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Asked: 2026-06-17T23:20:35+00:00

I have problem with decoding parameters sent by Flash Player HttpService (data from Spark

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I have problem with decoding parameters sent by Flash Player HttpService (data from Spark Form) and received in Java Servlet. This is client code of HttpService and Form:

<mx:HTTPService id="submitForm" result="onResultSend(event)" method="POST" url="{EVMServerConnection.SERVER_ADDRESS}/UserSubmitionServlet" useProxy="false" resultFormat="text">
        <mx:request xmlns="">
            <login>{login.text}</login>
            <password>{password.text}</password>
            <email>{email.text}</email>
            <userName>{userName.text}</userName>
            <secondName>{secondName.text}</secondName>
            <gender>{String(gender.selectedItem)}</gender>
            <countryKey>{String(country.selectedItem)}</countryKey>
            <city>{city.text}</city>
            <dateOfBirth>{String(dayOfBirth.selectedItem) + String(monthOfBirth.selectedItem) + String(yearOfBirth.selectedItem)}</dateOfBirth>
        </mx:request> 
    </mx:HTTPService>

The servlet method:

private void registerUser(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {
    //request.setCharacterEncoding("UTF-16LE");
    System.out.println(request.getCharacterEncoding());
    String login = request.getParameter("login");
    String password = request.getParameter("password");
    String email = request.getParameter("email");
    //String userName = DataUtils.getUTF8FromUTF16String( request.getParameter("userName") );
    //String userName = request.getParameter("userName");
    byte[] bytes = request.getParameter("userName").getBytes();
    String userName = new String(bytes , "Unicode" );
    System.out.println("UserName: " + userName);
    String secondName = request.getParameter("secondName");
    String gender = request.getParameter("gender");
    boolean isMale = false;
    if (gender != null)
        isMale = !gender.equals("1");
    //String countryKey = request.getParameter("countryKey");
    String city = request.getParameter("city");
    String dateOfBirth = request.getParameter("dateOfBirth");
    Date dateDateOfBirth = null;

When I try to display userName on console i get Chinese signs though it should be Polish letters. I tried to use UTF-16, UTF-16LE, UTF-16BE instead of Unicode parameter in new String() but the results were similar.

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1 Answer

  1. Editorial Team

    Helpful was class offered by Apache Tomcat 7, which I am using. I have added SetCharacterEncodingFilter in my web.xml, and now everything works fine and I can read parameters in ordinary way (by String name = request.getParameter(“name”) )

    ...
<filter>
    <filter-name>SetCharacterEncoding</filter-name>
    <filter-class>org.apache.catalina.filters.SetCharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>SetCharacterEncoding</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
...
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