~~~ package com.kimgao.bootlauch.config; import lombok.extern.slf4j.Slf4j; import javax.servlet.*; import javax.servlet.annotation.WebFilter; import java.io.IOException; //注册器名称为customFilter,拦截的url为所有 @WebFilter(filterName="customFilter",urlPatterns={"/*"}) @Slf4j public class CustomFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { log.info("filter 初始化"); } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { log.info("customFilter 请求处理之前"); //对request、response进行一些预处理 // 比如设置请求编码 // request.setCharacterEncoding("UTF-8"); // response.setCharacterEncoding("UTF-8"); //链路 直接传给下一个过滤器 chain.doFilter(request, response); log.info("customFilter 请求处理之后"); } @Override public void destroy() { log.info("filter 销毁"); } } ~~~