解析json

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

Object

String nana="{'username':'a','password':'123'}";
        JSONObject jsonObject = JSONObject.fromObject(nana);
        String name = jsonObject.getString("username");
        System.out.println(name);

Array

String details="[{'username':'a','password':'123'},{'username':'b','password':'321'}]";

        JSONArray array = JSONArray.fromObject(details);
        Object[] obj = new Object[array.size()];
        for(int i = 0; i < array.size(); i++){
            Object object=array.getJSONObject(i).get("username");
            System.out.println(object);
        }