MySQL和PHP，JSON錯誤<BR

Question

我收到此錯誤並不能似乎找到了答案。我在Google上發現的所有內容都指向了我的php，但似乎沒有任何解決方法。 JsonParser類適用於我的註冊和登錄頁面。

的錯誤是

Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be 
converted to JSONArray 

JSON分析器

類

public class JSONParser { 

    static InputStream is = null; 
    static JSONObject jObj = null; 
    static String json = ""; 

    // constructor 
    public JSONParser() { 

    } 


    public JSONObject getJSONFromUrl(final String url) { 

     // Making HTTP request 
     try { 
      // Construct the client and the HTTP request. 
      DefaultHttpClient httpClient = new DefaultHttpClient(); 
      HttpPost httpPost = new HttpPost(url); 

      // Execute the POST request and store the response locally. 
      HttpResponse httpResponse = httpClient.execute(httpPost); 
      // Extract data from the response. 
      HttpEntity httpEntity = httpResponse.getEntity(); 
      // Open an inputStream with the data content. 
      is = httpEntity.getContent(); 

     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } catch (ClientProtocolException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

     try { 
      // Create a BufferedReader to parse through the inputStream. 
      BufferedReader reader = new BufferedReader(new InputStreamReader(
        is, "iso-8859-1"), 8); 
      // Declare a string builder to help with the parsing. 
      StringBuilder sb = new StringBuilder(); 
      // Declare a string to store the JSON object data in string form. 
      String line = null; 

      // Build the string until null. 
      while ((line = reader.readLine()) != null) { 
       sb.append(line + "\n"); 
      } 

      // Close the input stream. 
      is.close(); 
      // Convert the string builder data to an actual string. 
      json = sb.toString(); 
     } catch (Exception e) { 
      Log.e("Buffer Error", "Error converting result " + e.toString()); 
     } 

     // Try to 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 the JSON Object. 
     return jObj; 

    } 


    // 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 UrlEncodedFormEntity(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 = URLEncodedUtils.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; 

    } 
} 



getLocalBus.class 


import java.util.ArrayList; 
import java.util.List; 

import org.apache.http.NameValuePair; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONObject; 

import android.app.Activity; 
import android.app.ProgressDialog; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.Log; 
import android.widget.TextView; 


public class GetLocalBus extends Activity { 

    private ProgressDialog pDialog; 

    //gets JSONParser class 
    JSONParser jsonParser = new JSONParser(); 

    TextView txt; 

    double busLat; 
    double busLng; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.get_local); 


    txt= (TextView) findViewById(R.id.TextView5); 
    pDialog = new ProgressDialog(GetLocalBus.this); 




    txt.setText("Connecting..."); 
    new readData().execute(); 

} 
public static final String KEY_121 = "http://getData.php"; 

class readData extends AsyncTask<String, String, String> { 


    boolean failure = false; 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 

     pDialog.setMessage("Getting Places..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected String doInBackground(String... args) { 




     try { 

      List<NameValuePair> params = new ArrayList<NameValuePair>(); 
      params.add(new BasicNameValuePair("lat","37.3324083200000000")); 
      params.add(new BasicNameValuePair("lon","122.0304781500000000")); 
      params.add(new BasicNameValuePair("dist","90")); 

      Log.d("request!", "starting"); 
      // getting product details by making HTTP request 
      JSONObject json = jsonParser.makeHttpRequest(
        KEY_121, "POST", params); 

      busLng = json.optDouble("business_lon",busLng); 
      busLat = json.optDouble("business_lat",busLat); 


     } 
      finally{ 



      } 
    return null; 
     } 

    protected void onPostExecute(String file_url) { 

      if (pDialog != null) { 
       pDialog.dismiss(); 
       pDialog = null; 
      } 

      txt.setText(""+busLng+" "+busLat); 
    } 

} 


} 

我的PHP文件

<?php 


    if(isset($_GET['lat']) && isset($_GET['lon'])&& isset($_GET['dist'])){ 


     $db = new mysqli("myDatabaseUrl","username","password","DBname",0,""); 

     $lat = $_GET['lat']; 
     $lon = $_GET['lon']; 
     $dist = $_GET['dist']; 


     $search_sql = "SELECT business_id, business_lat, business_lon, (3959 * acos(cos(radians(37)) * cos(radians(" . $lat . ")) * cos(radians(" . $lon . ") - radians(-122)) + sin(radians(37)) * sin(radians(" . $lat . ")))) AS distance 
         FROM myTable HAVING distance < " . $dist . " ORDER BY distance LIMIT 1 , 20"; 

     $search_results = $db->query($search_sql); 

     if($search_results->num_rows){ 

      while ($search_results->fetch_assoc()){ 
       //array the the business data 
       $return_data[] = $search_results->fetch_array(); 
      }//end while 

     }else{ 
      $return_data[] = array(); 
     }//end if 


    }else{ 
     $return_data[] = array(); 
    } 

    $bd_json = json_encode($return_data); 

    $db->close(); 

    echo $bd_json; 



?> 

我看着我的瀏覽器的源代碼並沒有看到任何東西，但JSON。這是輸出。

[{"0":"3","business_id":"3","1":"37.393885","business_lat":"37.393885","2":"-122.078916","business_lon":"-122.078916","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"5","business_id":"5","1":"37.394011","business_lat":"37.394011","2":"-122.095528","business_lon":"-122.095528","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"7","business_id":"7","1":"37.390038","business_lat":"37.390038","2":"-122.042034","business_lon":"-122.042034","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"9","business_id":"9","1":"32.723831","business_lat":"32.723831","2":"-117.168326","business_lon":"-117.168326","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"11","business_id":"11","1":"47.557704","business_lat":"47.557704","2":"-122.284985","business_lon":"-122.284985","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"13","business_id":"13","1":"47.614005","business_lat":"47.614005","2":"-122.313985","business_lon":"-122.313985","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"15","business_id":"15","1":"47.672670","business_lat":"47.672670","2":"-122.354092","business_lon":"-122.354092","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"17","business_id":"17","1":"47.618314","business_lat":"47.618314","2":"-122.347998","business_lon":"-122.347998","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"19","business_id":"19","1":"41.248662","business_lat":"41.248662","2":"-96.098760","business_lon":"-96.098760","3":"23.0298400562551","distance":"23.0298400562551"},{"0":"21","business_id":"21","1":"41.273084","business_lat":"41.273084","2":"-95.987816","business_lon":"-95.987816","3":"23.0298400562551","distance":"23.0298400562551"}] 

編輯

try { 

      double lat1 = 37.3324083200000000; 
      String lat = Double.toString(lat1); 

      double lon1 = -122.0304781500000000; 
      String lon = Double.toString(lon1); 

      double dist1 = 25; 
      String dist = Double.toString(dist1); 

      List<NameValuePair> params = new ArrayList<NameValuePair>(); 
      params.add(new BasicNameValuePair("lat",lat)); 
      params.add(new BasicNameValuePair("lon",lon)); 
      params.add(new BasicNameValuePair("dist",dist)); 




LOGIN_URL, "GET", params); 

新的錯誤

08-07 00:24:09.567: E/JSON Parser(9658): Error parsing data org.json.JSONException: Value [{"3":"23.0298400562551","2":"-122.078916","distance":"23.0298400562551","business_lon":"-122.078916","1":"37.393885","0":"3","business_lat":"37.393885","business_id":"3"},{"3":"23.0298400562551","2":"-122.095528","distance":"23.0298400562551","business_lon":"-122.095528","1":"37.394011","0":"5","business_lat":"37.394011","business_id":"5"},{"3":"23.0298400562551","2":"-122.042034","distance":"23.0298400562551","business_lon":"-122.042034","1":"37.390038","0":"7","business_lat":"37.390038","business_id":"7"},{"3":"23.0298400562551","2":"-117.168326","distance":"23.0298400562551","business_lon":"-117.168326","1":"32.723831","0":"9","business_lat":"32.723831","business_id":"9"},{"3":"23.0298400562551","2":"-122.284985","distance":"23.0298400562551","business_lon":"-122.284985","1":"47.557704","0":"11","business_lat":"47.557704","business_id":"11"},{"3":"23.0298400562551","2":"-122.313985","distance":"23.0298400562551","business_lon":"-122.313985","1":"47.614005","0":"13","business_lat":"47.614005","business_id":"13"},{"3":"23.0298400562551","2":"-122.354092","distance":"23.0298400562551","business_lon":"-122.354092","1":"47.672670","0":"15","business_lat":"47.672670","business_id":"15"},{"3":"23.0298400562551","2":"-122.347998","distance":"23.0298400562551","business_lon":"-122.347998","1":"47.618314","0":"17","business_lat":"47.618314","business_id":"17"},{"3":"23.0298400562551","2":"-96.098760","distance":"23.0298400562551","business_lon":"-96.098760","1":"41.248662","0":"19","business_lat":"41.248662","business_id":"19"},{"3":"23.0298400562551","2":"-95.987816","distance":"23.0298400562551","business_lon":"-95.987816","1":"41.273084","0":"21","business_lat":"41.273084","business_id":"21"}] of type org.json.JSONArray cannot be converted to JSONObject 

Answer 1

變化需要PHP側

$db = new mysqli("myDatabaseUrl","username","password","username",0,""); 

應該

$db = new mysqli("myDatabaseUrl","username","password","Your_dbname"); 

你得到這個錯誤是因爲php在你的json輸出之前產生錯誤。 您不能插座有0端口和""更好地讓他們獨立，如果你沒有在非標準端口運行MySQL。

mysqli的構造是參考http://php.net/manual/en/mysqli.construct.php

的mysqli :: __構建體（）（[字符串$主機= ini_get（ 「mysqli.default_host」） [，字符串$用戶名= ini_get（ 「mysqli.default_user」） [，string $ passwd = ini_get（「mysqli.default_pw」）[，string $ dbname =「」[，int $ port = ini_get（「mysqli.default_port」）[，string $ socket = ini_get（「mysqli.default_socket 「）]]]]]]]）

同時檢查您發送給php的ULR是否正確ct格式。您可以在if塊之前使用以下命令回顯請求的URL，該腳本將只返回URL。

die($_SERVER["REQUEST_URI"]); 

變化需要Java方面

PHP代碼發送的JSONObject的JSONArray，儘量轉換成JSON數組。

JSONArray jArr = new JSONArray(json);.