过滤器Filter&&监听器Listener

    


class X implements Filter{
      public void destroy() {

      }
      public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
chain.doFilter(request, response);
      }
      public void init(FilterConfig arg0) throws ServletException {

      }

}