String: 这是我的一些JSON字符串:
{"windowHandle":"current"} \\\\ in one String: String format
{"type":"implicit","ms":100000} \\\\ in two String: String format
{"id":"{a67fc38c-10e6-4c5e-87dc-dd45134db570}"} \\\\ in one String: String format
{"key1": {"sub-key1": "sub-value1", "sub-key2": "sub-value2"}, "key2": {"sub-key2": "sub-value2"}} \\\\ in two String: Object format
So, basically: Number of key-value pair and type of value(String, Object) is not known beforehand. 因此,基本上:键值对的数量和值的类型(字符串,对象)事先未知。
I want to store this data into my Hashmap. 我想将此数据存储到我的Hashmap中。 I know that if could be only String: String format, I could do as following
put
in the Hashmap. 我知道,如果可以只字符串:字符串格式,我可以做如下
put
在HashMap中。
My question is , 我的问题是
HashMap <String, String>
? HashMap <String, String>
? Thanks in Advance ! 提前致谢 !
you can try following code. 您可以尝试以下代码。
List<Map<String, Object>> mapdataList = new ArrayList<Map<String, Object>>();
Map<String, Object> MapObj = new HashMap<String, Object>();
MapObj.put("windowHandle", "current");
MapObj.put("id", "{a67fc38c-10e6-4c5e-87dc-dd45134db570}");
mapdataList.add(MapObj);
Gson gson = new Gson();
JsonObject jObject = new JsonObject();
JsonParser jP = new JsonParser();
jObject.add("data", jP.parse(gson.toJson(mapdataList)));
System.out.println(jObject.toString());
You can use the com.fasterxml.jackson.databind.ObjectMapper
or Gson
to convert the String into a Map<String, Object>
. 您可以使用
com.fasterxml.jackson.databind.ObjectMapper
或Gson
将String转换为Map<String, Object>
。
Here is an example using Gson
这是使用
Gson
的示例
public static void main(String[] args) {
Gson gson = new GsonBuilder().setPrettyPrinting().create();
Map map = gson.fromJson("{\"var\":\"value\"}", Map.class);
System.out.println("map = " + map);
}
You can get an example of the ObjectMapper
in action over here . 您可以在此处获得运行中的
ObjectMapper
的示例。
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