将 ArrayList<Map<String， String>> 转换为 jsonArray

Question

我需要将我的ArrayList<Map<String, String>>对象转换为JSONArray

ArrayList<Map<String, String>> dataList = new ArrayList<Map<String, String>>();
//I tried this
JSONArray jsonArray = new JSONArray(dataList);  
// I am importing (java-json.jar) for converting ArrayList to JSONArray
// But i can't put this array in to JqGrid in my jsp page it's does not give me any output

Answer 1

您可以尝试谷歌的Gson库，它可以轻松地将Java对象转换为Json，反之亦然

试试下面的代码

Gson gson = new Gson();
JsonArray jsonArray = gson.toJsonTree(dataList).getAsJsonArray();

编辑:将jsonArray转换为字符串

String jsonStr = gson.toJson(jsonArray); //This will convert JsonArray to Java string