Change Glassfish Servlet Encoding/Charset - servlets

Question

I'm sending a Serializable object to Servlet on Glassfish 4.1 server, the object has String fields with Arabic chars, when I try to log the Arabic values I got (?????)
I've read This and This and many other posts but nothing solved the problem, I've tried the same codes on Tomcat 8 Server and it works fine
What should I do with Glassfish server or my Servlet to read UTF-8 chars correctly?
Sending the Serializable object:
url = new URL(ServerInfo.STORABLE_RECEIVER_URL);
http = (HttpURLConnection) url.openConnection();
http.setRequestProperty("content-type", "application/x-object; charset=utf-8");
http.setRequestProperty("Accept-Charset", "UTF-8");
http.setDoOutput(true);
http.setDoInput(true);
out = new ObjectOutputStream(http.getOutputStream());
out.writeObject(t);
web.xml
<filter>
<filter-name>Set Response Character Encoding</filter-name>
<filter-class>net.abdullahcodes.serv.MyFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Response Character Encoding</filter-name>
<url-pattern>/TradableReceiver</url-pattern>
<url-pattern>/*</url-pattern>
<url-pattern>/</url-pattern>
</filter-mapping>
<locale-encoding-mapping-list>
<locale-encoding-mapping>
<locale>ar</locale>
<encoding>UTF-8</encoding>
</locale-encoding-mapping>
<locale-encoding-mapping>
<locale>en</locale>
<encoding>UTF-8</encoding>
</locale-encoding-mapping>
</locale-encoding-mapping-list>
MyFilter
Copied from Omri Spector answer on This
glassfish-web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app>
<jsp-config>
</jsp-config>
<parameter-encoding default-charset="UTF-8" />
</glassfish-web-app>
Servlet test received Serializable object:
log("sys: "+System.getProperty("file.encoding"));
log("def: "+Charset.defaultCharset());
log("size: "+b.totalRowsCount()+", "+b.totalColumnsCount());
log("test arabic: هلوووووووووويااا");
System.out.println("test sysout: اوووه خطبها نصيب");
while (b.hasNext()) {
Position p = new Position();
p.setEn(b.next());
p.setAr(b.next());
log("p: "+p.toString());
}
Console output on Glassfish:
log():net.abdullahcodes.serv.TradableReceiver: sys: Cp1252
log():net.abdullahcodes.serv.TradableReceiver: def: windows-1252
log():net.abdullahcodes.serv.TradableReceiver: size: 4, 2
log():net.abdullahcodes.serv.TradableReceiver: test arabic: ????????????????
Info: test sysout: ????? ????? ????
log():net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: fatima, ar: abod
log():net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: maryam, ar: nora
log():net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: ????, ar: ????
log():net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: ????, ar: ????
Console output on Tomcat:
log INFO: net.abdullahcodes.serv.TradableReceiver: sys: UTF-8
log INFO: net.abdullahcodes.serv.TradableReceiver: def: UTF-8
log INFO: net.abdullahcodes.serv.TradableReceiver: size: 4, 2
log INFO: net.abdullahcodes.serv.TradableReceiver: test arabic: هلوووووووووويااا
test sysout: اوووه خطبها نصيب
log INFO: net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: fatima, ar: abod
log INFO: net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: maryam, ar: nora
log INFO: net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: احمد, ar: صالح
log INFO: net.abdullahcodes.serv.TradableReceiver: p: id: 0, en: حسين, ar:

Answer 1

You need to set the command line property:
-Dfile.encoding=UTF-8
when starting Glassfish.
If you're starting from your IDE then you need to add this setting to the launch configuration.
If Glassfish is being started as a service then you need to set an environment variable:
JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF-8