Spring Boot注册拦截器

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello() {
        return "Hello";
    }
}

/**
 * 定义自定义拦截器
 */
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("preHandle方法");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle方法");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion方法");
    }
}

/**
 * 配置自定义拦截器
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    //注入自定义拦截器
    @Bean
    MyInterceptor myInterceptor() {
        return new MyInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //拦截所有路径 存在多个拦截器时要配置优先级
        registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
    }
}