SpringBoot配置 访问路径到视图的映射

增加此配置后，就不需要在controller中手动写路径到视图的映射了

@Configuration
public class GulimallWebConfig implements WebMvcConfigurer {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("index.html").setViewName("index");
        registry.addViewController("reg.html").setViewName("reg");
    }
}