Can anybody tell me how to use it?I tried,but seemly ,filter
worked,but servlet does not work,

=====
FilterDemo
=====
@Override
        public void doFilter(ServletRequest request, ServletResponse
response,
                        FilterChain chain) throws IOException, ServletException
        {
                System.out.println(request.getProtocol());
                request.setCharacterEncoding("ISO8859_1");
        }
=====

---------------------
web.xml configuration


<web-app>

  <!-- Servlets -->
  <servlet>
    <servlet-name>greetServlet</servlet-name>
    <servlet-class>com.ts.gwttest.server.GreetingServiceImpl</servlet-
class>
  </servlet>

  <servlet-mapping>
    <servlet-name>greetServlet</servlet-name>
    <url-pattern>/gwttest/greet</url-pattern>
  </servlet-mapping>



  <!-- Default page to serve -->
  <welcome-file-list>
    <welcome-file>GWTTest.html</welcome-file>
  </welcome-file-list>

         <!-- FilterDemo -->
  <filter>
    <filter-name>FilterDemo</filter-name>
    <filter-class>com.ts.gwttest.server.FilterDemo</filter-class>
  </filter>

  <filter-mapping>
    <filter-name>FilterDemo</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>
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