Encodage dans Java Servlet Google App Engine

Question

J'utilise Google App Engine pour extraire des données de la base de données. quand je récupère des textes arabes, ça renvoie quelque chose comme ça "? § ??? ¹ ????????"

ici est HttpServlet:

public class MyServlet extends HttpServlet { 
@Override 
public void doGet(HttpServletRequest request, HttpServletResponse response) 
     throws IOException { 
    PrintWriter writer = response.getWriter(); 

    final String contentType = "text/plain;charset=UTF-8"; 
    final String characterEncoding = "UTF-8"; 

    response.setContentType(contentType); 
    response.setCharacterEncoding(characterEncoding); 

    writer.println(response.getContentType()); 
    writer.println(response.getCharacterEncoding()); 
    writer.println("السلام عليكم:"); 
} 
} 

la sortie est:

text/plain; charset=iso-8859-1 
ISO-8859-1 
?§???³???§?? ?¹????????: 

appengine-web.xml:

<?xml version="1.0" encoding="utf-8"?> 

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0"> 

    <application>myApplicationID</application> 

    <use-google-connector-j>true</use-google-connector-j> 

    <version>1</version> 

    <threadsafe>true</threadsafe> 

    <system-properties> 

     <property name="java.util.logging.config.file" value="WEB-INF/logging.properties" /> 

     <property name="file.encoding" value="UTF-8" /> 

     <property name="appengine.file.encoding" value="UTF-8" /> 

     <property name="DEFAULT_ENCODING" value="UTF-8" /> 

    </system-properties> 

    <env-variables> 

     <env-var name="DEFAULT_ENCODING" value="UTF-8" /> 

    </env-variables> 
</appengine-web-app> 

J'utilise: Android Studio - Durée: JAVA 7 - Environnement: Standard

ceci est de Mon navigateur Chrome: Response and Request Headers

Answer 1

J'ai trouvé la solution.

le problème est que je reçois l'écrivain avant de type de contenu

de sorte que le code doit être:

public class MyServlet extends HttpServlet { 
    @Override 
    public void doGet(HttpServletRequest request, HttpServletResponse response) 
     throws IOException { 
     final String contentType = "text/plain;charset=UTF-8"; 
     final String characterEncoding = "UTF-8"; 

     response.setContentType(contentType); 
     response.setCharacterEncoding(characterEncoding); 

     PrintWriter writer = response.getWriter(); 

     writer.println(response.getContentType()); 
     writer.println(response.getCharacterEncoding()); 
     writer.println("السلام عليكم:"); 
    } 
}