1.spring boot拦截器默认有 

• HandlerInterceptorAdapter
• AbstractHandlerMapping
• UserRoleAuthorizationInterceptor
• LocaleChangeInterceptor
• ThemeChangeInterceptor

2.配置spring mvc的拦截器WebMvcConfigurerAdapter 

public class WebAppConfig extends WebMvcConfigurerAdapter

3.实现添加拦截器方法 

public void addInterceptors(InterceptorRegistry registry){

}
registry.addInterceptor可以通过此方法添加拦截器, 可以是spring提供的或者自己添加的

4.实例部分 

               public class WebAppConfig extends WebMvcConfigurerAdapter{                public static void main(String[] args) {                  SpringApplication.run(WebAppConfig.class, args);              }                             /**              * 配置拦截器              * @author lance              * @param registry              */              public void addInterceptors(InterceptorRegistry registry) {                  registry.addInterceptor(new UserSecurityInterceptor()).addPathPatterns("/user/**");              }          }                    UserSecurityInterceptor代码          public class UserSecurityInterceptor implements HandlerInterceptor {                        @Override              public boolean preHandle(HttpServletRequest request,                      HttpServletResponse response, Object handler) throws Exception {                                    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 {                        }                    }
public class WebAppConfig extends WebMvcConfigurerAdapter{
    public static void main(String[] args) {
        SpringApplication.run(WebAppConfig.class, args);
    }

    /**
     * 配置拦截器
     * @author lance
     * @param registry
     */
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new UserSecurityInterceptor()).addPathPatterns("/user/**");
    }
}

UserSecurityInterceptor代码
public class UserSecurityInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {

        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 {

    }

}