How to solve the problem of garbled Chinese with filters

public class EncodingFilter implements Filter {

@Override
public void destroy() {
// TODO Auto-generated method stub

}

@Override
public void doFilter(ServletRequest req, ServletResponse resp,
FilterChain chain) throws IOException, ServletException {
// TODO Auto-generated method stub
HttpServletRequest request=(HttpServletRequest)req;
HttpServletResponse response=(HttpServletResponse)resp;

("UTF-8");
("text/html;charset=UTF-8");

(req, resp);

}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub

}
}

<filter>
 <filter-name>EncodingFilter</filter-name>
 <filter-class></filter-class>
 </filter>



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