JSF Encode UTF - 8?

Now I am working with my friend, he is Vietnamese and he wants to create a website using the Vietnamese Language, but we have a problem with Encode UTF-8. I wrote a Filter class as follows:

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class CharsetFilter implements Filter
{
    private String encoding;   

    public void init(FilterConfig config) throws ServletException
    {
        encoding = config.getInitParameter("requestEncoding");
        if( encoding==null ) encoding="UTF-8";
     }
    public v开发者_StackOverflow社区oid doFilter(ServletRequest request, ServletResponse response, FilterChain  next)   throws IOException, ServletException
    {
        // Respect the client-specified character encoding
        // (see HTTP specification section 3.4.1)
        if(null == request.getCharacterEncoding())
            request.setCharacterEncoding(encoding);
        /** * Set the default response content type and encoding */
        response.setContentType("text/html; charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
        next.doFilter(request, response);
        }

    @Override
    public void destroy() {}
}

config in web.xml:

<filter>
        <filter-name>CharsetFilter</filter-name>
        <filter-class>com.mypackage.CharsetFilter</filter-class>
        <init-param>
                <param-name>requestEncoding</param-name>
                <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharsetFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

in Server Resources - sun-resources.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE resources PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 9.0 Resource Definitions //EN" "http://www.sun.com/software/appserver/dtds/sun-resources_1_3.dtd">
<resources>
  <jdbc-connection-pool allow-non-component-callers="false" associate-with-thread="false" connection-creation-retry-attempts="0" connection-creation-retry-interval-in-seconds="10" connection-leak-reclaim="false" connection-leak-timeout-in-seconds="0" connection-validation-method="auto-commit" datasource-classname="com.mysql.jdbc.jdbc2.optional.MysqlDataSource" fail-all-connections="false" idle-timeout-in-seconds="300" is-connection-validation-required="false" is-isolation-level-guaranteed="true" lazy-connection-association="false" lazy-connection-enlistment="false" match-connections="false" max-connection-usage-count="0" max-pool-size="32" max-wait-time-in-millis="60000" name="vietweb" non-transactional-connections="false" pool-resize-quantity="2" res-type="javax.sql.DataSource" statement-timeout-in-seconds="-1" steady-pool-size="8" validate-atmost-once-period-in-seconds="0" wrap-jdbc-objects="false">
        <property name="serverName" value="localhost"/>
        <property name="portNumber" value="3306"/>
        <property name="databaseName" value="vietweb"/>
        <property name="User" value="root"/>
        <property name="Password" value="12345"/>
         <property name="useUnicode" value="true"/>
        <property name="characterEncoding" value="UTF8"/>
        <property name="URL" value="jdbc:mysql://localhost:3306/vietweb"/>
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
  </jdbc-connection-pool>
  <jdbc-resource enabled="true" jndi-name="jdbc/vietweb" object-type="user" pool-name="mysql_vietweb_rootPool"/>
</resources>

in JSF page:

<meta http-equiv="content-type" content="text/html; charset=utf-8"/>

But it is not being encoded to Vietnamese. How can we make it encode to Vietnamese?

Problem with save data into DB ( i use DB is MySQL) I want/expect this output:

chuyển phát nhanh để chuyển tới những cuốn sách

but I see this unexpected output:

chuy?n phát nhanh ?? chuy?n t?i nh?ng ??u sách 

---

The symptoms indicate that the MySQL DB and/or table is been created as ISO-8859-x instead of UTF-8. Any character which is been outside the ISO-8859-x range will then be stored as ?. Update the DB and/or table as follows:

ALTER DATABASE dbname DEFAULT CHARACTER SET utf8;
USE dbname;
ALTER TABLE tblname CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

The webapp and DB connection settings are perfectly fine. You would otherwise have seen mojibake instead of question marks.

---

That said, the CharsetFilter is in essence unnecessary. JSF on Facelets already uses UTF-8 by default. When you're still using legacy JSP instead of Facelets, all you need to do is adding the following line to top of JSP:

<%@ page pageEncoding="UTF-8" %>

and do only request.setCharacterEncoding() in the filter (and do nothing with response).

See also:

• Unicode - How to get characters right?

---

I've solve my problem by this statement:

jdbc:mysql://localhost:3306/db_name?**useUnicode=yes&characterEncoding=UTF-8**