Filter

public class CustomFilter implements javax.servlet.Filter {	@Override	public void init(FilterConfig filterConfig) throws ServletException {	}	@Override	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)			throws IOException, ServletException {		//before		chain.doFilter(request, response);       //after	}	@Override	public void destroy() {	}}

Interceptor

import org.springframework.web.servlet.HandlerInterceptor;//第一种 实现接口public class CustomInterceptor implements HandlerInterceptor {	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)throws Exception {		return false;	}	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,			ModelAndView modelAndView) throws Exception {	}	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)			throws Exception {	}}import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;//第二种继承Adaptorpublic class CustomInterceptor2 extends HandlerInterceptorAdapter {}

interceptor配置

执行顺序

Filter.doFilter -->Filter.chain.doFilter() --> Interceptor.preHandle-->

Controller.execute-->

Interceptor.postHandle-->Controller.response-->

Interceptor.afterCompletion-->Filter.chain.doFilter() after;