springboot配置拦截器和资源映射

• 创建class类实现org.springframework.web.servlet.HandlerInterceptor

@Slf4j//lombak方便打日志
@Component//注册到spring容器中方便注入
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("前置拦截");
        return true;//根据布尔值设置拦截和放行
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("后置拦截");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        log.info("最终拦截");
    }
}

• 创建配置类实现org.springframework.boot.autoconfigure.web.servlet.WebMvcConfigurer 接口

@Configuration
public class MvcConfig implements WebMvcConfigurer {

    @Autowired
    private MyInterceptor myInterceptor;//注入拦截器

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //配置拦截器,并且设置拦截路径
        registry.addInterceptor(myInterceptor).addPathPatterns("/**");
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //设置资源映射 location 用 file://,window用/E:/ww表示资源路径
        registry.addResourceHandler("/files/**")
                .addResourceLocations("file:///E:/ww/demos/source/");
    }
}

拦截器和资源映射的最终效果