springboot过滤器和拦截器（二）

springboot过滤器和拦截器

定义一个拦截器从，session中反查出用户信息，当然这只是一个demo

@Component
public class HttpRequestInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String cookie = response.getHeader("Set-Cookie");
        User user = User.build(cookie);
        request.setAttribute("user",user);
        return true;
    }
}

注册拦截器

@Configuration
public class RegisterInterceptorConfig implements WebMvcConfigurer {
    @Autowired
    private HttpRequestInterceptor httpRequestInterceptor;


    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        InterceptorRegistration registration = registry.addInterceptor(httpRequestInterceptor);
        registration.addPathPatterns("/**");
    }
}

现在每一个Request的请求都会本拦截，然后再attribute中放入一个user对象。

现在把user取出来

@GetMapping(value = "list")
    public Response<InfoVO>   listProcess(@RequestParam Integer page,
                @RequestParam Integer size,
                @RequestAttribute("user") User user ) {
        log.info(user.toString());
        return Response.single(all);
    }