net.sf.json java在json数据中获取元素

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import java.util.Iterator;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class testOk {


    public static void main(String[] args) {

        String a = "{\"agreementAreas\":[{\"citys\":[{\"city\":\"441900\",\"cityName\":\"东莞市\"}],\"province\":\"440000\",\"provinceName\":\"广东省\"}],\"code\":\"0\"}";
        JSONObject da = JSONObject.fromObject(a);
        Iterator iterator = da.keys();
        String key = null;
        String value = null;
        while (iterator.hasNext()) {
            key = (String) iterator.next();
            // System.out.println(key);
            if (key.equals("agreementAreas")) {

                JSONArray jsonArray = JSONArray.fromObject(da
                        .get("agreementAreas"));
                JSONObject jsonObj = jsonArray.getJSONObject(0);
                System.out.println(jsonObj);
                StringBuilder sb = new StringBuilder();
                Iterator bv = jsonObj.keys();
                String keys = null;
                String values = null;
                while (bv.hasNext()) {
                    keys = (String) bv.next();
                    System.out.println(keys);
                    if (keys.equals("province")) {
                        value = jsonObj.getString(keys);
                        sb.append(value);

                        System.out.println(value);
                    }
                    if (keys.equals("provinceName")) {
                        values = jsonObj.getString(keys);
                        System.out.println(values);
                        sb.append(values);
                    }
                    System.out.println("StringBuilder:" + sb);
                    String as = jsonObj.getString("province");
                    String b = jsonObj.getString("provinceName");
                    JSONArray jsonArrayX = jsonObj.getJSONArray("citys");

                }
            }
        }
    }
}

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