Question

我要做的是使用json解析器类，以便将字符串传入和传出sql数据库。

为了做到这一点，我正在使用下一个JsonParser类代码来传递和获取sql数据库的字符串值 -

public class JSONParser {

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


public JSONParser() {

}


public JSONObject getJSONFromUrl(final String url) {


    try {

        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);


        HttpResponse httpResponse = httpClient.execute(httpPost);

        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 {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }


    return jObj;

}


// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
        List<NameValuePair> params) {


    try {


        if(method == "POST"){

            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"){

            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 {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }


    return jObj;

}
}

现在它在需要处理英文字母时工作正常，但是当我试图传递非英文字母时，它会变成问号。

我可以在Sql DB上看到问号，当我使用该类从Sql读取结果时，我将这些问号作为结果。

所以我猜测JasonParser类在向Sql发送数据时遗漏了一些东西。

为了确保所有其他组件都很好，我正在添加从应用程序发送到服务器的信息中的代码。

下一个代码是php，用于访问数据库 -

  $username = "xxxxx"; 
$password = "xxxxx"; 
$host = "xxxxx"; 
$dbname = "xxxxxx"; 



$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'); 


try 
{ 

    $db = new PDO("mysql:host={$host};dbname={$dbname};charset=utf8", $username, $password, $options); 
} 
catch(PDOException $ex) 
{ 

    die("Failed to connect to the database: " . $ex->getMessage()); 
} 

$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 


$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC); 


if(function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc()) 
{ 
    function undo_magic_quotes_gpc(&$array) 
    { 
        foreach($array as &$value) 
        { 
            if(is_array($value)) 
            { 
                undo_magic_quotes_gpc($value); 
            } 
            else 
            { 
                $value = stripslashes($value); 
            } 
        } 
    } 

    undo_magic_quotes_gpc($_POST); 
    undo_magic_quotes_gpc($_GET); 
    undo_magic_quotes_gpc($_COOKIE); 
} 


header('Content-Type: text/html; charset=utf-8'); 


session_start();

下一个代码是我如何设置Sql表 -

      CREATE TABLE IF NOT EXISTS `users` (
  `Id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `username` varchar(45) NOT NULL DEFAULT '',
  `password` varchar(32) NOT NULL DEFAULT '',
  PRIMARY KEY (`Id`),
  UNIQUE KEY `Index_2` (`username`),
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

正如你所看到的那样，我在两个代码中使用了 - utf8 - 编码 - 这就是为什么我认为我的JsonParser类中缺少某些内容以使其工作正常。

那我在这里错过了什么？

感谢您提供任何帮助

Answer 1

好像我已经解决了 -

行 -

 httpPost.setEntity(new UrlEncodedFormEntity(params));

应该是 -

 httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

Android - 使用json传递非英文字符，并将其作为问号（???）与服务器相连

1 个答案: