JavaWeb中如何实现自定义的Filter过滤器？

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javaFilter @WebFilter(/CharacterFilter)public class CharacterFilter implements Filter {

@Override public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException { // 过滤逻辑 }

@Override public void destroy() { // 销毁逻辑 }}

@WebFilter("/CharacterFilter") public class CharacterFilter implements Filter { public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) resp; request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); chain.doFilter(request, response); } public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub } }