JAVA json对象如何取值 java如何从json中取值

public static void main(String[] args) {
String jsonStr = "{‘head‘:{‘version‘:‘1‘},‘dataList‘:{‘resCode‘:‘ss‘,‘list‘:[{‘name‘:‘file1‘,‘type‘:‘0‘},{‘name‘:‘file2‘,‘type‘:‘1‘}]}}";
JSONObject  dataJson=JSONObject.fromObject(jsonStr);
JSONObject  dataList=dataJson.getJSONObject("dataList");
JSONArray list=dataList.getJSONArray("list");
JSONObject info=list.getJSONObject(1);
String name=info.getString("name");
String type=info.getString("type");
System.out.println(name+type);        //String name = jsonObject.getString("name");        //System.out.println(name);
}