用struts 的中文乱码 问题

这是过滤器的类
import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import java.io.IOException;/**
*
* Date: 2005-9-19
* Time: 17:33:36
* @author Duzk
*/
public class MyFilter extends HttpServlet implements Filter {
private FilterConfig filterConfig;
//Handle the passed-in FilterConfig
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
}//Process the request/response pair
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) {try {
request.setCharacterEncoding("GBK");
filterChain.doFilter(request, response);} catch (ServletException sx) {
filterConfig.getServletContext().log(sx.getMessage());
} catch (IOException iox) {
filterConfig.getServletContext().log(iox.getMessage());
}
}//Clean up resources
public void destroy() {
}
}然后在web.xml里加上这段
<filter>
<filter-name>MyFilter</filter-name>
<filter-class>类路径.MyFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>MyFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>