一、编写自定义拦截器SignAutheInterceptor.class

preHandle：在业务处理器处理请求之前被调用。预处理，可以进行编码、安全控制、权限校验等处理；
postHandle：在业务处理器处理请求执行完成后，生成视图之前执行。后处理（调用了Service并返回ModelAndView，但未进行页面渲染），有机会修改ModelAndView （这个博主就基本不怎么用了）；
afterCompletion：在DispatcherServlet完全处理完请求后被调用，可用于清理资源等。返回处理（已经渲染了页面）；

package com.xiaohang.socialcard.pre.intercepter;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 自定义拦截器 */public class SignAutheInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { /** * 通过HttpServletRequest和HttpServletResponse做相应数据处理 */ return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { }}二、配置拦截器InterceptorConfig.class

通过addPathPatterns属性可配置需要进行拦截的请求路径
通过excludePathPatterns属性可配置不进行拦截的请求路径

package com.xiaohang.socialcard.pre.intercepter;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * 配置拦截器 */@Configurationpublic class InterceptorConfig extends WebMvcConfigurerAdapter { @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(new SignAutheInterceptor()).addPathPatterns("/api/v1/get/getToken"); super.addInterceptors(registry); }}