场景：渲染引擎

若采用渲染引擎，JSP等VIEW渲染技术，可以通过addViewController的方式解决。

  • 配置文件方式 ```java @Configuration public class DefaultView extends WebMvcConfigurerAdapter {

    @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController(“/Blog”).setViewName(“forward:index.jsp”); registry.setOrder(Ordered.HIGHEST_PRECEDENCE); super.addViewControllers(registry); }

}

  2. - **控制器配置方式**
  3. ```java
  4. @Controller
  5. @RequestMapping("/")
  6. public class IndexController {
  8.   @RequestMapping("/Blog")
  9.   public String index() {
  10.     return "forward:index.html";
  11.   }
  13. }

场景：前后端分离

若完全采用前后端分离的模式，即前端所有资源都放在addresourceHandler配置的路径下。

  1. @Configuration
  2. public class WebMVCConfig extends WebMvcConfigurationSupport  {
  4.     @Override
  5.     public void addResourceHandlers(ResourceHandlerRegistry registry) {
  6.         registry.addResourceHandler("/static/**")
  7.                 .addResourceLocations("classpath:/static/static/");
  8.         registry.addResourceHandler("/**")
  9.                 .addResourceLocations("classpath:/static/");
  10.         registry.addResourceHandler(new String[] { "/static/images/**" });
  11.         super.addResourceHandlers(registry);
  12.     }
  14. }

此时不能通过配置addViewController的方式解决，会抛出异常：“javax.servlet.ServletException: Could not resolve view with name ‘forward:/index.html’ in servlet with name ‘dispatcherServlet’”。只能通过response.redirect(“index.html”)的方式重指向默认主页。

  1. @Controller
  2. public class DefaultController {
  4.     @RequestMapping("/")
  5.     public void index(HttpServletResponse response) throws IOException {
  6.         response.sendRedirect("index.html");
  7.     }
  9.     @RequestMapping(value = "/{[path:[^\\.]*}")
  10.     public void other(HttpServletResponse response) throws IOException {
  11.         response.sendRedirect("index.html");
  12.     }
  14. }

参考

脚本之家：SpringBoot设置默认主页的方法步骤
https://www.jb51.net/article/202536.htm