首頁處理

@Bean
public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext,
                                                           FormattingConversionService mvcConversionService,
                                                           ResourceUrlProvider mvcResourceUrlProvider) {
    WelcomePageHandlerMapping welcomePageHandlerMapping 
 
= new WelcomePageHandlerMapping(
        new TemplateAvailabilityProviders(applicationContext), applicationContext, getWelcomePage(), // getWelcomePage 獲得歡迎頁
        this.mvcProperties.getStaticPathPattern());
    welcomePageHandlerMapping.setInterceptors(getInterceptors(mvcConversionService, mvcResourceUrlProvider));
    
 
return welcomePageHandlerMapping;
}

點進去繼續看

        private Resource getWelcomePage() {
            for (String location : this.resourceProperties.getStaticLocations()) {
                Resource indexHtml = getIndexHtml(location);
                if (indexHtml != null) {
                    return
 
 indexHtml;
                }
            }
            ServletContext servletContext = getServletContext();
            if (servletContext != null) {
                return getIndexHtml(new ServletContextResource(servletContext, SERVLET_LOCATION));
            }
            return null;
        }

        private Resource getIndexHtml(String location) {
            return getIndexHtml(this.resourceLoader.getResource(location));
        }

靜態資原始檔夾下的所有 index.html 頁面；被 /** 對映。

比如我訪問 http://localhost:8080/，就會找靜態資原始檔夾下的 index.html

新建一個 index.html ，在下面的3個目錄中任意一個；然後訪問測試 http://localhost:8080/看結果！