方式一：
继承WebMvcConfigurerAdapter，重写addViewControllers。
@Configuration
public class WebConfigurer extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("/login");
registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
super.addViewControllers(registry);
}
}
方式二：
添加“/” 的映射
@Controller
public class HomeController {
@RequestMapping(value = "/")
public String homePage() {
return "login";
}