JSONParser无法解析为类型

JSONParser类在本教程的下方，它看起来像这样……

public class JSonParser {    static InputStream is = null;    static JSonObject jObj = null;    static String json = "";    // constructor    public JSonParser() {    }    // function get json from url    // by making HTTP POST or GET method    public JSonObject makeHttpRequest(String url, String method, List<NamevaluePair> params) {        // Making HTTP request        try { // check for request method if(method == "POST"){     // request method is POST     // defaultHttpClient     DefaultHttpClient httpClient = new DefaultHttpClient();     HttpPost httpPost = new HttpPost(url);     httpPost.setEntity(new UrlEnpredFormEntity(params));     HttpResponse httpResponse = httpClient.execute(httpPost);     HttpEntity httpEntity = httpResponse.getEntity();     is = httpEntity.getContent(); }else if(method == "GET"){     // request method is GET     DefaultHttpClient httpClient = new DefaultHttpClient();     String paramString = URLEnpredUtils.format(params, "utf-8");     url += "?" + paramString;     HttpGet httpGet = new HttpGet(url);     HttpResponse httpResponse = httpClient.execute(httpGet);     HttpEntity httpEntity = httpResponse.getEntity();     is = httpEntity.getContent(); }        } catch (UnsupportedEncodingException e) { e.printStackTrace();        } catch (ClientProtocolException e) { e.printStackTrace();        } catch (IOException e) { e.printStackTrace();        }        try { BufferedReader reader = new BufferedReader(new InputStreamReader(         is, "iso-8859-1"), 8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) {     sb.append(line + "n"); } is.close(); json = sb.toString();        } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString());        }        // try parse the string to a JSON object        try { jObj = new JSonObject(json);        } catch (JSonException e) { Log.e("JSON Parser", "Error parsing data " + e.toString());        }        // return JSON String        return jObj;    }}

我会考虑看看杰克逊图书馆通过http://jackson.prehaus.org/